Model 3 HW3 brain replacement can cause temporary amnesia but Tesla Service can quickly restore your settings, all you need to know before you go

Posted by Paul Braren on Feb 27 2020 (updated on Jul 15 2020) in
  • EVs
  • Tesla
  • Test.
    Turns out Tesla Raj ran into this same all-settings-lost situation one day after me, and was told Tesla can't always restore settings. See his reply to my comment. Tesla Canuck and Mother Frunker lost their settings too, my article is about a possible fix. Spoiler alert, Autosteer and Navigate on Autopilot behavior were noticeably improved on HW3, demonstrated in my 4K video below.

    FSD Computer


    This article has some tips for Tesla Model 3 owners, best read when waiting for your Tesla-determined turn to get your FSD Computer upgraded, but more likely read when you're Googling for a fix to finding your Model 3 in an as-new, factory default state on your HW3 pick-up day.

    For those who haven't been notified by Tesla Service, that's rare. Reach out to them instead, see exactly how in Mother Frunker's video, How To Get FSD Hardware 3.0 Upgrade Quicker.


    Thumbnail of TeslaTap image, tap to visit source article at TeslaTap.

    If you find your settings and profiles are all gone when you go to pick up your HW3 retrofitted Model 3, ask Tesla Service politely to try to restore your settings, they may be able to get them back. If needed, reference my invoice number 3000S0000836412, in case it has helpful service notes. The rest of this article gets into my somewhat convoluted story of data loss and data recovery, resulting in a helpful checklist for all new HW3 retrofit customers.

    Note, even if you do get your settings restored, please note that your MCU (infotainment system) has been replaced since it's part of your FSD Computer assembly, detailed at TeslaTap. This means that your Model 3's WiFi and Bluetooth modules are new too, and so is your browser. Your other software including Navigation and Games are probably now older/back-level.

    After Tesla Service restored all my settings, this checklist below spells out what I did to reconfigure my Model 3 to get back to exactly where it was when I dropped it off with HW2.5, but now with the ~20X faster HW3 FSD Computer.


    Free Supercharging: If you find this article of value and decide to order a Tesla, please consider using this referral link when placing your order so you and I both get 1,000 miles of free Supercharging. If you order Solar, it's a $250 award after system activation.


    1) Before Dropping Off for HW3 FSD Computer Upgrade

    1. Empty your glovebox. Source.
    2. Bring your key card with valet key card holder, Tesla service will need this. Source.
    3. Record all your settings, just in case. I'd suggest taking video as you go through all your menus, in all your most important seating profiles. Be sure to include Odometer Trip Meters and FM presets.
    4. Take pictures of everything, just in case. See what Bet TSLA has to say:

      ...they are taking things apart. Take pictures of everything. You don't want to argue about whether a scratch was there before, or whether that piece of trim was misaligned.

    5. Thanks to Bet TSLA's post on TMC Forums, this crucial additional tip:

      Good checklist. But I didn't see the universal "before dropping off your car for service" item, which is even more important in this case because they are taking things apart. Take pictures of everything. You don't want to argue about whether a scratch was there before, or whether that piece of trim was misaligned.

    2) Immediately After You Get Your Car Back, Before You Leave Tesla Service

    As soon as you get back into your Model 3:

    Software, Additional vehicle information
    1. Verify your Software, Additional vehicle information screen says:
      "Autopilot computer: Full self-driving computer".
    2. Verify you are able to open your glovebox. Source.
    3. Verify your settings, preferences, and odometer trips are still there.

    If the answer is no to any of the 4 items above, ask Tesla Service for assistance, requesting that they restore your settings. If they doubt it can be done, politely refer them to this article's handy short URL:

    3) Before You Leave Tesla Service

    Once they've restored your settings, the below actions are still needed, and take about 5-10 minutes. In combination, they will help ensure you have a less distracting and safer drive home:

