I can confirm my new Chenming seal is leaking. Sensor is wet after about 300 miles but doesn't seem to be leaking at a high volume. No fluid in the motor or inverter, and nothing came out of the drain bolt I drilled next to the sensor. The search for a better seal continues. @Boxster EV - Any update...

Does anyone know the size of the O-ring on the drive unit speed sensor? I don't see the ring itself listed in the Tesla or MB parts diagrams. Mine was torn when removed.

Edit - it appears to be a 24mm ID, 2mm thick O-ring.

Which one did you order? Did it come in the manufacturers box with a part #? I have been eyeing these two. Both ship from Ukraine but different sellers and different cities https://www.ebay.com/itm/255414332627?hash=item3b77e16cd3:g:micAAOSw06dh~sJH https://www.ebay.com/itm/363912238070?hash=item54...

The rotor did NOT want to come out. How did you get the rotor out? Did you open the gearbox, remove gear shafts, and hammered the spline end? Did you soak the rotor in rust remover of so? I sprayed some contact cleaner in-between the rotor and housing in a few spots. There is a small lip on the rot...

Speaking of seals, have any of you seen these? Seems like Tesla themselves have been trying these multi-lip seal designs. The bearings and new seals I bought on eBay came from Kiev, Ukraine where this shop seems to be too. https://stock-tesla.com/en/index.php?route=product/product&product_id=219...

While I'm not building a custom car, this thread has been an incredible help for me. So I figure I'd chime in with my experience. I picked up a lightly wrecked 2014 Model S 85 recently and immediately noticed some "bucking" at very low speed. Pulled the speed sensor and it was similarly we...