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BMW Drive Belts & V-Belts for BMW 3 Series E93 (2007-2013)

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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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OEM Accessory Belt Service Kit - N54 3.0L

10X Entries Into Our F80 M3 Sweepstakes

T#:554448

Part#: N54ACCKT

Ships in 1 Business Day

Sale - Save 5% $ 197.99

This product was last offered at the strikethrough price on
04-15-2026

$ 187.11 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

T#:567679

Part#: 11287582946KT4

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$ 213.63 USD

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$ 213.63 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 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

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

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Sale - Save 22%

$ 135.99

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

$ 105.43 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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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW E82/88 E9X...

10X Entries Into Our F80 M3 Sweepstakes

T#:22163422

Part#: 11287568247TKT

Ships on Nov 12, 2026

Sale - Save 15% $ 209.99

This product was last offered at the strikethrough price on
04-15-2026

$ 178.94 USD

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Sale - Save 15%

$ 209.99

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$ 178.94 USD

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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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Lower Idler Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:32350850

Part#: 11287557851

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Sale - Save 15% $ 27.99

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

$ 23.79 USD

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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW N52 ...

10X Entries Into Our F80 M3 Sweepstakes

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

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Sale - Save 18%

$ 127.99

This product was last offered at the strikethrough price on
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$ 104.71 USD

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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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Accessory Belt Tensioner Assembly

10X Entries Into Our F80 M3 Sweepstakes

T#:29101657

Part#: 11287563927

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Sale - Save 17% $ 69.99

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

$ 57.79 USD

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Upper Idler Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:26305073

Part#: 11287556251

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Sale - Save 25% $ 31.99

This product was last offered at the strikethrough price on
07-14-2026

$ 23.99 USD

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$ 31.99

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$ 23.99 USD

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N54 AC Delete Accessory Belt Kit - BMW N54 3.0L

10X Entries Into Our F80 M3 Sweepstakes

T#:26771665

Part#: 7PK1660KT

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Sale - Save 13% $ 75.99

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

$ 66.28 USD

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$ 75.99

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$ 66.28 USD

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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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Deflection Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:34080699

Part#: 11287578674

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Sale - Save 21% $ 28.99

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

$ 22.84 USD

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Bremmen Belt Tensioner Assembly -- E60 E61 E70 E82 E88 E9X Z4 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:39497969

Part#: 11287530314

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Sale - Save 21% $ 54.99

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

$ 43.24 USD

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$ 54.99

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This tensioner keeps the belt for the alternator, power steering, and air conditioning taut to provide maximum performance of each system.

Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW E82/88 E9X...

10X Entries Into Our F80 M3 Sweepstakes

T#:22163417

Part#: 11287582946TKT

Ships on Nov 12, 2026

Sale - Save 5% $ 223.99

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

$ 212.39 USD

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$ 223.99

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$ 212.39 USD

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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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Idler Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:34080698

Part#: 11287578675

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Sale - Save 21% $ 27.99

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05-03-2026

$ 22.02 USD

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$ 27.99

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$ 22.02 USD

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Alternator Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:52164889

Part#: 12317560483

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Sale - Save 15% $ 45.99

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

$ 39.09 USD

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$ 39.09 USD

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Is your BMW making a chirping or grinding noise at idle? The culprit is frequently a failing alternator decoupler pulley. Unlike a traditional solid pulley, this Overrunning Alternator Pulley (OAP) allows the alternator rotor to "freewheel" when engine speeds drop suddenly. This specialized function protects your BMW drive belt and belt tensioner from excessive snap-back, vibration, and "belt slap."

Prevent Catastrophic Engine Failure

Over time, the internal clutch mechanism can seize or slip, leading to accelerated wear or total serpentine belt failure. On BMW engines, a snapped belt can be ingested through the front main seal, causing catastrophic engine damage. Replacing this pulley is a cost-effective preventative maintenance step that restores smoothness to your accessory drive without the high cost of a complete alternator replacement.

Features & Benefits:

Lowers the load on the drive belt, tensioner, and AC compressor.
Stops "belt slap" and rhythmic chirping noises during deceleration and idle.
Direct Replacement with high-quality construction ensures perfect fitment and long-term durability.
Essential Maintenance for N52 engines

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Accessory Belt Tensioner Assembly

10X Entries Into Our F80 M3 Sweepstakes

T#:54995068

Part#: 11287582946

In Stock

Sale - Save 10% $ 52.99

This product was last offered at the strikethrough price on
10-08-2026

$ 47.69 USD

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$ 52.99

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$ 47.69 USD

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Double roller tensioner

Idler Pulley

For vehicles with a production date up to 04/2008

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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Deflection Pulley

10X Entries Into Our F80 M3 Sweepstakes

T#:26305076

Part#: 11287535860

In Stock

Sale - Save 19% $ 20.99

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

$ 16.99 USD

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Sale - Save 19%

$ 20.99

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

$ 16.99 USD

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