    1. Verify you have a new menu option to show visualizations including traffic lights and stop signs. Go into your Car menu (bottom-left-most icon), select Autopilot, then turn on the slider for "Traffic Light and Stop Sign Control (Beta)".
    2. Re-pair your phone's Bluetooth connection, deleting the old one first. The procedure is on page 139 of the Tesla Model 3 manual, and in this video by Now You Know. If Bluetooth menu hangs like mine did, reboot, then try again.
    3. Re-configure your Messages, explained by Tesletter here.
    4. Verify your Navigate on Autopilot settings are how you like them. Source.
    5. If you have an active subscription to Tesla Premium Connectivity, you should check if your navigation maps show you the optional Satellite maps, if they have trouble downloading despite a strong LTE signal, a Full System Reboot worked for me, then check for Satellite maps again.
    6. This information might apply to Tesla Model 3, with a Model S owner reporting that after his upgrade to MCU2, you should make sure your mobile app can unlock the doors and open the trunk and frunk. Special thanks to ImpetuousRacer's post at TMC Forums where explains that this can happen if Tesla forgets to "reset your security remote key" before you leave, and thanks to Scott for contacting me so I can let my readers know.
      Image courtesy of model3man, who noted that he had to update his maps on his home WiFi before he could engage the new visualizations.
    7. When driving home, you might not be able to engage Autopilot right away, with a "Calibration in progress" warning on the display your indication it needs a few more miles before it will engage. This is very much like the day you took delivery of your new Model 3, usually taking less than 25 miles, more details here. You might also get a warning about connecting to WiFi first for the latest maps.

    Now you're ready to drive home and answer incoming calls or messages safely, hands-free.

    4) When You Get Back Home

    Your goal when you get back home is to get Software to show "Your car software is up to date."
    1. If you have HomeLink and can no longer open your garage door when you get back home, you'll need to re-pair it. Instructions Tesla here, and in video form by DÆrik here or At Tech here. Once you're done testing this and positioning your car back in your garage which likely has stronger WiFi, you're ready to proceed with downloads.
    2. Select your preferred WiFi network, enter your WiFi password. Alternatively, if you don't have WiFi where you park, you can use a cellular device's Hotspot function for such updates, but it will gobble up lots of data.
    3. Select the 3rd up-arrow icon from the bottom left, select Software tab.
    4. If you see Software Update Available, do that before proceeding.
      In my case, Tesla Service had done that for me before pick-up.
    5. If you see Navigation Data Update available, tap on the blue "connect to Wi-Fi" onscreen link and the update should start downloading, followed by an automatic Game Update, you can proceed with the rest of the steps while the downloads happen in the background.
    6. Log in to Spotify.
    7. Log in to Plex using Google credentials at before YouTube, to avoid a browser error due to an expired TLS certificate. The error is "Couldn't Sign You in. This browser or app may not be secure"
    8. YouTube login.
    9. Hulu login.


    Consumer Reports recent 10 Top Picks of 2020: Best Cars of the Year article states:

    When selecting Top Picks, we only consider CR-recommended models that come standard with forward collision warning (FCW) and automatic emergency braking (AEB) with pedestrian detection. This is the first year we’ve required standard pedestrian detection to be eligible. This feature works with AEB to sense when people are in a car’s pathway and automatically brake, if needed. We believe all of these features have the potential to save lives and shouldn’t cost extra as part of an options package.

    It's fair to say that every millisecond counts when it comes to ingesting and interpreting the stream of data from 8 cameras, 12 ultrasonic sensors, and radar. Just ask this family.

    Isn't she lovely? HW2.5 screenshot from Ingineerix video "Tesla Model 3 - Exploded?!?"

    If a Tesla Model 3 was made since April of 2019, it has the ~20x overall speedup of HW3 already. This retrofit for my 2018 Model 3 got its brains up to the same level as our 2020 Tesla Model 3. Remember, even folks who skip the optional, future, aspiration Full Self-Driving get to benefit from Tesla's accident-avoidance features, as mentioned above. It's not hard to imagine that a newer 20x faster purpose-built AI device churning through all that data will at some point help the car perform better in the real world, even with AutoPilot not engaged.

    Even though my wife's car will likely never get the FSD Upgrade since we use my 2018 LR AWD with FSD for long road trips, it's important to remember that that her HW3 based FSD Computer is always vigilant for her, whether she engage the included lane-keeping and/or cruise control automation functions or not. For now, I get some pretty fancy visualizations in what is essentially just a sneak preview of a future around-town driving automation feature, but I already noticed at least one apparent difference in driving behavior today. Read onward.

