OEM Accessory Belt Service Kit - F3X F22/23 N55 3.0L

T#:587391

Part#: 11287628661ABKT

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$ 171.99

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06-09-2026

$ 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.

Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW N55 F-Chas...

T#:22097553

Part#: 11287628661TKT

In Stock

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

$ 101.98 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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E9X M3 Performance Underdrive Pulley Kit

T#:593749

Part#: 10.00.011

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$ 349.00 USD

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Free additional power to your M3’s rear wheels without sacrificing or compromising your BMW’s reliability. Machined from 6061-T6 aerospace aluminum, Macht Schnell Performance Underdrive Pulleys are strong as well as lightweight to limit parasitic drag from the accessories within a moderate level for maximum performance on or off the track. After machining and engraving, pulleys are then T3 hard anodized for additional strength, anti-corrosion & wear resistance. Our DualDrive design replaces the Crank Accessory & Power Steering Pulleys, resulting in an additional 9-14 HP and 7-9ft. lbs TQ gain for the M3. Gains are due to a reduction in power required to turn accessories; an increase in accessories lifespan due to lower speed will also result. All factory harmonics/balancing are undisturbed. Macht Schnell Performance Underdrive Pulleys have no negative effect on accessory operation and comes fully equipped with new belts. Already have this kit and need new belts? See T#14491 and T#14489 Performance Underdrive Pulleys Features: DualDrive design allows maximum performance, with minor effect on accessory speed Proper cooling temperatures are retained at proper levels on or off the track Maintains proper alternator speed, allowing sustained levels to sensitive control modules Machined from 6061-T6 aerospace aluminum T3 Hard-Anodized for maximum strength and corrosion/wear resistance No affects to crankshaft dampening or harmonics Simple bolt-on installation

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OEM Accessory Belt Service Kit - N54 3.0L

T#:554448

Part#: N54ACCKT

In Stock

Sale - Save 15% $ 197.99

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

$ 169.24 USD

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$ 197.99

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$ 169.24 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

T#:567679

Part#: 11287582946KT4

Ships in 2 Business Days

Sale - Save 3% $ 212.99

This product was last offered at the strikethrough price on
03-19-2026

$ 205.87 USD

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$ 205.87 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 - F3X F10 N20 2.0L

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

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$ 62.94 USD

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This kit includes the basic components recommended to replace when it comes time to swap out your accessory belt.

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

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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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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OEM Accessory Belt Service Kit - N52 3.0L

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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$ 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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Hydraulic Alternator Belt Tensioner Assembly

T#:396757

Part#: 11287838797

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$ 53.99 USD

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$ 53.99 USD

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Friction Wheel N12 N14 N16 N18 1.6L Engine

T#:591689

Part#: 11287598833

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$ 84.99 USD

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$ 84.99 USD

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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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URO Drive Belt Tensioner W/ Pulley - BMW F8X M2 M3 M4

T#:50066851

Part#: 11288088632

In Stock

$ 60.99

This product was last offered at the strikethrough price on
08-13-2026

$ 60.97 USD

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Replaces broken or damaged drive belt tensioner.

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

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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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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N54 AC Delete Accessory Belt Kit - BMW N54 3.0L

T#:26771665

Part#: 7PK1660KT

In Stock

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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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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URO Crankshaft Vibration Damper - 11237573655

T#:28171559

Part#: 11237573655

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$ 341.99 USD

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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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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - F3X F10 N20 2....

T#:22097555

Part#: 11287618848TKT

In Stock

Sale - Save 34% $ 106.99

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

$ 70.48 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 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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OEM Accessory Belt Service Kit - E30 M20

T#:554430

Part#: 64521706826KT1

In Stock

$ 201.62

This product was last offered at the strikethrough price on
05-26-2026

$ 194.08 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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Crankshaft Pulley

T#:591616

Part#: 11281735358

Ships in 1 Business Day

$ 98.99 USD

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$ 98.99 USD

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Reduces vibrations and connects accessories

URO Aluminum Water Pump Pulley - E39, E46, E53, E60, E83, Z3, Z4 ...

