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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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OEM Accessory Belt Service Kit - F3X F22/23 N55 3.0L
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:587391
Part#: 11287628661ABKT
In Stock
$ 171.99

This product was last offered at the strikethrough price on
06-09-2026

$ 153.99 USD
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$ 153.99 USD
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This kit includes the basic components recommended to replace when it comes time to swap out your accessory belt.
Packaged by Turner - Corporate Logo
T#:22097553
Part#: 11287628661TKT
Ships on Feb 23, 2027
Sale - Save 23% $ 131.99

This product was last offered at the strikethrough price on
06-16-2026

$ 101.98 USD
Free Shipping on orders $49 and up
Sale - Save 23%
$ 131.99

This product was last offered at the strikethrough price on
06-16-2026

$ 101.98 USD
Free Shipping on orders $49 and up
Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belt, tensioner assembly, and idler pulley. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!
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Enthusiast Bundles - Corporate Logo
T#:37419777
Part#: 049453LA01-02KT8
Ships on Dec 8, 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
Ships on Feb 23, 2027
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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OEM Accessory Belt Service Kit - N54 3.0L
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:554448
Part#: N54ACCKT
Ships in 3 Business Days
Sale - Save 16% $ 187.99

This product was last offered at the strikethrough price on
10-19-2026

$ 158.57 USD
Free Shipping
Sale - Save 16%
$ 187.99

This product was last offered at the strikethrough price on
10-19-2026

$ 158.57 USD
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Over time, accessory belts begin to wear out and crack. This can lead to the belt slipping, squeaking, or even snapping. Replace your belts and tensioners on a regular basis to ensure you don't end up stranded on the side of the road with a dead battery or overheated engine due to a bit of simple overlooked maintenance. This kit includes all of the items that will need replaced such as the belts, tensioners, and hardware.
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OEM Accessory Belt Service Kit - E82/88 E9X N55
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:567679
Part#: 11287582946KT4
In Stock
Sale - Save 13% $ 213.99

This product was last offered at the strikethrough price on
10-15-2026

$ 187.17 USD
Free Shipping
Sale - Save 13%
$ 213.99

This product was last offered at the strikethrough price on
10-15-2026

$ 187.17 USD
Free Shipping
Over time, accessory belts begin to wear out and crack. This can lead to the belt slipping, squeaking, or even snapping. Replace your belts and tensioners on a regular basis to ensure you don't end up stranded on the side of the road with a dead battery or overheated engine due to a bit of simple overlooked maintenance. This kit includes all of the items that will need to be replaced such as the belts, tensioners, and hardware.
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OEM Accessory Belt Service Kit - N52 3.0L
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:593693
Part#: N52ABKT
In Stock
Sale - Save 22% $ 135.99

This product was last offered at the strikethrough price on
07-08-2026

$ 105.43 USD
Free Shipping
Sale - Save 22%
$ 135.99

This product was last offered at the strikethrough price on
07-08-2026

$ 105.43 USD
Free Shipping
Over time, accessory belts begin to wear out and crack. This can lead to the belt slipping, squeaking, or even snapping. Replace your belts and tensioners on a regular basis to ensure you don't end up stranded on the side of the road with a dead battery or overheated engine due to a bit of simple overlooked maintenance. This kit includes all of the items that will need replaced such as the belts, tensioners, and hardware.
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Packaged by Turner - Corporate Logo
T#:22163422
Part#: 11287568247TKT
Ships on Dec 8, 2026
Sale - Save 7% $ 179.99

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

$ 168.27 USD
Free Shipping on orders $49 and up
Sale - Save 7%
$ 179.99

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

$ 168.27 USD
Free Shipping on orders $49 and up
Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belt, tensioner assembly, and idler pulleys. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!
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Enthusiast Bundles - Corporate Logo
T#:37419776
Part#: 049453LA01-02KT7
Ships on Dec 8, 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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OEM Accessory Belt Service Kit - F3X F10 N20 2.0L
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:587390
Part#: 11287594969ABKT
In Stock
Sale - Save 29% $ 89.15

