MCU Failures
Is anyone tracking MCU failures like they are tracking Updates? It would be really interesting to know how many MCUs have failed. What age they failed at, years and miles? What was the cause of the failure, i.e. was it the logging memory chip?
I suspect Tesla knows but probably would not tell us.
Also I wonder how many FSD cars were purchased along with how many are MCU 1, AP 2.0, 2.5 and 3.
I suspect Tesla knows but probably would not tell us.
Also I wonder how many FSD cars were purchased along with how many are MCU 1, AP 2.0, 2.5 and 3.
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About 330,000 model S and X were made with MCU1.
So the failure rate is 250/330,000 = 0.075%, a fairly small number over 8 years, although some MCUs are newer than others.
We have no data on the nature of the failure, as that's internal to Tesla. The memory chip that seems to fail on some MCUs is used for storing the software code, settings, logs, and other information. I did an analysis in another thread that shows the logging is unlikely to cause the failure of the chip, despite many unknowingly saying logging was the cause. With all the new features added over the years, and especially AP, it may push the chip to its limits and cause some early failures. Failure causes are mostly conjecture so be cautious about coming to any specific conclusion.
I understand what the OP’s intentions are, but this is yet another thread about this which just leads into my example above.
As for the number of failures, let's take a WAG it's 10 times my first estimate or 2,500 units. That's a 0.75% failure rate. Still fairly low over 8 years of production. Still, it sucks when any expensive part fails, but I don't see Tesla providing replacements for free out of warranty.
I know someone who had a boss that owned an Audi L8. It was $1,500 just to replace the thermostat due to everything that needed to be removed and re-assembled.
It was the memory that went bad/corrupted. So sad that a $70k+ car needs this kind of work after 4 years. I really don't care about comparing ice cars; I didn't purchase one, so why should I feel better about comparing repair costs? Maybe we start comparing repair costs to the few other EV vehicles.
Did they give you an MCU1 or an MCU2?
brdinjd
You must have had something else done, because MCU1 prices don't vary from state to state. I just contacted my mobile tech and was told it's the same price across the country unless something else needed to be done to the car.
2015 85D Mine failed in June of 2019, at around 72,000 miles. $2400
It was the memory that went bad/corrupted. So sad that a $70k+ car needs this kind of work after 4 years. I really don't care about comparing ice cars; I didn't purchase one, so why should I feel better about comparing repair costs? Maybe we start comparing repair costs to the few other EV vehicles.
I don't have issues comparing to other EV vehicles. the Nissan leaf a friend (also owns an 85d) owns had to replace his suspension system for 2500 @ 55k miles and he's also down on his range by 40%. He the got quoted over $2k to replace his charge port a few miles later.
repairs include:
steering u-joint (combined with rear toe links) $962
rear toe links
1 front air shock $883
parking brakes (I did that myself) $500 for parts
1 tie rods - $216
wiper pump $38
I've saved tons driving my car and would not bitch at all if the screen failed like my friend did daily!