T#:340641

Part#: 11511436590

In Stock

$ 45.99 USD

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$ 45.99 USD

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An upgrade over commonly failing plastic pulley

Accessory Belt Service Kit - E39 E46 M54 (2002+)

T#:401685

Part#: 11287512762KT3

In Stock

Sale - Save 3% $ 228.99

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

$ 222.24 USD

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06-23-2026

$ 222.24 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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URO Hydraulic Belt Tensioner - BMW E9X M3, E60 M5, E63 M6

T#:48573724

Part#: 11287835417

Ships in 1 Business Day

$ 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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Power Steering Pump Pulley

T#:592383

Part#: 32421722555

Ships in 1 Business Day

$ 90.99 USD

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$ 90.99 USD

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Driven by serpentine accessory belt

OEM Accessory Belt Service Kit - F10 F12 F13 F15 F16 F01 F02 ...

T#:554454

Part#: N55BMWKT

Ships in 2 Business Days

Sale - Save 8% $ 200.99

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

$ 185.68 USD

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$ 200.99

This product was last offered at the strikethrough price on
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$ 185.68 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.

For vehicles with dynamic or adaptive drive

Fits the following BMWs:
F01/02 BMW 740i/Li/Li xDrive
F10 BMW 535i/i xDrive
F12/3 BMW 640i/i xDrive
F15 BMW X5 s/xDrive35i
F16 BMW X6 s/xDrive35i

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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - F8X S55 ...

T#:22163426

Part#: 11287848605TKT

Ships on Nov 12, 2026

$ 414.99

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

$ 380.99 USD

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$ 380.99 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 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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Idler Pulley

T#:26271781

Part#: 11288673720

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$ 29.99 USD

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$ 29.99 USD

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Accessory Belt Service Kit w/ Kevlar Reinforced Belt - F22/23 F3X B58...

T#:22097533

Part#: 11288613707TKT

Ships on Nov 12, 2026

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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$ 137.99

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$ 105.35 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 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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Drive Wheel For Water Pump

T#:5760271

Part#: 11517619020

Ships in 1 Business Day

$ 42.01 USD

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$ 42.01 USD

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

T#:22163417

Part#: 11287582946TKT

Ships on Nov 12, 2026

$ 221.92 USD

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$ 221.92 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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Mechanical Belt Tensioner - NTN/NSK Bearings

T#:591687

Part#: 11287571015

In Stock

$ 53.99 USD

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$ 53.99 USD

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Accessory Belt Tensioner Assembly

T#:591622

Part#: 11287563927

In Stock

$ 60.99 USD

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$ 60.99 USD

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This is the main belt tensioner for A/C, Alternator, and power steering.

Water Pump Pulley

T#:638798

Part#: 11517840403

Ships in 1 Business Day

$ 57.99 USD

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$ 57.99 USD

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Crankshaft Pulley With Vibration Damper

T#:593668

Part#: 11237564969

Back Ordered

$ 234.99 USD

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$ 234.99 USD

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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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S54 Turner Motorsport Ultimate Power Pulley And Drive Belt Overhaul S...

T#:15710772

Part#: 11281730349-KT

In Stock

Sale - Save 1% $ 499.99

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

$ 494.69 USD

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$ 494.69 USD

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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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OEM Accessory Belt Service Kit - E9X M3 S65

T#:391554

Part#: 11287837898

Ships in 1-2 days

Starting at $ 964.99 USD

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Starting at $ 964.99 USD

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This comprehensive kit includes both belts, belt tensioners, upper and lower deflection pulleys, and the adjusting pulley. Select from all Genuine BMW parts or a combination of OEM/OE BMW parts. Staying on top of your belt maintenance is the smart move. Cracked or worn belts are a recipe for a headache or worse. The main drive belt runs critical components - the alternator, water pump, and power steering pump. The pulleys contain bearings that may be worn when it comes time to replace the belts. You can check the pulleys by relieving tension on the belt and feeling each pulley for play or grinding. The tensioner also sees similar wear. If your pulleys are new or don't need replacement, you can pick up the belts on their own.

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OEM Accessory Belt Service Kit - B46/48 B58

T#:587399

Part#: 112886137071ABKT

Ships in 1-2 days

Sale - Save 14% $ 121.99

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

$ 104.38 USD

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$ 121.99

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05-03-2026

$ 104.38 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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N54 "Bulletproof" Crank Hub & Serpentine Kit - BMW E82/88 E9X N54 3.0...

