Powerflex Polyurethane Bush kit for BMW E36 3 Series (1990 - 1998) Rear Diff Rear Mounting Bush - PFR5-326 - This fits all models including all M3 models and replaces OE number: 33171134872. - Bush Size: - PRICE IS PER CAR KIT, NOT per bush. Powerflex usually price their bushes singly, but we have combined the QTY and price to keep it simple for you!