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BMW E83 X3 3.0L Hydraulic Alternator Belt Tensioner Kit

BMW changed the alternator belt tensioner design from a failure-prone, less reliable mechanical setup to a hydraulic unit for all their latest models.

In fact, BMW service will only replace your tensioner with the updated design, as the older unit has been discontinued.

If you are experiencing problems with your tensioner, or are replacing your alternator belt and want the latest, most reliable setup, ECS offers Hydraulic Alternator Belt Tensioner Conversion Kits to get the job done.

Each kit includes everything required for a thorough conversion to the new hydraulic system.


A Clever Upgrade

Fits:BMW
E83 X3 2.5i 2004-2006
E83 X3 3.0i 2004-2006

Hydraulic Alternator Belt Tensioner Conversion Kit
Complete conversion kit for converting alternator tensioner over to the more reliable hydraulic tensioner design
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 517967
Mfg#: 11287838797

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Availability:
In Stock
On SALE
$113.99

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

$110.42 USD
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This product is lifetime replacement eligible Lifetime Replacement
Accessory Belt - Alternator/Water Pump/Power Steering Belt - 6K1538
Drives critical components
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Brand: Continental - Corporate Logo
ES#: 10334
Mfg#: 11281706545

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Availability:
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$20.19 USD
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on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
Accessory Belt - Alternator/Water Pump/Power Steering Belt
Drives critical components
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand: Genuine BMW - Corporate Logo
ES#: 2678566
Mfg#: 11287636379

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Availability:
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10% off MSRP

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


$69.99
$62.99 USD
Free Shipping Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
Accessory Belt Service Kit
Utilizes high quality aftermarket components
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand: Assembled By ECS - Corporate Logo
ES#: 2695520
Mfg#: 11287838797KT1

Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.

Availability:
Back Ordered
Auto Notify
On SALE
$193.99

This product was last offered at the strikethrough price on
06-10-2026

$184.18 USD
Free Shipping Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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