    Uh oh

    It's actually 2 computer brains on that HW3 Neural Net Processor board which is mounted alongside the MCU board, all inside one enclosure, dubbed buy Tesla as the "FSD Computer" assembly, inside a volume of space smaller than the human brain, cooled by circulated glycol.
    HW3 Neural Net Processor board

    When I first got back into my 2018 Tesla Model 3 VIN 119,XXX at Tesla of Milford Connecticut Service Center today, I closed the 2020.4.1 firmware release notes message and quickly noticed that my radio presets screen was on, but it had no stations listed. Not a good sign. I knew. Just in case something exactly like this was going to happen, I actually had my GoPro running, but my lapel mic had apparently failed so no audio was recorded as I then discovered my other settings like the odometers and lifetime kWh ratings were also all gone. Heart sank a bit. I looked around a little more, I noticed everything else was gone too, including:

    • Seat profiles
    • Phone as key and key cards
    • Recents and Favorites
    • Spotify logged out, which likely meant Netflix and YouTube logged out too
    Oh wait, why is the FM Favorites list blank, and why does my profile show as default "Profile"? I later noticed the odometer shows as Trip B 5.7 Miles, so it seems the service person who test drove the car for calibration knew my profiles were gone. It was time for me to stop camera, and to find somebody that could maybe help.

    Just then, my customer service representative walked by, so I nicely asked if he could come over and have a look. He's the same representative who checked my car in for service earlier this week, providing me with a loaner Model S. Back then, he had assured me that their HW3 installs were going well, and that my profiles shouldn't be lost, and because sometimes firmware would need to be pushed several times for it to work, I should expect the process might take overnight. That's why he kindly offered a loaner vehicle. They also had a bit of a backlog of service work to content with. No problem, no big trips planned for me this week anyway. Note, this Milford location is still the only service center in all of Connecticut, which is one of many challenges Connecticut owners uniquely face, but recently there are signs of progress.

    Now let's get back to today. Once he confirmed all my settings really were missing, he offered to take the car back into the shop right away, and apologized for the inconvenience. I thank him, then planted myself back in the waiting room. I know things go sideways sometimes, so I wasn't upset or anything, and I had brought some work to do with me just-in-case. I wasn't optimistic that my settings would be restored, and I had been informed weeks ago that settings could be lost in various forum posts and videos I had spotted, mostly by the early adopters who did their upgrades weeks or even months ago.

    I waited a mere 15 minutes or so, then heard a technician I hadn't met before calling my name, letting me know my car was ready already. That was quick! He then demonstrated that all was restored by showing me the display, and I quickly agreed. Even the list of WiFi networks were back. Nice! I thanked him, and we parted ways. While I was curious about why my stuff had been lost in the first place, I merely thanked him, and he headed back to his busy shop.

    The only side-effect of the brain transplant that remained for me to address was to Re-pair my Bluetooth phone for audio/calendar/messages, a quick and easy procedure that I resolved before hitting the road.

    Slight fan noise, tiny momentary gurgling heard

    As I sat in the car doing that Bluetooth re-pairing with my climate control set to off, things were very peaceful and quiet. I then noticed a quiet fan start up in the frunk area, then a very faint gurgling sound that bubbles make from the glove box area. This gurgle only lasted about 2-3 seconds, with the fan staying on for minutes. I figured this is all pretty normal, given they just swapped out a glycol-cooled computer which taps in to the Superbottle's recirculation system. Will only worry a bit I hear this again. I also know this new computer uses a few more watts, and maybe it's got some new-brain-related housekeeping to do, keeping itself a little extra busy.

    Calibration - already done

    Three minutes later, and I was ready to go. Pulling out of Tesla's driveway, I realized that there was no autopilot "Calibration in progress" warning on my display. That's odd, I thought to myself. I proceeded another minute or so to the on-ramp to Milford Parkway North en-route to Route 15 North/Wilbur Cross Parkway, and I was able to engage Navigate on Autopilot on the ramp. I still wasn't sure how that could be, with all other reports that I had read stating that at least a few miles of automatic recalibration are needed, just like when you get your new Model 3 and take that first drive home.

    I later went back into my TeslaFi records to check. I verified the car was left off with odometer at 27,759.74. Then spotted something peculiar on today's record, today, Feb 27 2020. I only moved the car about 50 feet to get it out of the way in the parking lot so I could get ready for my drive home. Yet, it shows 5.11 miles driven in 1 minute. I think that was just a data-catch-up of some sort. So yes, there was likely 5.91 miles of test driving, which would explain when the calibration happened. That's still a whole lot faster than it used to be, hardly a big inconvenience.


