Crank Pulley Diesel (Topran) (N57 N57S) (BMW 5 Series F10 / 7 Series F01 / X5 E70 / X6 E71) is a vital engine component designed to drive auxiliary belts that power essential systems such as the alternator, power steering pump, and air conditioning compressor. This crank pulley is specified for diesel variants with the N57 and N57S engine codes found in BMW 5 Series F10, 7 Series F01, X5 E70, and X6 E71 models.
The crank pulley serves as the connection point for the crankshaft to transfer rotational force to belt-driven accessories. Comparing your current unit with this pulley, check the dimensions, bolt pattern, and belt groove compatibility to ensure matching fitment. This part’s design and application are specific to the listed BMW diesel models, so verifying engine code and vehicle series is key when selecting a replacement.
When sourcing this part, it is important to match the crank pulley exactly to maintain engine accessory function and belt alignment. If uncertain, consulting with a specialist or submitting a request for part advice can help confirm compatibility based on your vehicle’s details.
- Fits BMW diesel engines N57 and N57S
- Suitable for 5 Series F10, 7 Series F01, X5 E70, X6 E71
- Drives multiple accessory belts from the crankshaft
Need help matching this item to your vehicle? Use more Crank Pulley, Vehicle Parts Finder or Request a Part with your VIN, engine number, part number or clear photos.