This product was last offered at the strikethrough price on
06-29-2026

$ 62.94 USD
Free Shipping
Sale - Save 29%
$ 89.15

This product was last offered at the strikethrough price on
06-29-2026

$ 62.94 USD
Free Shipping
This kit includes the basic components recommended to replace when it comes time to swap out your accessory belt.
Packaged by Turner - Corporate Logo
T#:22130432
Part#: 11287530314TKT
In Stock
Sale - Save 18% $ 127.99

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

$ 104.71 USD
Free Shipping on orders $49 and up
Sale - Save 18%
$ 127.99

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

$ 104.71 USD
Free Shipping on orders $49 and up
Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belt, tensioner assembly, and idler pulley. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!
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Friction Wheel N12 N14 N16 N18 1.6L Engine
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:591689
Part#: 11287598833
In Stock
$ 84.99 USD
Free Shipping
$ 84.99 USD
Free Shipping

Friction Wheel for MINI N12 N14 N16 N18 1.6L Engine - URO

Upgrade your MINI's engine with the Friction Wheel for N12 N14 N16 N18 1.6L engine from URO. This friction wheel serves as a vital link between two pulleys, driving the water pump for optimal engine performance. Over time, the bearings in this unit may begin to squeak and fail, making it essential to replace when changing the serpentine belt.

Benefits:

  • Ensures smooth operation of the water pump
  • Prevents squeaking bearings for quieter engine performance
  • Designed for compatibility with N12 N14 N16 N18 1.6L engines
  • Easy replacement during serpentine belt changes
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Hydraulic Alternator Belt Tensioner Assembly
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:396757
Part#: 11287838797
In Stock
$ 53.99 USD
Free Shipping on orders $49 and up
URO Drive Belt Tensioner W/ Pulley - BMW F8X M2 M3 M4
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:50066851
Part#: 11288088632
In Stock
$ 60.99 USD
Free Shipping on orders $49 and up
Replaces broken or damaged drive belt tensioner.
URO - Corporate Logo
T#:340641
Part#: 11511436590
In Stock
$ 45.99 USD
Free Shipping on orders $49 and up
$ 45.99 USD
Free Shipping on orders $49 and up
An upgrade over commonly failing plastic pulley

Enthusiast Bundles - Corporate Logo
T#:37419773
Part#: 049453LA01-02KT5
Ships on Nov 12, 2026
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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URO Crankshaft Vibration Damper - 11237573655
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:28171559
Part#: 11237573655
In Stock
$ 341.99 USD
Free Shipping on orders $49 and up
A vibration damper is crucial for preventing shock load factors that could damage the crankshaft. If your damper is faulty, opt for this quality replacement from URO Parts for a lasting and comprehensive fix.
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Atlantic Automotive Engineering - Corporate Logo
T#:45757458
Part#: 32427830838
In Stock
$ 50.99

This product was last offered at the strikethrough price on
10-14-2026

$ 44.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 50.99

This product was last offered at the strikethrough price on
10-14-2026

$ 44.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
A new power steering pulley is key to keeping your steering system smooth and reliable. Over time, pulleys can warp, crack, or wear, causing belt slippage, whining noises, or even pump failure. Installing a fresh pulley restores correct belt alignment, eliminates noise, and maintains consistent hydraulic pressure for precise, effortless steering. Why choose a new pulley? Smooth operation – Ensures proper belt tension for dependable pump performance. Noise reduction – Eliminates squealing, whining, or vibration from worn pulleys. System protection – Protects the pump and steering components from damage. Install a new pulley and keep your steering system running quietly, efficiently, and confidently.
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Packaged by Turner - Corporate Logo
T#:22097555
Part#: 11287618848TKT
Ships on Dec 8, 2026
Sale - Save 34% $ 106.99

This product was last offered at the strikethrough price on
06-01-2026

$ 70.48 USD
Free Shipping on orders $49 and up
Sale - Save 34%
$ 106.99

This product was last offered at the strikethrough price on
06-01-2026

$ 70.48 USD
Free Shipping on orders $49 and up
Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belt and an OEM tensioner assembly. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the tensioner and upgrading your accessory belt is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!
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URO - Corporate Logo
T#:48573724
Part#: 11287835417
In Stock
$ 120.11 USD
Free Shipping on orders $49 and up
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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N54 AC Delete Accessory Belt Kit - BMW N54 3.0L
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:26771665
Part#: 7PK1660KT
Ships on Feb 23, 2027
Sale - Save 13% $ 75.99

