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Tesla knows MCU with eMMC Fix Still has Problems (we need NHTSA to force the fix)

SilverUnicorn

Member
May 24, 2016
49
35
New York
I have Model X 2016 90D AP1 and my MCU failed which ended up immobilizing the car (Tesla said this should not have happened but it did) which required a flat bed tow (their cost) to a nearby Tesla service center. At that time, Tesla replaced the MCU eMMC on Sept 3rd 2020. Since this part has been replaced, the backup safety camera and other functionality (e.g. navigation, user interface access) will become non-functioning frequently. This can be non-functioning for a few seconds to a few minutes. Sometimes the backup safety camera will freeze the object on screen and not move, be solid black, or not even show the backup camera (I provided Tesla service examples of the solid black and the lack of backup camera view while the X is in reverse). Overall the hardware "fix" has caused MORE issues than before the failure. I also have an extended Tesla warranty, and Tesla will not replace this more problematic MCU w/eMMC fix with a MCU1 (I tried to get a new MCU1) or MCU2 since Tesla classifies this as a "performance" related issue. So, Telsa offered me 2 options:

1) I wait an unknown period for an unknown software fix. It has been almost 4 months and there's been no fix.
2) I pay $2500 to fix my backup safety camera which Tesla confirmed fixes the problem.

Tesla Service confirmed in writing that the corporate policy is to take the cheaper approach which is to have the customer wait. I provided this messaging in the NHTSA complaint I submitted today (see it attached too). I STRONGLY recommend people file complaints. File a Vehicle Safety Complaint | Safercar.gov | NHTSA

P.S. I love Tesla and own 2 of them, but this is unacceptable.
 

Attachments

  • Tesla Service has known hardware fix but does not want to spend money to fix.pdf
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MP3Mike

Well-Known Member
Feb 1, 2016
15,392
33,415
Oregon
The NHTSA requirement to have a backup camera doesn't apply to your vehicle. That went into effect in March of 2018, exactly the time that Tesla switched to putting MCU2s in vehicles. (Coincidence?)

NHTSA has already moved from a PE to a EA investigation, so I don't know that any more complaints will make a difference. (Though they certainly won't hurt.) But I wouldn't expect anything to come from them for another year or so. (Though maybe they will surprise me, it only took them 5 months to go from PE to EA on this issue, while other PEs that are 4 years old still haven't been decided on.)
 
Last edited:

SilverUnicorn

Member
May 24, 2016
49
35
New York
The NHTSA requirement to have a backup camera doesn't apply to your vehicle. That went into effect in March of 2018, exactly the time that Tesla switched to putting MCU2s in vehicles. (Coincidence?)

NHTSA has already moved from a PE to a EA investigation, so I don't know that any more complaints will make a difference. (Though they certainly won't hurt.) But I wouldn't expect anything to come from them for another year or so. (Though maybe they will surprise me, it only took them 5 months to go from PE to EA on this issue, while other PEs that are 4 years old still haven't been decided on.)
Thanks, this is good to know. I found the Engineering Analysis (EA) document from NHTSA you mentioned. Amazingly there are no crashes with the rear camera failures. I wonder how a "crash" is classified.
 

ddrmr

Member
Feb 1, 2019
17
18
Shreveport, LA
I have Model X 2016 90D AP1 and my MCU failed which ended up immobilizing the car (Tesla said this should not have happened but it did) which required a flat bed tow (their cost) to a nearby Tesla service center. At that time, Tesla replaced the MCU eMMC on Sept 3rd 2020. Since this part has been replaced, the backup safety camera and other functionality (e.g. navigation, user interface access) will become non-functioning frequently. This can be non-functioning for a few seconds to a few minutes. Sometimes the backup safety camera will freeze the object on screen and not move, be solid black, or not even show the backup camera (I provided Tesla service examples of the solid black and the lack of backup camera view while the X is in reverse). Overall the hardware "fix" has caused MORE issues than before the failure. I also have an extended Tesla warranty, and Tesla will not replace this more problematic MCU w/eMMC fix with a MCU1 (I tried to get a new MCU1) or MCU2 since Tesla classifies this as a "performance" related issue. So, Telsa offered me 2 options:

1) I wait an unknown period for an unknown software fix. It has been almost 4 months and there's been no fix.
2) I pay $2500 to fix my backup safety camera which Tesla confirmed fixes the problem.

