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BMW E46 323Ci M52 2.5L

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BMW E46 323Ci M52 2.5L Engine Drive Belt Parts

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Hydraulic Alternator Belt Tensioner

ES#21655 - 11281717188 - Hydraulic Alternator Belt Tensioner - Hydraulic tensioner for alternator belt, ideal for servicing high mileage tensioner - Genuine BMW - BMW

Hydraulic tensioner for alternator belt, ideal for servicing high mileage tensioner

Brand:
Genuine BMW - Corporate Logo
ES#:
21655
Mfg#:
11281717188
Ships in 3 Business Days
6% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$165.99

This product was last offered at the strikethrough price on
07-20-2026

$155.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Idler Pulley

ES#2534805 - 11281748130 - Idler Pulley - Runs on water pump and alternator belt, used on both mechanical and hydraulic tensioner systems - URO - BMW

Runs on water pump and alternator belt, used on both mechanical and hydraulic tensioner systems 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2534805
Mfg#:
11281748130
Ships in 1 Business Day
$18.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Hydraulic Alternator Belt Tensioner Roller

ES#2534799 - 11281748131 - Hydraulic Alternator Belt Tensioner Roller - Replacement is recommend with every belt service - URO - BMW

Replacement is recommend with every belt service 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2534799
Mfg#:
11281748131
In Stock
$14.83

This product was last offered at the strikethrough price on
04-06-2026

$13.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Protection Ring

ES#21663 - 11281730532 - Protection Ring - Seals the back side of the hydraulic alternator belt tensioner roller from debris - Genuine BMW - BMW

Seals the back side of the hydraulic alternator belt tensioner roller from debris

Brand:
Genuine BMW - Corporate Logo
ES#:
21663
Mfg#:
11281730532
In Stock
$3.89 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Accessory Belt Kit - Kevlar Reinforced

ES#4690532 - 11281748131-PKT - Performance Accessory Belt Kit - Kevlar Reinforced - Includes updated Hydraulic Tensioner and Kevlar Accessory Belt! - Assembled By ECS - BMW

Includes updated Hydraulic Tensioner and Kevlar Accessory Belt! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4690532
Mfg#:
11281748131-PKT
Ships on Aug 24, 2026
Auto Notify
ON SALE!
$263.99

This product was last offered at the strikethrough price on
05-02-2026

$241.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Accessory Belt Kit Service Kit

ES#2598797 - ADK0023P - Accessory Belt Kit Service Kit - Includes Contitech belts and high quality after market parts - Continental - BMW

Includes Contitech belts and high quality after market parts We Price Match - Give Us A Call or Chat!

Brand:
Continental - Corporate Logo
ES#:
2598797
Mfg#:
ADK0023P
In Stock at Vendor
$236.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Mechanical A/C Belt Tensioner Assembly

ES#21608 - 11281433571 - Mechanical A/C Belt Tensioner Assembly - Complete tensioner assembly with roller - Genuine BMW - BMW

Complete tensioner assembly with roller

Brand:
Genuine BMW - Corporate Logo
ES#:
21608
Mfg#:
11281433571
Ships in 3 Business Days
3% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$229.99

This product was last offered at the strikethrough price on
07-20-2026

$221.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Protective Cap For Belt Tensioner

ES#21660 - 11281727159 - Protective Cap For Belt Tensioner - Black plastic snap on cap - Genuine BMW - BMW

Black plastic snap on cap

Brand:
Genuine BMW - Corporate Logo
ES#:
21660
Mfg#:
11281727159
In Stock
$14.10 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Hydraulic Alternator Belt Tensioner Roller

ES#2776538 - 11281748131 - Hydraulic Alternator Belt Tensioner Roller - Replacement is recommend with every belt service - Vaico - BMW

Replacement is recommend with every belt service We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2776538
Mfg#:
11281748131
In Stock
ON SALE! SAVE 45%
$30.99

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

$17.09 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Hex Bolt With Washer - M8x35mm

ES#14743 - 07119905533 - Hex Bolt With Washer - M8x35mm - Secures mechanical A/C and alternator belt tensioner to bracket - Genuine BMW - BMW MINI

Secures mechanical A/C and alternator belt tensioner to bracket

Brand:
Genuine BMW - Corporate Logo
ES#:
14743
Mfg#:
07119905533
In Stock
$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Idler Pulley

ES#2873680 - 11287841228 - Idler Pulley - Runs on water pump and alternator belt, used on both mechanical and hydraulic tensioner systems - Febi - BMW

Runs on water pump and alternator belt, used on both mechanical and hydraulic tensioner systems 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2873680
Mfg#:
11287841228
In Stock
ON SALE!
$48.99

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

$47.52 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Protective Cap

ES#29427 - 12311713143 - Protective Cap - Protects the upper mounting bolt of the hydraulic alternator belt tensioner assembly from debris - Genuine BMW - BMW

Protects the upper mounting bolt of the hydraulic alternator belt tensioner assembly from debris

Brand:
Genuine BMW - Corporate Logo
ES#:
29427
Mfg#:
12311713143
In Stock
$1.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Drive Belt Tensioner with Pulley - A/C Compressor Belt

ES#2549761 - 11281433571 - Drive Belt Tensioner with Pulley - A/C Compressor Belt - Complete tensioner assembly - LUK - BMW

Complete tensioner assembly We Price Match - Give Us A Call or Chat!

Brand:
LUK - Corporate Logo
ES#:
2549761
Mfg#:
11281433571
Ships in 7 Business Days
$67.99

This product was last offered at the strikethrough price on
04-07-2026

$66.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Hydraulic Alternator Belt Tensioner

ES#2813357 - 11281717188 - Hydraulic Alternator Belt Tensioner - Hydraulic tensioner for alternator belt, ideal for servicing high mileage tensioner - Hamburg Tech - BMW

Hydraulic tensioner for alternator belt, ideal for servicing high mileage tensioner We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2813357
Mfg#:
11281717188
Ships in 1 Business Day
ON SALE!
$46.99

This product was last offered at the strikethrough price on
06-25-2026

$44.64 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Belt tensioner pitman arm

ES#21658 - 11281726773 - Belt tensioner pitman arm - Provides a smooth tensioner movement - Genuine BMW - BMW

Provides a smooth tensioner movement

Brand:
Genuine BMW - Corporate Logo
ES#:
21658
Mfg#:
11281726773
Ships in 3 Business Days
2% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$60.99

This product was last offered at the strikethrough price on
07-20-2026

$59.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Tensioner Pully- New

ES#2813364 - 11281748130 - Tensioner Pully- New - Runs on water pump and alternator belt, used on both mechanical and hydraulic tensioner systems - Hamburg Tech - BMW

Runs on water pump and alternator belt, used on both mechanical and hydraulic tensioner systems We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2813364
Mfg#:
11281748130
Ships in 1 Business Day
$20.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Drive Belt Parts

Drive belts transfer crankshaft power to various accessories, including the alternator, water pump, power steering pump, and air conditioning compressor. Replacement of drive belts, serpentine belts, and drive belt tensioners at recommended service intervals helps you avoid untimely breakdowns and expensive vehicle repairs.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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