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BMW Drive Belts & V-Belts for BMW E90 M3 S65 4.0L

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 Accessory Belt Tensioner Pulley - Water Pump/Alternator - BMW...

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T#:31059479

Part#: 11287838194KT

In Stock

$ 30.99 USD

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$ 30.99 USD

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If your water pump or alternator belt tensioner has failed because of the pulley or bearing, this replacement pulley is all you need to get your BMW back on the road! BMW and other brands usually sell the tensioner with the metal arm included, which increases the cost, even though the arm often doesn't need replacement. This OEM replacement is a much more affordable option, saving you $150 or more compared to the Genuine BMW tensioner.

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URO Hydraulic Belt Tensioner - BMW E9X M3, E60 M5, E63 M6

2X Entries Into Our F80 M3 Sweepstakes

T#:48573724

Part#: 11287835417

Ships in 1 Business Day

$ 120.11 USD

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$ 120.11 USD

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Hydraulic Belt Tensioner for E9x M3 with S65 engine and E60 M5, E63 M6 with S85 engine. This oil-filled tensioner keeps the main drive belt in the proper tension. Over time, the seals wear, allowing fluid to leak out and the tensioner then becomes frozen or inoperable. Replacement is the best corrective action to take. This can be done during any belt or pulley service or anytime the fan is off the engine.

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OEM INA Accesory Belt Tensioner Pulley - Air Conditioner - BMW E9X M3...

For clockwise power steering pump

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T#:31092500

Part#: 11287838196KT

Ships in 1-2 days

$ 25.99 USD

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$ 25.99 USD

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If your air conditioning belt tensioner has failed because of the pulley or bearing, this replacement pulley is all you need to get your BMW back on the road! BMW and other brands usually sell the tensioner with the metal arm included, which increases the cost, even though the arm often doesn't need replacement. This OEM replacement is a much more affordable option, saving you $180 or more compared to the Genuine BMW tensioner.

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Rogue Engineering Power Pulley Set - E9X M3 (05/2008+)

T#:553839

Part#: PP.S65.V8.B

Ships in 6 Business Days

$ 295.00 USD

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$ 295.00 USD

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Rogue Engineering has developed a power pulley kit that reduces the drag on specific pulleys while allowing others to remain at their same efficiency. This allows for perfect operation in daily driven vehicles without a hiccup or stutter. However, when the demand for power is requested, the power pulley kit allows for the freed power to become apparent. The term "power" pulley is a bit of a misnomer. Underdrive pulleys actually free up power by reducing the drag caused by the accessories. These pulleys are based off a calculated percentage from factory dimensions, so that particular component speeds are safely reduced without affecting their true purpose.

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Bav Auto Ratcheting Serpentine Belt Wrench Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:580390

Part#: B8800077

In Stock

Sale - Save 7% $ 67.99

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

$ 62.99 USD

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Qty

Sale - Save 7%

$ 67.99

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

$ 62.99 USD

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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

Rogue Engineering Power Pulley Set - E9X M3 (up to 05/2008)

For vehicles with a production date up to 05/2008 with single drive belt.

T#:553840

Part#: PP.S65.V8.A

Ships in 8 Business Days

$ 295.00 USD

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$ 295.00 USD

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OEM INA Idler Pulley - Multiple BMWs

For vehicles with a production date up to 04/2008

We Price Match - Give Us A Call or Chat!

T#:1626

Part#: 11287841228

In Stock

$ 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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BMW Drive Belts & V-Belts for BMW E90 M3 S65 4.0L

Sub-Categories

OEM INA Accessory Belt Tensioner Pulley - Water Pump/Alternator - BMW...

URO Hydraulic Belt Tensioner - BMW E9X M3, E60 M5, E63 M6

OEM INA Accesory Belt Tensioner Pulley - Air Conditioner - BMW E9X M3...

Rogue Engineering Power Pulley Set - E9X M3 (05/2008+)

Bav Auto Ratcheting Serpentine Belt Wrench Kit

Rogue Engineering Power Pulley Set - E9X M3 (up to 05/2008)

OEM INA Idler Pulley - Multiple BMWs

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