Front struts/shocks on the E46, E82, E9X, E60, E63, E83 are mounted to the chassis with this front upper strut mount. It's a dense rubber mount that also incorporates a bearing that allows the strut to rotate as the steering changes. Over time the rubber breaks down and the bearing wears out and the entire mount should be replaced.
31336760943 vs 31306775098 strut mounts. BMW listed both part numbers over the course of E9X production. The 943 is most commonly associated with standard suspension while the 098 is most commonly linked to M Sport/Sport suspensions (although there are exceptions). Visually and geometry-wise they are identical. BMW originally used aluminum for the 943 housing while the 098 used steel. This Rein part replaces 31336760943 and has an aluminum housing. The alignment pin is cast into the housing.
This is a OEM-spec E46, E82, E9X, E60, E63, E83 strut mount manufactured by Rein (CRP) Automotive - an original supplier to BMW for many steering and suspension components. As an OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.
BMW Fitments:
1 Series
E82 / E88 (08-13) > 128i
E82 / E88 (08-13) > 135i N54 (08-10)
E82 / E88 (08-13) > 135i N55 (11-13)
E82 / E88 (08-13) > 135is N55 (11-13)
3 Series
E90 / E91 / E92 / E93 (06-13) > 325i
E90 / E91 / E92 / E93 (06-13) > 328i
E90 / E91 / E92 / E93 (06-13) > 330i
E90 / E91 / E92 / E93 (06-13) > 335d
E90 / E91 / E92 / E93 (06-13) > 335i N54 (07-10)
E90 / E91 / E92 / E93 (06-13) > 335i N55 (11-13)
5 Series
E60 / E61 (04-10) > 525i M54 (2004-2005)
E60 / E61 (04-10) > 525i N52 (2006-2007)
E60 / E61 (04-10) > 528i
E60 / E61 (04-10) > 530i M54 (2004-2005)
E60 / E61 (04-10) > 530i N52 (2006-2007)
E60 / E61 (04-10) > 535i
E60 / E61 (04-10) > 545i
E60 / E61 (04-10) > 550i
6 Series
E63 / E64 (04-10) > 645Ci
E63 / E64 (04-10) > 650i
X3 Series
E83 X3 (04-10) > X3 2.5i M54 (2004-2005)
E83 X3 (04-10) > X3 3.0i M54 (2004-2006)
E83 X3 (04-10) > X3 3.0si N52 (2007-2010)