Pinion bearing, as a mechanical element of automotive differentials, constrains the movement of a pinion. When you turn your BMW car, pinion bearing allows connected wheels to rotate at various speeds to finish the best turning. As one part of steering system, it is closely related to steering. So when you feel something wrong when you turning your BMW, like some weird voice of difficulty turning, there is a chance that your pinion bearing goes wrong. For you and your family's safety, you are supposed to make sure your BMW is in the good situation. Your BMW to you is like a family member to you and you do care about him no matter he is young or old. And we treat you sincerely since we know your BMW matters to you and you matter to us. All we offer is BMW genuine OEM pinion bearing with a shocking cheap price.