BMW Drive Belts & V-Belts for BMW 1 Series

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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
In Stock
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#:37419776
Part#: 049453LA01-02KT7
Ships on Nov 12, 2026
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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Accessory Belt Tensioner Assembly
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:591622
Part#: 11287563927
In Stock
$ 60.99 USD
Free Shipping on orders $49 and up
This is the main belt tensioner for A/C, Alternator, and power steering.

Crankshaft Pulley With Vibration Damper
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:593668
Part#: 11237564969
Back Ordered
$ 234.99 USD
Free Shipping
$ 234.99 USD
Free Shipping
Every time the cylinders fire, torque is transferred into the crankshaft. The crankshaft deflects under this torque, which sets up vibrations when the torque is released. At certain engine speeds the torque imparted by the cylinders are in synch with the vibrations in the crankshaft, which results in a phenomenon called resonance This resonance causes stress beyond what the crankshaft can withstand, resulting in crankshaft failure. The accessory pulley acts as a balancer and prevents these vibrations from destroying your crankshaft.
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URO Upper Idler Pulley - BMW N54 3.0L
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:591621
Part#: 11287556251
In Stock
$ 28.89 USD
Free Shipping on orders $49 and up
The higher idler pulley
Idler Pulley
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:37892100
Part#: 11287578675
Ships in 1 Business Day
$ 28.54 USD
Free Shipping on orders $49 and up
The idler pulley serves as a guide and support for the serpentine belt, ensuring it runs smoothly over the entire system.

Lower Idler Pulley
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:384427
Part#: 11287557851
Ships in 1 Business Day
$ 23.99 USD
Free Shipping on orders $49 and up
The lowest of the idler pulleys on the accessory drive belt. Featuring NTN/NSK bearing.
Accessory Belt Tensioner Assembly
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:583971
Part#: 11287582946
Ships in 1 Business Day
$ 46.99 USD
Free Shipping on orders $49 and up

URO - Corporate Logo
T#:591618
Part#: 11287530314
Ships in 1 Business Day
$ 48.99 USD
Free Shipping on orders $49 and up
Complete tensioner assembly

URO A/C Idler Pulley - BMW E82/88 E84 E9X N55 3.0L
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:43446142
Part#: 11287578674
Ships in 1 Business Day
$ 25.99 USD
Free Shipping on orders $49 and up
Commonly replaced when servicing belts or the cooling system, or when it begins to make noise.
Deflection Pulley
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:591619
Part#: 11287535860
Ships in 1 Business Day
$ 17.99 USD
Free Shipping on orders $49 and up
Commonly replaced when servicing belts or cooling system, or when it begins to make noise.