BMW BELT TENSIONER V-RIBBED BELT
BMW Part Number: 11287512758
FEBI BILSTEIN Part Number: 23650
How do I know if this part needs replacing
Keeping all of your belts tight is imperative to making everything in your vehicle functioning. If your A/C belt tensioner pulley is not keeping enough tension on your belt, your entire A/C system won't work as effectively. A usual sign that your tensioner needs replacing is if your belt keeps slipping causing the system to "squeal".