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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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Enthusiast Bundles - Corporate Logo
T#:37419777
Part#: 049453LA01-02KT8
Ships on Sep 10, 2026
Sale - Save 47% $ 170.99

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

$ 91.08 USD
Free Shipping on orders $49 and up
Sale - Save 47%
$ 170.99

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

$ 91.08 USD
Free Shipping on orders $49 and up

Enthusiast Bundle: Turner Motorsport Crank Seal Guard with ECS Kevlar-Reinforced Belt

Protect your N5X/S55 from catastrophic failure with this must-have upgrade!

The Turner Motorsport Crank Seal Guard is meticulously designed to safeguard your engine’s crank seal from potential damage caused by a shredded serpentine belt. Oil or coolant leaks can lead to accessory belt slippage, fraying, and tearing, which can send belt debris behind the harmonic balancer and into the crank seal, risking serious engine damage.

Key Benefits:

Shields crank seal from accessory belt debris, preventing engine failure Custom-fit for N54/N55/S55 engines Zinc-coated fasteners for superior corrosion resistance Durable 6061 billet aluminum construction, with Turner blue anodized finish for added strength and style Cutting-Edge Design:

Designed using FARO laser scanning and Solidworks CAD for precision fitment Rigorous testing ensures reliable protection in all conditions Easily installs with 2 securing bolts torqued to 20Nm ECS Performance Kevlar-Reinforced Accessory Belt:

Reduced elongation for consistent performance over time Enhanced shock and impact resistance Superior oil and temperature resistance tested to JASO E 109-94 and SAE J2432 standards Ensure long-term engine health and peace of mind with the Turner Motorsport Crank Seal Guard and ECS Kevlar-Reinforced Accessory Belt combo. Prevent the "when, not if" risk of belt-related engine failure today!

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Enthusiast Bundles - Corporate Logo
T#:37419774
Part#: 049453LA01-02KT6
In Stock
Sale - Save 46% $ 180.99

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

$ 97.62 USD
Free Shipping on orders $49 and up
Sale - Save 46%
$ 180.99

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

$ 97.62 USD
Free Shipping on orders $49 and up

Enthusiast Bundle: Turner Motorsport Crank Seal Guard with ECS Kevlar-Reinforced Belt

Protect your N5X/S55 from catastrophic failure with this must-have upgrade!

The Turner Motorsport Crank Seal Guard is meticulously designed to safeguard your engine’s crank seal from potential damage caused by a shredded serpentine belt. Oil or coolant leaks can lead to accessory belt slippage, fraying, and tearing, which can send belt debris behind the harmonic balancer and into the crank seal, risking serious engine damage.

Key Benefits:

Shields crank seal from accessory belt debris, preventing engine failure Custom-fit for N54/N55/S55 engines Zinc-coated fasteners for superior corrosion resistance Durable 6061 billet aluminum construction, with Turner blue anodized finish for added strength and style Cutting-Edge Design:

Designed using FARO laser scanning and Solidworks CAD for precision fitment Rigorous testing ensures reliable protection in all conditions Easily installs with 2 securing bolts torqued to 20Nm ECS Performance Kevlar-Reinforced Accessory Belt:

Reduced elongation for consistent performance over time Enhanced shock and impact resistance Superior oil and temperature resistance tested to JASO E 109-94 and SAE J2432 standards Ensure long-term engine health and peace of mind with the Turner Motorsport Crank Seal Guard and ECS Kevlar-Reinforced Accessory Belt combo. Prevent the "when, not if" risk of belt-related engine failure today!

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Enthusiast Bundles - Corporate Logo
T#:37419776
Part#: 049453LA01-02KT7
In Stock
Sale - Save 43% $ 178.98

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

$ 101.21 USD
Free Shipping on orders $49 and up
Sale - Save 43%
$ 178.98

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

$ 101.21 USD
Free Shipping on orders $49 and up

Enthusiast Bundle: Turner Motorsport Crank Seal Guard with ECS Kevlar-Reinforced Belt

Protect your N5X/S55 from catastrophic failure with this must-have upgrade!