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

$ 66.28 USD
Free Shipping on orders $49 and up
Sale - Save 13%
$ 75.99

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

$ 66.28 USD
Free Shipping on orders $49 and up
This AC Delete Accessory Belt Kit includes a new idler pulley and a shorter ECS Kevlar belt for deleting your AC compressor. ECS Tuning Performance Kevlar reinforced belts give you that extra piece of mind! Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Tensile strength Elongation Hardness Temperature and oil resistance per standard JASO E 109-94 Flex testing per SAE J2432
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Crankshaft Pulley
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:591616
Part#: 11281735358
Ships in 1 Business Day
$ 98.99 USD
Free Shipping
$ 98.99 USD
Free Shipping
Reduces vibrations and connects accessories
Accessory Belt Service Kit - E39 E46 M54 (2002+)
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:401685
Part#: 11287512762KT3
Ships in 1 Business Day
Sale - Save 22% $ 228.99

This product was last offered at the strikethrough price on
06-23-2026

$ 179.56 USD
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Sale - Save 22%
$ 228.99

This product was last offered at the strikethrough price on
06-23-2026

$ 179.56 USD
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This kit covers many of the common wear items that should be changed any time the serpentine belt is being replaced. As these cars gain years and mileage the belt tensioners will also need to be replaced along with the actual belts. It won't do any good to replace the belt if the tensioners are worn. This kit will save you time and money over buying these pieces individually. This kit includes an updated hydraulic alternator tensioner for added reliability and longevity.
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Gates - Corporate Logo
T#:27171927
Part#: 11288613707
In Stock
$ 39.99 USD
Free Shipping on orders $49 and up

The accessory drive belts are essential for keeping various components running smoothly off the crank pulley. These belts power critical systems like the generator, fans, water pumps, and AC compressors, ensuring optimal functionality. When your drive belt shows signs of aging such as cracking, glazing, or squeaking, it's time for a replacement.

You can easily spot wear and tear on the belts. Look for glazing on the underside, which indicates reduced effectiveness. Cracks on the back of the belt can result from "dry rot" caused by engine heat or age. Squealing noises are also common with worn belts, indicating slippage on pulleys. In either case, it's crucial to install a new belt for your vehicle's optimal performance.

Gates FleetRunner Micro-V Belts are a top choice, featuring patented EPDM construction with a distinctive green overcord. Designed for heavy-duty drives, these belts offer superior flexibility, stability, and extended lifespan. While originally intended for the heavy-duty diesel market, enthusiasts worldwide rely on Gates FleetRunner belts for their unmatched durability and performance.

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Power Steering Pump Pulley
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:592383
Part#: 32421722555
In Stock
$ 90.99 USD
Free Shipping
$ 90.99 USD
Free Shipping
Driven by serpentine accessory belt
Water Pump Pulley
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:638798
Part#: 11517840403
Ships in 1 Business Day
$ 57.99 USD
Free Shipping on orders $49 and up
Packaged by Turner - Corporate Logo
T#:23482929
Part#: 8PK1478TKT
Ships on Nov 12, 2026
Sale - Save 23% $ 167.99

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

$ 129.72 USD
Free Shipping on orders $49 and up
Sale - Save 23%
$ 167.99

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

$ 129.72 USD
Free Shipping on orders $49 and up
Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belt, tensioner assembly, and new pulleys. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!
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Packaged by Turner - Corporate Logo
T#:22163426
Part#: 11287848605TKT
Ships on Nov 12, 2026
$ 414.99

This product was last offered at the strikethrough price on
08-07-2026

$ 385.99 USD
Free Shipping on orders $49 and up
$ 385.99 USD
Free Shipping on orders $49 and up
Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes ECS Kevlar Reinforced Drive Belts, tensioner assembly, and idler pulleys. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!
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Packaged by Turner - Corporate Logo
T#:15710772
Part#: 11281730349-KT
Ships in 1 Business Day
Sale - Save 1% $ 499.99

