Powerflex PFR5-4621 Rear Differential Front Bush - BMW E46 M3

Single replacement bush for the front mounting position of the BMW E46 M3 rear differential. Powerflex PFR5-4621 is separate from the two rear mounting bushes. Choose the Road Series or PFR5-4621BLK Black Series variant.Identify the correct differential mountingPowerflex specifies the E46 M3 application using original BMW references 33172282484 and 33172229782. This is not a universal bush for every E46 3 Series. Cars with a changed differential or carrier need their installed mounting arrangement checked individually.One bush, one front mounting positionThe displayed price is for one bush assembly, matching the manufacturer's stated vehicle quantity. Front refers to the forward mount on the rear differential, not a front-axle differential or front suspension component. Complete brackets, subframes and rear mounting bushes are not included.Complete the E46 M3 differential mounting refreshPair this front mounting choice with the separately sold PFR5-4620 rear differential rear bush pair when both areas require renewal. Confirm each part by its mounting position rather than ordering several bushes simply labelled differential mounts.Installation and road useRoad Series and Black Series are selectable catalogue specifications with their own SKUs. Black Series is positioned for track and motorsport use. Changes to mounting stiffness may make drivetrain noise or vibration more noticeable. Diagnose the cause of knocking before assuming one bush will resolve it.Follow the Powerflex instructions and inspect adjacent mounts. Browse the Powerflex range. Confirm the chassis and original components before purchase; there is no blanket fitment guarantee.