Home
Engine Parts
Drive Belts, Pulleys, Tensioners

BMW Drive Belts & V-Belts for BMW G01 X3 xDrive30i B46 2.0L

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.

Sub-Categories

Sort By:

Accessory Belt Tensioner - Mechanical

10X Entries Into Our F80 M3 Sweepstakes

T#:32450133

Part#: 11288570439

In Stock

Sale - Save 20% $ 93.99

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

$ 75.06 USD

Add to Wish List

Qty

Sale - Save 20%

$ 93.99

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

$ 75.06 USD

Add to Wish List

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

10X Entries Into Our F80 M3 Sweepstakes

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

Add to Wish List

Qty

Sale - Save 24%

$ 137.99

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

$ 105.35 USD

Add to Wish List

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!

Show More Show Less

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

10X Entries Into Our F80 M3 Sweepstakes

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

Add to Wish List

Qty

Sale - Save 24%

$ 137.99

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

$ 105.35 USD

Add to Wish List

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

Show More Show Less

Accessory Belt Service Kit - HD Gates Belt - BMW B46TU/B48TU B58TU ...

10X Entries Into Our F80 M3 Sweepstakes

T#:29798950

Part#: 11288650740TKT

Ships in 1 Business Day

Sale - Save 13% $ 141.99

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

$ 123.62 USD

Add to Wish List

Qty

Sale - Save 13%

$ 141.99

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

$ 123.62 USD

Add to Wish List

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: Gates Green Heavy Duty Accessory Belt - Designed to exceed OE durability, felxibility, and longevity OEM Febi Belt Tensioner Genuine BMW Tensioner Hardware

Show More Show Less

Mubea Mechanical Accessory Belt Tensioner - BMW B46/48 B58

T#:26971839

Part#: 11288580360

Ships in 2 Business Days

$ 177.99

This product was last offered at the strikethrough price on
05-07-2026

$ 158.99 USD

Add to Wish List

Qty

$ 158.99 USD

Add to Wish List

Accessory belt tensioners provide tension to the belt drive system, ensuring the belt is able to properly turn engine accessories without slipping. If your tensioner has failed, replace it with a brand-new unit to ensure proper water pump and alternator functionality.

Show More Show Less

Accessory Belt Service Kit - OEM Continental Belt - BMW B46TU/B48TU B...

10X Entries Into Our F80 M3 Sweepstakes

T#:29798955

Part#: 11288650740T2KT

In Stock

Sale - Save 19% $ 121.99

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

$ 98.77 USD

Add to Wish List

Qty

Sale - Save 19%

$ 121.99

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

$ 98.77 USD

Add to Wish List

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: OEM Continental Accessory Belt OEM Febi Belt Tensioner Genuine BMW Tensioner Hardware

Show More Show Less