Tesla Service confirmed in writing that the corporate policy is to take the cheaper approach which is to have the customer wait. I provided this messaging in the NHTSA complaint I submitted today (see it attached too). I STRONGLY recommend people file complaints. File a Vehicle Safety Complaint | Safercar.gov | NHTSA

P.S. I love Tesla and own 2 of them, but this is unacceptable.

After I complained about the continual rebooting of the display at the driver's side and frequent blank large screen (for several minutes) I was told by the service center that it is a "...known firmware problem" and a fix has not been developed as yet. At first they asked me for exact times of incidents (which I had not recorded). So I began logging dates and times, then they gave me the "known hardware" line.
 

dmurphy

Woof.
Dec 7, 2018
3,479
4,687
New Jersey - Morris County
Amazingly there are no crashes with the rear camera failures. I wonder how a "crash" is classified.

I wouldn’t expect there to be, honestly. The way the MCU is failing, I’d expect the rear camera to just fail to engage, and not drop out mid-backing up. So if that’s the case - it fails to engage - I’d think the driver would instead start backing up using their Mark I eyeballs.

I know we live in a technology cocoon, but backing up using eyeballs is a pretty important skill.
 

doghousePVD

My grandfather’s car
Dec 3, 2018
587
472
New England, USA
I’m having a lot of software issues the last few day

2020.47.30, 2018 100D

GPS stopped reporting position for hours. Map appeared as normal. Rebooted multiple times (2 finger, 4 finger brake, total menu off). VERY long time to return from reboot, several minutes to 15 minutes every time. Also the side cameras stopped working.

This was my first day towing a new travel trailer (sub freezing weather) so so very annoying since energy calculations ceased, too. Browser (ABRP) very very slow even with good reception, WiFi, etc.

Today cameras and GPS returned. While driving all screens went black. After waiting a few minutes black, did 4 finger reboot and several more minutes later came back.

Roadside service said they couldn’t do anything. 877 service said they couldn’t see anything wrong. He said he sent a GPS reset but not sure it happened. The problems persisted for 24 hours after my conversation.

Suggestions?
 

bumpersignal

Member
Sep 12, 2020
16
3
SoCal
They need to get spanked before they do the right thing.

Speaks volumes about their leadership.

100%. I used to drink the KoolAid but I've lost my taste for brand loyalty to Tesla. I will likely buy another Tesla sometime in the future, until the competitors catch up. When those competitors catch up to feature parity (along with charger availability) , I will likely choose the competition every time if they're a major established car brand. They're getting away with treating their customers like this in the short run because they can, but mark my word. This will come back to bite them in the long term.
 

brkaus

Well-Known Member
Jul 8, 2014
7,722
6,253
Austin, TX
100%. I used to drink the KoolAid but I've lost my taste for brand loyalty to Tesla. I will likely buy another Tesla sometime in the future, until the competitors catch up. When those competitors catch up to feature parity (along with charger availability) , I will likely choose the competition every time if they're a major established car brand. They're getting away with treating their customers like this in the short run because they can, but mark my word. This will come back to bite them in the long term.

I haven’t been treated like royalty by BMW (my first M3, plus several others) or Acura (or Dodge).

Didn’t really expect to be treated like royalty by dodge, but the not-so-bright service rep was standing by my running 1993 Cummings diesel and didn’t know it was a diesel.
 