    Of course I later spotted all I needed to see right there on the service invoice, a 6 mile difference between the odometer reading on check-in versus check-out, pictured below.

    Still swinging wide

    Finishing an on-ramp, Autopilot swung a little wide for no apparent reason. The rest of the trip was good. Notice also the stalled loading of satellite maps despite plenty of LTE signal, easily fixed with a reboot.

    Entering a somewhat tight turn at the end of this same Route 15 on-ramp, my Model 3 went a little wide on the curve, getting close to the white lane marking. Nothing dangerous and not close to any other cars, with both of my hands on the wheel ready to intervene if needed. This sort of occasional behavior seems to be a minor regression that snuck in over the last month or two of software. Perhaps it was just 2020.4.1, I'm really not sure. I suspect it will just vanish in whatever software release comes out next, as I've witness minor regressions like this before. I've been eased through about 27 nearly-automatic firmware upgrades these past 14 months of ownership, and they all went pretty well, earning more of my trust over time.

    Traffic cones

    Sure looks like the new FSD Computer thinks an orange construction sign is an orange traffic cone, it's just a preview. The thing is, I hadn't turned Full Self-Driving Visualizations Preview yet.

    On that same on-ramp, I also spotted traffic cones on-screen to my right, rendered and positioned perfectly along the right side of on-ramp. I figured that perhaps my technician turned those visualizations, or that they're now on by default. I went to check a few miles later once the road wasn't busy and it turns out the Full Self-Driving Visualizations Preview slider wasn't set to on. That's curious, but it doesn't really matter. I turned them on, and thought to myself that I'll know if everything is rendering properly when I get to some surface roads to see if traffic lights, stop signs, and lane markings show up. I'd be there soon enough on this 44 mile trip back home.

    No ping-ponging

    High curvature detected message surprised me a bit, didn't seem that tight of a turn, and it stayed at a safe speed and dead-center.

    At highway speeds, all was well again, with my Model 3 staying at usual center of the lane, with only about 1 foot of deviation from the centerline max. This sure beats perhaps as many as +/- 2 feet with H2.5/2020.4.1. I'd characterize it as sloppy before, but not dangerous. Now with HW3/2020.4.1 it's returned to highway driving like a careful and attentive human. this is good, and I'm not alone in noticing this fix.

    I do have some GoPro footage of this that I hope to have time to get published at some point, but this has already been documented and shown elsewhere.

    No hanging out in the passing lane

    This is good, and significant. I really didn't like the HW2.5/2020.4.1 combo's affinity for camping out in the passing lane after passing other vehicles when Navigate on Autopilot was engaged, with no good reason for doing so. I'd routinely use the blinker stalk to politely evacuate that lane as soon as it was safe to do so. Now, with HW3.0/2020.4.1, that bad habit of lingering is completely gone, which was apparent to me within the first 15 miles of highway driving. Despite many conversations out there to the contrary, this improved by HW3 behavior is something dirtytesla reported and recorded 3 weeks ago, and my experience quickly seems to indicate dirtytesla was right.

    I do have some GoPro footage of this that I hope to have time to get published at some point, but this has already been documented.

    Satellite maps won't load, reboot fixed it

    I soon noticed that despite several bars of signal showing on the LTE signal, my satellite maps were not working. I had seen this before with my wife's 2020 Tesla Model 3 after an upgrade, rebooting the screen fixed it. Same thing today. I pulled off at a nearby rest stop, parked safely, restarted with the brake pedal/both thumb-wheel press-and-hold until Tesla T logo appears, and I was on my way just 2 minutes laster, with LTE signal showing, but data flowing too, with satellite maps coming right up. It's possible just a screen reboot would have done the trick to, avoiding the pit stop, not really sure. I wanted to avoid the distraction. The rest of the trip was uneventful, visualizations of traffic signals and stop signs were captured on camera, and the Autopilot function was working well.

    When I arrived home, to my surprise, HomeLink worked just fine. I then entered and exiting my garage repeatedly. Still worked fine. This was another nice surprise, given every report I had come across had mentioned that HomeLink would not work at all after the surgery, or would only partially work and would need to be reset. Mine didn't need either. Nice.

    WiFi - you'll need to provide your password

    Details below.

    Why were settings lost

    Why were the settings all gone in the first place? I thought about that on my way home. Here's my theory.

