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BMW Drive Belts & V-Belts for BMW E60 M5 S85 5.0L

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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OEM INA Idler Pulley - Multiple BMWs

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T#:1626

Part#: 11287841228

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$ 18.99 USD

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$ 18.99 USD

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This is an OEM INA Upper Idler Pulley, also known as the roller pulley or deflection pulley. The upper and lower idler pulleys are known to be the primary sources for 'belt squealing'. The pulley is also encased in rubber which will crack over time. If left without service the rubber could fail completely, chucking the belt and leaving you stranded. Replacement is a very simple procedure and can be done anytime the fan is off the engine (belt replacement, water pump service, alternator replacement, etc).

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Idler Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:30629656

Part#: 11287841228

In Stock

Sale - Save 22% $ 19.99

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

$ 15.50 USD

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Sale - Save 22%

$ 19.99

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

$ 15.50 USD

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Bremmen Water Pump/Alternator Drive Belt - BMW S85

10X Entries Into Our F80 M3 Sweepstakes

T#:21078401

Part#: S6PK1425

In Stock

Sale - Save 71% $ 16.99

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

$ 5.00 USD

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Qty

Sale - Save 71%

$ 16.99

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

$ 5.00 USD

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Accessory drive belts keep everything turning off of the crank pulley. Generators and water pumps both rely on this belt to keep everything working properly. If your drive belt is getting old, cracking, glazing, or squeaking, replace it.

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BMW Drive Belts & V-Belts for BMW E60 M5 S85 5.0L

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OEM INA Idler Pulley - Multiple BMWs

Idler Pulley

Bremmen Water Pump/Alternator Drive Belt - BMW S85

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