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E36 / E46 Differential Cover Bushings




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Have you have ever been in your E36 or E46 and as you release the clutch from a dead stop heard and felt a loud “thud” coming from the rear of the car? This is a sure sign that your differential mounting bushings are worn out or failed. If you speak in BMW part numbers, then that's 33171134872. These mounts will help eliminate the slop and play in the differential mounting. This equates to better power transfer to the ground and a more secure feeling in the rear of your car under hard use.

Price is for a pair (2 units). Enough to do 1 car.


- 1992-1999 E36 (NOT TI)
- 2001-2006 E46 M3
- 2007-2008 Z4 M

Should I use POLY or DELRIN for my diff bushing?

We have this diff bushing available in 80a (soft poly), 95a (hard poly) and full-on Delrin. The stock front diff bushings are meant for comfort. It's meant to be quiet, so BMW allows for a little bit of movement for the sake of comfort. However, this design can fail under normal street use (and age) let alone any kind of performance driving. So we have the perfect solution. 80a soft poly is for that OEM + feel. That means you want a subtle upgrade for your street car without too much of a compromise in comfort, these are a happy medium. 80a are designed for the street enthusiast. 95a is great for dual purpose aggressive street and track applications. Delrin bushings are generally best for race applications only.