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

$ 494.69 USD
Free Shipping on orders $49 and up
Sale - Save 1%
$ 499.99

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

$ 494.69 USD
Free Shipping on orders $49 and up
The idea of power pulleys is simple. The less effort the engine puts into running accessories such as the water pump, power steering, pump alternator etc., the more of that power can be used elsewhere - your wheels! The way this is done by reducing the rotation of the pulleys by as much as 10-20%! The end result is more horsepower at your disposal. Turner has done extensive testing (on and off the track), to ensure that the accessory systems still function as intended and without failure. These pulleys offer an excellent compromise of power gains, reliability and performance. All Turner pulleys are constructed of high quality T-6061 aluminum for durability and longevity. They are also finished in a black hard anodizing, which is highly resistant to wear including chemical and heat exposure. They have been designed to carry stock-like aesthetics, but with increased strength properties and lighter weight. Because of the durable aluminum construction, you can also put the worries of a serious plastic failure to rest. These pulleys will last, all the while increasing horsepower too! While you're installing your Power Pulley Kit, it makes sense to overhaul your Accessory Belt System as well, so this kit includes our Accessory Belt Kit as well.
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Packaged by Turner - Corporate Logo
T#:22097533
Part#: 11288613707TKT
Ships on Nov 16, 2026
Sale - Save 24% $ 137.99

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

$ 105.35 USD
Free Shipping on orders $49 and up
Sale - Save 24%
$ 137.99

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

$ 105.35 USD
Free Shipping on orders $49 and up
Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belt, tensioner assembly, and the hardware required to install the new tensioner. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!
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Mechanical Belt Tensioner - NTN/NSK Bearings
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:591687
Part#: 11287571015
In Stock
$ 53.99 USD
Free Shipping on orders $49 and up
Packaged by Turner - Corporate Logo
T#:29798952
Part#: 11288650740T1KT
Ships on Nov 16, 2026
Sale - Save 24% $ 137.99

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

$ 105.35 USD
Free Shipping on orders $49 and up
Sale - Save 24%
$ 137.99

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

$ 105.35 USD
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Having your accessory belt fail is a major inconvenience and can leave you on the side of the road if the alternator isn't charging and the mechanical water pump isn't turning. Over time the tensioner and the belt itself wears out and will eventually fail. This kit includes everything you need to service the belt drive system and keep everything in check. Included: ECS Tuning Kevlar Reinforced Performance Accessory Belt - Designed to resist OEM Febi Belt Tensioner Genuine BMW Tensioner Hardware
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Drive Wheel For Water Pump
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:5760271
Part#: 11517619020
In Stock
$ 42.01

This product was last offered at the strikethrough price on
09-08-2026

$ 41.99 USD
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$ 41.99 USD
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Mubea - Corporate Logo
T#:594655
Part#: 11287810807
Ships in 1 Business Day
$ 148.53

This product was last offered at the strikethrough price on
07-15-2026

$ 138.73 USD
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$ 138.73 USD
Free Shipping on orders $49 and up
If the accessory belt is sloppy and loose in your vehicle, your generator, and AC might not work properly. Alternatively, if your belt snaps constantly, the tensioner is too tight.
Adjustment Pulley - Newer Version
We Price Match - Give Us A Call or Chat!
LUK - Corporate Logo
T#:591704
Part#: 11288625983
In Stock
$ 41.99

This product was last offered at the strikethrough price on
08-12-2026

$ 34.99 USD
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$ 34.99 USD
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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
Ships in 1 Business Day
$ 234.99 USD
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$ 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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Mechanical Alternator Belt Tensioner Assembly
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:371980
Part#: 11281427252
Ships in 1 Business Day
$ 50.99 USD
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$ 50.99 USD
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Tensions the belt connecting the water pump, alternator, and power steering pump. Includes roller.