T#:1241396

Part#: TMSN54BPKT

Back Ordered

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

$ 512.81 USD

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$ 541.99

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$ 512.81 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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Idler Pulley

T#:37892100

Part#: 11287578675

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$ 28.54 USD

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The idler pulley serves as a guide and support for the serpentine belt, ensuring it runs smoothly over the entire system.

Hydraulic Alternator Belt Tensioner Conversion Kit

T#:15710833

Part#: 11287838797-KT

In Stock

Sale - Save 1% $ 165.99

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

$ 163.64 USD

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$ 165.99

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$ 163.64 USD

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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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A/C Tensioner Pulley

T#:373241

Part#: 11282245087

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$ 26.99 USD

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$ 26.99 USD

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The A/C drive belt is tightened buy a separate belt tension.

Accessory Belt Service Kit w/ Kevlar Reinforced Belt - E36 Z3 M52 S52...

T#:22130428

Part#: 11281437929TKT

Ships on Nov 12, 2026

Sale - Save 8% $ 264.99

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

$ 244.54 USD

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$ 264.99

This product was last offered at the strikethrough price on
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$ 244.54 USD

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Eliminate your squeaking accessory belt pulleys and cracked drive belts with this upgraded accessory belt service kit! This kit includes the ECS Kevlar Reinforced Drive Belt, an OEM A/C belt, belt tensioners, an idler pulley, and the hardware required for installation 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 belts, rollers, and 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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OEM Accessory Belt Service Kit - E46 E39 E53 M54 (Pre-09/2002) ...

T#:554446

Part#: M54ACCKT2

In Stock

Sale - Save 3% $ 256.99

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

$ 249.51 USD

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Sale - Save 3%

$ 256.99

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

$ 249.51 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:
2000-09/2002 E53 BMW X5 M54
2000-09/2002 E39 BMW M54
1999-09/2002 E46 BMW M54

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Performance Accessory Belt Kit - Kevlar Reinforced - BMW B46TU/B48TU...

T#:29798952

Part#: 11288650740T1KT

Ships on Nov 12, 2026

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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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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Belt Tensioner Conversion Kit

T#:600039

Part#: 11287838797K

Back Ordered

$ 82.99 USD

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$ 82.99 USD

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Update from a mechanical tensioner to a hydraulic style tensioner

N55 "Bulletproof" Crank Hub & Serpentine Kit - BMW E82/88 E9X N55 3.0...

T#:1241397

Part#: TMSE90N55BPKT

Ships in 2 Business Days

$ 602.41 USD

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$ 602.41 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

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OEM Accessory Belt Service Kit - E39, E46 M54 (up to 2002)

T#:401686

Part#: 11281748131KT2

In Stock

Sale - Save 3% $ 272.99

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

$ 265.58 USD

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Sale - Save 3%

$ 272.99

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

$ 265.58 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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Crank Pulley With Dampener for MINI R5X R6X

T#:591628

Part#: 11237562801

In Stock

$ 72.00

This product was last offered at the strikethrough price on
07-28-2026

$ 49.78 USD

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$ 49.78 USD

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Enhance your Mini's engine performance with this essential Engine Harmonic Balancer/Vibration Dampener. Designed to smooth out rotational vibrations from the crankshaft, this pulley-driven unit ensures optimal engine operation. When worn, it may produce unusual noises near the passenger's side oil pan, signaling the need for replacement. For comprehensive maintenance, it's advisable to change the hex bolts along with the unit. Benefit from:

Improved engine performance.
Reduction of rotational vibrations.
Prevention of unusual noises.
Compatibility with Mini vehicles.
Easy replacement process.

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URO Upper Idler Pulley - BMW N54 3.0L

T#:591621

Part#: 11287556251

In Stock

$ 28.89 USD

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$ 28.89 USD

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The higher idler pulley

Accessory Belt Service Kit w/ Kevlar Reinforced Belt - BMW E60 N54 3....

T#:22163416

Part#: 4485241TKT

Ships on Nov 12, 2026

Sale - Save 23% $ 177.99

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

$ 136.47 USD

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Qty

Sale - Save 23%

$ 177.99

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

$ 136.47 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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