    In the Model 3, the Media Control Unit Version 2 (MCU2) and Autopilot ECU (Electronic Control Unit with dual CPUs) are in one enclosure, and this HW3 retrofit surgery replaces that entire enclosure. Details in references below. Only the Autopilot ECU is newer after the swap, but given the MCU2 was part of the assembly too, it stands to reason that all settings including "infotainment" would be gone, and the car would revert to factory default settings.

    My customer service representative had said he left my car inside plugged in and on WiFi last night, so that the scheduled software update he initiated would take effect. I later checked which version he meant, and confirmed that it was 2020.4.1. That's the very same software that my now-removed HW2.5 computer had when I left the car off.

    Why would I need 2020.4.1 again? Well, that's because I had a whole new brain. Perhaps that brain was sitting on a shelf for a few weeks in the parts department with a back-level firmware. Seems plausible, happens in the computer industry all the time. This new brain running older code then got installed into my vehicle. The busy technician triggered a restore of my settings, but maybe didn't wait around to see if they took effect. It could be that simple.

    Or, maybe they never had a chance. Perhaps any restore requires upgrading to the same level (or greater) than the level they were backed up from. You know, like an iPhone iOS restore to a new phone that requires you to first be at the same or (or greater) level as the backup before it will let you do a full restore. It's a decent theory.

    So hours later, in the pre-dawn early hours of today, 2020.4.1 was applied. Then I showed up later in the morning, but the settings were all gone. Had the technician done a restore of the settings after this last software update, seems likely everything would have been fine when I got there. I doubt I'll ever know for sure, and that's ok. No biggie.

    Maybe Tesla's internal documentation hasn't yet been refined or updated to include this information. Maybe it isn't getting read.

    What I am sure of is that some frustration felt by owners when their fresh-brained car is returned can be avoided. At least warn the customer if the patient is essentially brain-dead, and will need to be taught what you and your family's preferences are, all from scratch. Unless of course you're wrote everyting down. You did, didn't you? ;)


    I'm just glad everything works now, and that both of our Tesla Model 3 EVs should now behave identically when Autopilot functions are engaged, even though they were manufactured 14 months apart. This is a comfort thing for us, lessening any feelings of surprise makes the driving experience more enjoyable.

    Also note that it seems likely that the differences in Navigate on Autopilot behavior that I noticed could be explained away if different code from the same 2020.4.1 code base is running depending upon whether HW2.5 or HW3 is present. What's more significant is that future features that are more like Full Self Driving will require HW3 be present, and now my Model 3 is ready.

    Maybe this restore process is from some temporary laptop image, or from some private cloud. The cloud approach is said to be the way that Tesla is headed with profiles, something Elon said back in August of 2017.

    Any sort of backup, encrypted or otherwise, has some obvious security implications that I'll leave discussions about elsewhere, and are way out of scope for this already-too-long article. For my family, it would be nice if our profile could follow us to either of our two Model 3 cars, and only a secure cloud based approach could possibly make that happen. I don't think Tesla is quite there with "it would be nice" feature prioritization, but at least their pondering it. Seat positions, temperature selections, and all those other little preferences and settings. Much like iCloud backups do when you get a new iPhone, making it much easier to do, at least for identical model cars. How's that for a brand loyalty feature, buy a newer model of the same car, and your seat position and driving preferences are right there for you, just one authentication away and you're off.

    I realize a settings restore might not be possible for in all situations. It's also possible there are show stoppers I just don't know about. I also don't have any idea how long your data is held on to at the Service Center and/or the cloud. But it sure is worth at least asking Tesla Service if they can at least try to restore your data, particularly if you haven't even driving off the lot yet.

    Thank you for reading this article, hopefully you found it helpful. Feel free to drop a comment below, it will be very valuable information to all the other readers.

    There it is right there, 6 miles added to the odometer, apparently that's enough to complete the calibration. Note that it wound up taking from Monday to Wednesday right at closing time for my car to be done, so I picked it up Thursday. There were some other minor things they were having a look at while it was in service, the service shop was particularly busy. I really didn't mind, since I had a loaner car.

    Feb 28 2020 Update

    Reconnect to your WiFi

    Yes, just like your Bluetooth, your WiFi module was replaced as part of ECU2 module too. That means a new MAC address. So your home's router will likely give your "new" Tesla a new IP address.