  • Funny
Reactions: Fiddler

bumpersignal

Member
Sep 12, 2020
16
3
SoCal
I haven’t been treated like royalty by BMW (my first M3, plus several others) or Acura (or Dodge).

Didn’t really expect to be treated like royalty by dodge, but the not-so-bright service rep was standing by my running 1993 Cummings diesel and didn’t know it was a diesel.

6594a3de132fb040efd0ab9655bd5d12.png
 

Abrasha

Member
Oct 10, 2020
12
-1
San Francisco
So, Telsa offered me 2 options:

1) I wait an unknown period for an unknown software fix. It has been almost 4 months and there's been no fix.
2) I pay $2500 to fix my backup safety camera which Tesla confirmed fixes the problem.

Tesla Service confirmed in writing that the corporate policy is to take the cheaper approach which is to have the customer wait. I provided this messaging in the NHTSA complaint I submitted today (see it attached too). I STRONGLY recommend people file complaints. File a Vehicle Safety Complaint | Safercar.gov | NHTSA

P.S. I love Tesla and own 2 of them, but this is unacceptable.

I have had the same issue intermittently for 2 1/2 years now with my model 3. I will now finally file a complaint with the NHTSA, because backup cameras have been a requirement in new cars since 2018. Tesla's backup camera in my car is unreliable at best.

https://www.cnbc.com/2018/05/02/backup-cameras-now-required-in-new-cars-in-the-us.html
 

SilverUnicorn

Member
May 24, 2016
49
35
New York
I wouldn’t expect there to be, honestly. The way the MCU is failing, I’d expect the rear camera to just fail to engage, and not drop out mid-backing up. So if that’s the case - it fails to engage - I’d think the driver would instead start backing up using their Mark I eyeballs.

I know we live in a technology cocoon, but backing up using eyeballs is a pretty important skill.
The camera isn’t failing in that way for me. Sometimes it’ll freeze the image on the screen. So I’ll think the driveway is empty and back out and it’s a frozen day before image. Serious. I’ve learned to check the image as I back up to insure it’s moving. That’s pretty dangerous.
 

rush6410

Member
Sep 26, 2016
631
603
Montgomery TX
I have Model X 2016 90D AP1 and my MCU failed which ended up immobilizing the car (Tesla said this should not have happened but it did) which required a flat bed tow (their cost) to a nearby Tesla service center. At that time, Tesla replaced the MCU eMMC on Sept 3rd 2020. Since this part has been replaced, the backup safety camera and other functionality (e.g. navigation, user interface access) will become non-functioning frequently. This can be non-functioning for a few seconds to a few minutes. Sometimes the backup safety camera will freeze the object on screen and not move, be solid black, or not even show the backup camera (I provided Tesla service examples of the solid black and the lack of backup camera view while the X is in reverse). Overall the hardware "fix" has caused MORE issues than before the failure. I also have an extended Tesla warranty, and Tesla will not replace this more problematic MCU w/eMMC fix with a MCU1 (I tried to get a new MCU1) or MCU2 since Tesla classifies this as a "performance" related issue. So, Telsa offered me 2 options:

1) I wait an unknown period for an unknown software fix. It has been almost 4 months and there's been no fix.
2) I pay $2500 to fix my backup safety camera which Tesla confirmed fixes the problem.

Tesla Service confirmed in writing that the corporate policy is to take the cheaper approach which is to have the customer wait. I provided this messaging in the NHTSA complaint I submitted today (see it attached too). I STRONGLY recommend people file complaints. File a Vehicle Safety Complaint | Safercar.gov | NHTSA

P.S. I love Tesla and own 2 of them, but this is unacceptable.
The emmc is a daughter board on the MCU. So, if they replaced the MCU, the emmc was replaced. I can't imagine they would reuse the emmc on a refurbished MCU installment. I would think this far along they are only refurbishing MCU1s. I am sure they are not getting new ones built. That can be pretty sketchy.
 

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