The Turner Motorsport Crank Seal Guard is meticulously designed to safeguard your engine’s crank seal from potential damage caused by a shredded serpentine belt. Oil or coolant leaks can lead to accessory belt slippage, fraying, and tearing, which can send belt debris behind the harmonic balancer and into the crank seal, risking serious engine damage.

Key Benefits:

Shields crank seal from accessory belt debris, preventing engine failure Custom-fit for N54/N55/S55 engines Zinc-coated fasteners for superior corrosion resistance Durable 6061 billet aluminum construction, with Turner blue anodized finish for added strength and style Cutting-Edge Design:

Designed using FARO laser scanning and Solidworks CAD for precision fitment Rigorous testing ensures reliable protection in all conditions Easily installs with 2 securing bolts torqued to 20Nm ECS Performance Kevlar-Reinforced Accessory Belt:

Reduced elongation for consistent performance over time Enhanced shock and impact resistance Superior oil and temperature resistance tested to JASO E 109-94 and SAE J2432 standards Ensure long-term engine health and peace of mind with the Turner Motorsport Crank Seal Guard and ECS Kevlar-Reinforced Accessory Belt combo. Prevent the "when, not if" risk of belt-related engine failure today!

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Enthusiast Bundles - Corporate Logo
T#:37419773
Part#: 049453LA01-02KT5
In Stock
Sale - Save 41% $ 170.99

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

$ 101.31 USD
Free Shipping on orders $49 and up
Sale - Save 41%
$ 170.99

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

$ 101.31 USD
Free Shipping on orders $49 and up

Enthusiast Bundle: Turner Motorsport Crank Seal Guard with ECS Kevlar-Reinforced Belt

Protect your N5X/S55 from catastrophic failure with this must-have upgrade!

The Turner Motorsport Crank Seal Guard is meticulously designed to safeguard your engine’s crank seal from potential damage caused by a shredded serpentine belt. Oil or coolant leaks can lead to accessory belt slippage, fraying, and tearing, which can send belt debris behind the harmonic balancer and into the crank seal, risking serious engine damage.

Key Benefits:

Shields crank seal from accessory belt debris, preventing engine failure Custom-fit for N54/N55/S55 engines Zinc-coated fasteners for superior corrosion resistance Durable 6061 billet aluminum construction, with Turner blue anodized finish for added strength and style Cutting-Edge Design:

Designed using FARO laser scanning and Solidworks CAD for precision fitment Rigorous testing ensures reliable protection in all conditions Easily installs with 2 securing bolts torqued to 20Nm ECS Performance Kevlar-Reinforced Accessory Belt:

Reduced elongation for consistent performance over time Enhanced shock and impact resistance Superior oil and temperature resistance tested to JASO E 109-94 and SAE J2432 standards Ensure long-term engine health and peace of mind with the Turner Motorsport Crank Seal Guard and ECS Kevlar-Reinforced Accessory Belt combo. Prevent the "when, not if" risk of belt-related engine failure today!

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Dinan - Corporate Logo
T#:21078436
Part#: D560-0001
Ships in 5 Business Days
Sale - Save 10% $ 449.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 404.96 USD
Free Shipping on orders $49 and up
Sale - Save 10%
$ 449.99

This product was last offered at the strikethrough price on
07-31-2026

$ 404.96 USD
Free Shipping on orders $49 and up
Dinan's lightweight billet aluminum crankshaft pulley underdrives each of the accessories by 13 percent, reducing parasitic drag on the engine for a 6 HP @ 8000 RPM and 4 lb-ft torque @ 8000 RPM gain on a stock vehicle. The Dinan underdrive pulley retains the factory harmonic crankshaft damper, eliminating vibration that might otherwise damage the crankshaft. The kit includes all of the necessary mounting hardware, a lightweight pulley, and shorter belts. This product is backed by our industry-leading 4 year/50,000 mile warranty so you can rest assured that you are purchasing the best quality product for your BMW. Features: All accessories are underdriven by 13% to decrease drag on the engine. Lightweight billet aluminum crankshaft pulley, black anodized and engraved. Includes mounting hardware and shorter belts.
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