    So, when I was back in my garage today, I went to double-check the new Additional vehicle information screen, and noticed this warning:

    Navigation Data Update available.
    Please connect to Wi-Fi to download the Navigation Data Update

    I needed to reconnect once I got back home. No problem, I just tapped on my isolated guest WiFi network and my Model 3 is back on WiFi. It took about 30 minutes to pull that nav data back down again, seems there's at an apparently capped speed of roughly 14 Mbps. I'm guessing Tesla Service doesn't have that kind of time and/or bandwidth, to wait around for such niceties. It makes sense that the latest navigation data was gone, I just hadn't thought about this until now. Now you know!

    For me, last week, both of our Model 3s were at:

    v10.2 (2020.4.1 4a4ad401858f)
    Navigation Data: NA-2019.20-10487

    My car returned from the shop with:
    v10.2 (2020.4.1 4a4ad401858f)
    Navigation Data: NA-2019.6-10236

    After the WiFi downloads were done, they're now back in sync again.

    Once the Navigation update completed, I noticed it then went right into "Downloading Game Update", also coming down at around 14 Mbps average. Yet another thing I doubt Tesla Service would care to wait around for.

    I'm thinking that these network contingencies are one of the factors reasons they're not widely offering these HW3 retrofits using Tesla Mobile Service, since WiFi and LTE are not necessarily available in good strength everywhere. Even better would be caching on a service technician's laptop with hot spotting, which I'd guess is their approach to doing at least the v10.2 software upgrade portion from mobile service or and/or at a Tesla Service Center.

    At left, navigation data download. At right, game update data downloading.

    Overall, this second big game update download only took about 10 minutes, and I'm all set now, it now displays the reassuring:

    Your car software is up to date

    Seems I'm completely done with this upgrade now, back to focusing on enjoying my next adventure, with some long trips coming up in the coming months.

    Feb 29 2020 Update

    Last night, I noticed that I did need to log in my streaming services under the Entertainment submenu. It wasn't possible to log in to Google for Google Maps in, or in YouTube, but the workaround is documented, just start with PLEX then you're all set, it's all explained in Browser error logging into Youtube.

    When producing the video and creating some screenshots from that video, I noticed that when my Model 3 was at factory defaults, the odometer actually showed Trip B 5.7 Miles. This could mean that it's likely the service technician test drove the car to let calibration finish and to make sure all was well, yet still didn't notice the loss of all settings and profiles, or maybe just forgot to restore them.

    To make this article a lot clearer, I've added a checklist section above that should be helpful to anybody picking up their post-surgical HW3 Model 3.

    Mar 01 2020 Update

    Changed title from:
    Model 3 HW3 FSD brains replacement caused temporary amnesia but Tesla quickly restored all settings, Navigate on Autopilot behavior improved too
    Model 3 HW3 brain replacement caused temporary amnesia but Tesla quickly restored all FSD Computer settings, Navigate on Autopilot behavior improved too

    Mar 02 2020 Update

    Changed title from:
    Model 3 HW3 brain replacement caused temporary amnesia but Tesla quickly restored all FSD Computer settings, Navigate on Autopilot behavior improved too
    Model 3 HW3 brain replacement caused temporary amnesia but Tesla quickly restored settings, Autopilot improvement demonstrated with new FSD Computer

    Mar 05 2020 Update

    A bit surprised by a strange bug noticed on 2020.4.1 with HW3 yesterday on the highway. I was taking an exit to check on some Supercharger construction progress, and my right blinker wouldn't disengage, as I slowed down on the exit ramp. Gladly, there was nobody behind me. I moved the stalk up, back to middle, down, and it just kept on right-turn blinking. After about 20 seconds the issue resolved itself, no need to reboot. No more blinking. Left blinker then worked to take my next turn. This sort of operational control failure has never happened to me before, notating it here in case others have the same thing happen to them. Probably won't matter, as 2020.8.1 is starting to roll out soon anyway. Very excited about this company CEO's ability to listen to feedback, with the awesome fix for Bluetooth constantly taking hold of my phone audio when loading or unloading either car, Tesletter explains:

    Bluetooth improvements. Bluetooth now connects to the paired phone only after sitting in the driver’s seat and all doors being closed. This is a cool idea, I’m looking forward to seeing how it actually works.

    Mar 06 2020 Update

    For TeslaFi users, you should go into Settings, Autopilot Hardware, and enter in some notes. Thanks to MarcG for this tip on TMC Forums!

