BMW E31 Upgraded lower ball joint bushing (Set of 4) Old BMW Part number for reference: 33321135131

There is a very well known longevity issue with the original E31 BMW Lemforder supplied ball joint bushings. The plasticky transparent material used in the original bushing boots does not hold up to the elements, it cracks very quickly, dirt gets into and destroys it .

I was absolutely floored to see almost every rear OEM ball joint bushing torn on my 59k mile 850ci ONLY 5 years and just 6k miles after a complete rear subframe refresh!

We used proven polyurethane rubber in the upgraded ball joint that will stand up to elements for decades! This ball joint bushing is designed from scratch using highest quality materials to handle the E31 weight application and perfectly matches OEM dimensions for plug and play installation .