BMW Drive Belts & V-Belts

Your BMW's drive belts are wear items, and will degrade and crack over time. Don't wait until you have a belt failure... don't get stranded! Replacing your BMW's belts, such as the alternator belt, power steering belt, air conditioning AC belt, or serpentine belt is a low cost insurance policy to preventing a break down -- or worse, engine damage. We recommend checking your belts every 10,000 miles. If your belts have excessive cracks, dry rot, missing teeth and/or grooves, are cause noise, it's time for new ones.

While also inspecting your serpentine belts, also check for wear or resistance in the pulleys. The tensioner pulley and deflection pulley are the primary sources for belt squealing. The rubber-isolated pulleys can also break apart, leading to total belt failure. We sell the tensioner and deflection pulleys for the M50 engine family used in the E34, E36, E39, E46, X5, Z3, and Z4.

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Bav Auto Ratcheting Serpentine Belt Wrench Kit

T#:580390

Part#: B8800077

In Stock

Sale - Save 10% $ 67.99

This product was last offered at the strikethrough price on
05-03-2026

$ 61.19 USD

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Qty

Sale - Save 10%

$ 67.99

This product was last offered at the strikethrough price on
05-03-2026

$ 61.19 USD

Add to Wish List

Used to retract your serpentine belt tensioner. This kit includes 18mm, 5/8 in, 14mm, 13mm, 12mm, sockets and 3/8 in and 1/4 in drive adapters

Bav Auto Serpentine Belt Tensioner Tool Set

T#:580361

Part#: B8800034

In Stock

Sale - Save 3% $ 30.99

This product was last offered at the strikethrough price on
05-03-2026

$ 30.06 USD

Add to Wish List

Qty

Sale - Save 3%

$ 30.99

This product was last offered at the strikethrough price on
05-03-2026

$ 30.06 USD

Add to Wish List

This specialty wrench is required to retract the serpentine belt tensioner - necessary in order to remove or install your accessory drive belt. Includes tensioner locking-pin which conveniently holds your tensioner in place while changing belt.

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