    Be sure to Save, then fill out notes, then Submit.

    Mar 20 2020 Update

    One of many graphs by Enginerd at TMC Forums, click to visit source article with full resolution image.

    I've found a wonderful thread in the TMC forums by Enginerd Navigate On Autopilot: automatic lane change results, check it out! Some serious data analysis, and great summary too. It sure looks like I'll be quite happy with upcoming 2020.12 software on my HW3.

    Here's some other profiles settings loss stories out there:

    1. @TeslaCanuck's story
    2. @tesla_raj's story
    3. @MFrunker's story

    sure wish I knew to warn them before they went for their upgrade!

    I added their videos to growing list below, and I also left comments below their videos or via twitter, so they can hopefully let others they know before they go.

    It is also becoming apparent things don't always go right, see @TeslaCanuck's tweet about a strange persistent and annoying rubbing noise, and stories about glove boxes not aligning or releasing properly after the upgrade. All the more reason to run through my checklist above before you drive away.

    Pretty safe to say this settings restore thing isn't a time issue. Mine only took an additional 15 minutes, and according to Mad Hungarian @IanPavelko's tweet, his whole HW3 upgrade procedure took just 2 hours 15 minutes and his settings were preserved!


    May 03 2020 Update

    If you haven’t thought about what happens to your old infotainment computer after your replacement, you may want to see @greentheonly’s [tweet]:

    Bad news Sunday. If you had infotainment computer in your Tesla replaced (model3 FSD upgrade, mcu2 retrofit, mcu1 emmc fix or any other fixe requiring computer swap) - consider all accounts you logged into from the car compromised and change pwds.

    along with the [insideevs article](

    MAY 05 2020 Update


    JUN 09 2020 Update

    Added this tip to the article above.

    Changed article title from:
    Model 3 HW3 brain replacement caused temporary amnesia but Tesla quickly restored settings, Autopilot improvement demonstrated with new FSD Computer
    Model 3 HW3 brain replacement can cause temporary amnesia but Tesla Service can quickly restore your settings, all you need to know before you go

    JUN 09 2020 Update

    Added this tip to the article above.

    Jul 11 2020 Update

    Added a new video below.


    Free Supercharging: If you find this article of value and decide to order a Tesla, please consider using this referral link when placing your order so you and I both get 1,000 miles of free Supercharging. If you order Solar, it's a $250 award after system activation.

    Disclosure: My family owns no stock in Tesla. Tesla doesn't advertise at TinkerTry, or anywhere else, and this is not a sponsored post. We financed the purchase of two Tesla Model 3s, replacing my 2006 Honda Civic Hybrid in December of 2018 and replacing my wife's 2005 Honda Civic EX in December of 2019. These big moves to an all electric household were an expression of our mutual desire to go green, avoid gasoline, be safe, have fun, and save money in the long run. Mostly for my job, I drive a lot, 25,000 miles in 2019 for example, and I thoroughly enjoy sharing what I've learned with you. I hope you can tell!


    All Tesla related videos:

    TinkerTry YouTube Channel - Feb 27 2020 - Model 3 amnesia after HW3 install but Tesla restored everything & Navigate on Autopilot is improved

    At this spot in the video below, I mention no ping ponging, right after demonstrating excellent lane centering/lane keeping.

    TinkerTry YouTube Channel - Jan 07 2020 - 2020 Tesla Model 3 SR+ HW3 2019.40.50.7 visualizations / GoPro HERO8 Black 4K/60 fps HyperSmooth 2.0
    model3man - Jul 11 2020 - My FIRST Tesla Full Self Driving RIDE [after HW3.0 and FSD Purchase]

    You can see the HW2.5 for FSD in this video.

    Ingineerix - Feb 16 2018 - Tesla Model 3 - Exploded?!?

    Tesla Raj's upgrade apparently went much like mine, noticing the loss of odometer and his other settings, mentioned near the end of this video. I reached out to him anyway, just in case. I'm sincerely hoping this article can spare others similar grief.

    Tesla Raj - Feb 28 2020 - Everything you need to know about Tesla HW3
    Tesla Canuck - Mar 06 2020 - Tesla Model 3 Full Self Driving Computer UPGRADE! [What to Expect]
    Mother Frunker - Mar 20 2020 - How To Get FSD Hardware 3.0 Upgrade Quicker | Tesla HW3 Upgrade Experience



    See also at TinkerTry

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