ARP - Corporate Logo
T#:49092362
Part#: ARP-CBS-S58
Ships in 3 Business Days
$ 134.99 USD
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The OE crank bolts are grade 10 torque-to-yield bolts, designed for only a single use. For vehicles making stock power, the stock bolts are more than enough. Unfortunately, vehicles making more power than stock have experienced issues with the stock damper bolts coming loose and breaking, leading to engine and crank damage. 5150 AutoSport worked with ARP to create this ARP Harmonic Damper Bolt Set to address this issue. These upgraded bolts are stronger than the factory bolts and are designed to provide even repeatable torque load, preventing them from breaking and allowing them to be re-torqued as needed.
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OEM Accessory Belt Service Kit - BMW F8X S55
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:589853
Part#: PBTABF8XS55KT
In Stock
$ 433.99

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

$ 412.99 USD
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$ 412.99 USD
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Over time, accessory belts begin to wear out and crack. This can lead to the belt slipping, squeaking, or even snapping. Replace your belts and tensioners on a regular basis to ensure you don't end up stranded on the side of the road with a dead battery or overheated engine due to a bit of simple overlooked maintenance. This kit includes all of the items that will need replaced such as the belts, tensioners, and hardware.
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OEM Accessory Belt Service Kit - B46/48 B58
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:587399
Part#: 112886137071ABKT
In Stock
Sale - Save 19% $ 121.99

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

$ 98.77 USD
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Sale - Save 19%
$ 121.99

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

$ 98.77 USD
Free Shipping
Over time, accessory belts begin to wear out and crack. This can lead to the belt slipping, squeaking, or even snapping. Replace your belts and tensioners on a regular basis to ensure you don't end up stranded on the side of the road with a dead battery or overheated engine due to a bit of simple overlooked maintenance. This kit includes all of the items that will need to be replaced such as the belts, tensioners, and hardware.
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OEM Accessory Belt Service Kit - E30 M20
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:554430
Part#: 64521706826KT1
Ships on Nov 11, 2026
$ 204.09

This product was last offered at the strikethrough price on
10-23-2026

$ 204.06 USD
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$ 204.06 USD
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Over time, accessory belts begin to wear out and crack. This can lead to the belt slipping, squeaking, or even snapping. Replace your belts and tensioners on a regular basis to ensure you don't end up stranded on the side of the road with a dead battery or over heated engine due to a bit of simple overlooked maintenance. This kit includes all of the items that will need replaced such as the belts, tensioners, and hardware.

Fits the following BMWs:
1984-1991 E30 BWM 325, 325i/is/ix, 325e/es

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Packaged by Turner - Corporate Logo
T#:1241396
Part#: TMSN54BPKT
In Stock
$ 569.99

This product was last offered at the strikethrough price on
10-13-2026

$ 564.99 USD
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$ 564.99 USD
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BMW has a seemingly endless number of fans of the N54/N55/S55 engines, three straight-six turbo engines that are each capable of 750+ horsepower, but that doesn't mean they were without their faults! BMW's N54 had a notoriously rocky start with reliability due to multiple issues such as fuel injectors failing, turbos failing, serpentine belt failure, crank hubs coming loose, and more... BMW made multiple attempts to fix the issues plaguing the N54, but they could only do so much and the fixes rolled out seemed temporary at best. Following the N54, BMW released their updated N55 and S55 engines, giving many people hope that these engines would address the previous issues. Unfortunately, this was only some-what the case. Crank hubs and crank bolts continued to loosen over time and serpentine belts continued to shred themselves and get pulled into the oil pan through the front main seal. For all three engines, this meant a single failure could effectively turn your engine into an oversized paperweight. Luckily for us, the BMW community is full of skilled enthusiasts who have gladly taken up the task to offer solutions! The first headache to be addressed was the Crank Hub and Bolt. Using a simple plate that fits perfectly over your crank hub's hex-head bolt and mounts up against the damper, the crank bolt is effectively locked in place, preventing it from being able to back out until the plate is fully removed. Next up was the serpentine belt failures. It's not known what exactly causes the serpentine belt to split, but once it does, the pieces hanging off of the belt wrap around and behind the damper. This leads to the belt breaking up into smaller pieces and eventually getting pushed between the crank hub and rear main seal into the oil pan. These small pieces of debris get caught in and block the oil pickup, preventing oil flow and leading to engine failure. To prevent this, multiple aftermarket companies came up with their own versions of Crank Seal Plates. This plate is installed behind the front damper, blocking the opening that allows the serpentine belt to pass between the crank hub and seal, keeping debris out of your oil pan! Also included in this kit are the components to service your front Oil Cooler/Filter Housing gaskets, refresh your drive belt system, and install the aftermarket upgrades. Kit Features and Contents: Vargas Turbo Crank Bolt Capture Vargas Turbo Crank Seal Plate OEM Accessory Belt OEM Belt Tensioner & Idler Pullies Liqui-Moly Longtime High Tech Engine Oil (5w-30) - 7 Liters OEM Hengst Oil Filter OEM Oil Filter/Cooler Housing Gaskets TMS Oil Change Sticker Genuine BMW Full-Strength Coolant - 1 Liter Looking to go even further and upgrade your Crank Hub as well? Check out T#558924
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Belt Tensioner Conversion Kit
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:600039
Part#: 11287838797K
Back Ordered
$ 82.99 USD
Free Shipping on orders $49 and up
Update from a mechanical tensioner to a hydraulic style tensioner

