Genuine BMW Additional Shock Absorber, Front - 31336778545 - E85
Genuine BMW # 31336778545
Specific Fitment Info:
1999-2006 E46 323i/325i/328i/330i (except Xi) with more than 2" of lowering
2003-2008 E85/E86 Z4 2.5i/3.0i/3.0si with M Sport suspension or aftermarket lowered suspension
The bump stop is a stiff foam block that slides over the shaft of your front strut or rear shock. Under full compression the bump stop prevents the shock from completely bottoming-out, causing damage to the shock or to the chassis. In other scenarios the bump stop can actually play an active role in the handling and stiffness of the car. Because of their placement, bump stops are subjected to debris, moisture, and heat and this can degrade its performance or cause it to fail completely. BMW insists on new bump stops any time a new shock is installed on a car*.
* - many aftermarket performance shocks like Bilstein or KONI will come with their own bump stops and new ones are not required. This does not apply to any Bilstein or KONI or other brand marked as "OEM".
This bump stop was originally designed for E85/E86 Z4 with the optional M Sport suspension package. The limited travel of that suspension called for a shorter and stiffer bump stop. This makes it a great choice for other lowered Z4s or E46 3-series models and is preferred over cutting and shortening an existing bump stop.
This is a Genuine BMW bump stop with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.
E46 (99-05) > 323Ci
E46 (99-05) > 323i
E46 (99-05) > 325Ci
E46 (99-05) > 325i
E46 (99-05) > 328Ci
E46 (99-05) > 328i
E46 (99-05) > 330Ci
E46 (99-05) > 330i
E85 / E86 Z4 (03-08) > Z4 2.5i M54
E85 / E86 Z4 (03-08) > Z4 3.0i M54
E85 / E86 Z4 (03-08) > Z4 3.0i N52
E85 / E86 Z4 (03-08) > Z4 3.0si N52