If someone makes a mcu failure poll, I will respond.
Model S 85 2013, almost 114k miles, MCU needs replacing due internal short according to Tesla.
Had my Model S since 03/2013, drove it exclusively until I bought an X in 12/2016 and let my brother inlaw and spouse drive the S.
The X car window got broken into 10/16/17, so started driving the S again.
On 10/17/17, I decided to read the Manual to look at what Passive Entry was. Touched the Manual and the touchscreen went blank and restarted itself. I tried about 2 times and both times screen just restarted. Decided to leave alone and try the next day.
10/18/17, I decided to search something on the browser. Nothing was working, no indication of response on the browser. Tried the Manual again and it still wasn't working and decided to do a scroll reset. After the scroll reset, AC turned back on, but the touchscreen never came on.
Eventually called Tesla and they couldn't help me with anything except to take the car in the next day.
AC stayed on at least 10.5 hours, and had turned off sometime in the middle of the night. Not sure if it was because the car had finished charging, or maybe some overheat protection turned it off.
10/19/17
Because my car was out of warranty, I specifically asked them how much it would cost worst case scenario. Person did a little searching on the computer and was quoted $200 deductible, otherwise $500. In hindsight, I should have asked them why I only needed to pay the deductible, my car was over 100k miles already. I figured $500 sounds fine even if out of warranty.
10/20/17 Friday at 8:34 am, I get a message:
Hi A, we diagnosed the problem with your Model S and are working on an estimate to repair it. The cars warranty expired at 100,000 miles. There is no warranty left on the car except for the drive unit and battery pack. We will be in touch later today. Hit reply or call (916) 652-7740
At 10:06 am, I texted requesting what the diagnosis was.
I never received an update.
On 10/25 around 2pm, I asked them for a status update because I could see that my car was sitting here and not charging. The car had around 70 miles.
Around 2:30, I receive a message that "Parts are on order. We will notify you when they come in. Thank you."
5 minutes later I responded, "What's the estimate to repair it, and what parts are on order?"
Then around 6pm I get, "Hi A, this is B with Tesla service Rocklin, we diagnosed the problem with your Model S and we just sent you an email with the estimate cost on repairs. Please review email and let us know if you have any questions. Thank you!"
I read the email and was pretty much in shock at the price I was quoted. I've just never had to pay that much of an amount on a car at one time. It was going to cost $2588 for the MCU. Labor was $175 plus tax. The email stated they would pay for labor if I paid for the part. Maybe it was a consolation because my warranty had expired.
10/26/17 called to talk to them.
10/27/17 emailed them to go ahead and fix the mcu.
10/31, get a text that my car is ready to be picked up.
I was just mainly upset that it cost so much just for AC function. If only I hadn't reset the car, the car likely would have continued operating as is. I just wouldn't have access to Manual and the web browser. I really believe the software updates messed up my car. I had a main charging unit(?) that needed replacement right after a software update. Car charged fine, but updated the car in the morning, and by night time during its scheduled charge time, my phone received so many messages of charging error that my phone battery was drained in the middle of the night. Thankfully I had enough charge to reach the service center. It was under warranty, so thankfully did not have to pay out of pocket.
Just annoying when things break and I suspect it's due to the software updates, but Tesla says they cannot confirm it, or does not want to disclose it. Maybe the mcu really did break not due to software upgrade, but 4 years old only and have to spend so much at one time....
I still choose EV over ICE cars though....
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And still waiting for Tesla to have window in stock to fix the X window.