Idler Pulley
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:26271781
Part#: 11288673720
In Stock
$ 29.99 USD
Free Shipping on orders $49 and up
Packaged by Turner - Corporate Logo
T#:22163417
Part#: 11287582946TKT
Ships on Dec 8, 2026
Sale - Save 9% $ 223.99

This product was last offered at the strikethrough price on
09-16-2026

$ 204.63 USD
Free Shipping on orders $49 and up
Sale - Save 9%
$ 223.99

This product was last offered at the strikethrough price on
09-16-2026

$ 204.63 USD
Free Shipping on orders $49 and up
Eliminate your squeaking accessory belt pulley and cracked drive belt with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belt, belt tensioner, and idler pullies. ECS Tuning's Red Kevlar Accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. Kevlar-reinforced belts experience less elongation over time minimizing the amount of belt adjustment needed as well as offering a higher shock and impact resistance compared to OEM-style belts. Refreshing the rollers and/or tensioners simultaneously is a great way to ensure all vital components of your drive belt system are functioning optimally for years to come!
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Packaged by Turner - Corporate Logo
T#:554446
Part#: M54ACCKT2
Ships in 1 Business Day
Sale - Save 20% $ 256.99

This product was last offered at the strikethrough price on
06-23-2026

$ 206.83 USD
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Sale - Save 20%
$ 256.99

This product was last offered at the strikethrough price on
06-23-2026

$ 206.83 USD
Free Shipping

Over time, accessory belts begin to wear out and crack. This can lead to the belt slipping, squeaking, or even snapping. Replace your belts and tensioners on a regular basis to ensure you don't end up stranded on the side of the road with a dead battery or over heated engine due to a bit of simple overlooked maintenance. This kit includes all of the items that will need replaced such as the belts, tensioners, and hardware.

Fits the following BMWs:
2000-09/2002 E53 BMW X5 M54
2000-09/2002 E39 BMW M54
1999-09/2002 E46 BMW M54

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Hydraulic Alternator Belt Tensioner Conversion Kit
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:15710833
Part#: 11287838797-KT
In Stock
Sale - Save 27% $ 165.99

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

$ 120.96 USD
Free Shipping on orders $49 and up
Sale - Save 27%
$ 165.99

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

$ 120.96 USD
Free Shipping on orders $49 and up
The original mechanical design is has been discontinued by BMW. So now Turner offers this complete hydraulic tensioner conversion kit for your BMW alternator/water pump/power steering belt. Changes the old style mechanical design to the updated hydraulic design recommended by BMW. Includes the following parts Hydraulic Tensioner Adjusting Pulley Caps & Dust Guards Securing Hardware
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OEM Accessory Belt Service Kit - E39, E46 M54 (up to 2002)
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:401686
Part#: 11281748131KT2
Ships in 1 Business Day
Sale - Save 18% $ 272.99

This product was last offered at the strikethrough price on
06-23-2026

$ 222.90 USD
Free Shipping
Sale - Save 18%
$ 272.99

This product was last offered at the strikethrough price on
06-23-2026

$ 222.90 USD
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This kit covers many of the common wear items that should be changed any time the serpentine belt is being replaced. As these cars gain years and mileage the belt tensioners will also need to be replaced along with the actual belts. It won't do any good to replace the belt if the tensioners are worn. This kit will save you time and money over buying these pieces individually. This kit includes an updated hydraulic alternator tensioner for added reliability and longevity.
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