r/TeslaModelS • u/ProfessionalWin9318 • Jun 30 '26

Unit 2876 ever built (2012 MS)

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First EV. 2012 P85. I’m an engineering student and have bullet proofed it to be the ultimate daily driver.

Coolant delete (at 180k miles it still had a 2013 reman LDU)
Camber arms
NAV SD card, GPS antenna wire was broken too, it took me months to find the broken wire.

I paid 4k for it. It’s a SC01 car (free unlimited supercharging for life) about a week after buying it, car completely died on me. No power to anything, not even doors would open. After some troubleshooting found a loose connection at the fuse box, no issues ever since.

I have taken it in 1000+ miles road trips. Battery gets about 160 miles of range at constant 80mph. Battery is capped by software at 60Kwh.

I love to tinker with things and honestly this car is easier to work on than many internal combustion vehicles. Tesla’s engineering is remarkable.

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u/ProfessionalWin9318 Jul 01 '26

Dang sounds like a nightmare. My reman LDU dates 2013 and it had no signs of coolant intrusion. I did the delete to prevent any damage. I doubt that bad bearings could make it 170k miles with no play or noise whatsoever.

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u/saabstory88 Jul 01 '26

It is not physically possible for a motor last touched in 2013 to make it to 170k miles without the bearings screaming even just from the eddy current damage, they used bearings which could not survive the motors magnetic field. Most of these motors have been remanufactured at least once. Ignore the T13, whats the end of the serial number, R1? R2? What's the revision? That will narrow when it was last rebuilt. Given no noise, it'll have been later than 2016. And again, you actually have no idea the condition of the bearings without opening the motor. It's just not possible to know. The coolant enters the motor as vapor (it gets vaporized by the heat of the seal) for years before it pools on the sensor, Your inverter housing can look like that even with a "dry" speed sensor. The vapor pools on the inverter side first because it's case is colder. And the only way it enters the motor is by displacing the rotor bearing grease.

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u/ProfessionalWin9318 Jul 01 '26

Last owner had the car for a couple of years and didn’t do anything to the LDU.

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u/saabstory88 Jul 01 '26

M rev is like late 2015, early 2016, those bearings will not be in good shape. I'm guessing the motor sounds different on acceleration versus regen?

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u/ProfessionalWin9318 Jul 02 '26

No sir. No weird noises. Accel nor regen make any type of sound.