Updated hydraulic tensioner from BMW which replaced the older style mechanical tensioner
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This is the main belt tensioner for A/C and alternator
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Brand:
ES#:
4343010
Mfg#:
11287594969
Ships in 2 Business Days
$96.99
This product was last offered at the strikethrough price on 08-13-2026
Includes tensioner & roller for accessory belt
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Brand:
ES#:
4920135
Mfg#:
11281742858
Ships in 2 Business Days
$83.99
This product was last offered at the strikethrough price on 05-07-2026
Applies tension to the accessory belt to prevent slippage
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Brand:
ES#:
4766336
Mfg#:
11288580360
Ships in 2 Business Days
$177.99
This product was last offered at the strikethrough price on 05-07-2026
Drives the alternator, water pump, and power steering pump
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Everything you need to service your belt drive system using quality aftermarket components
10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
Brand:
ES#:
3647892
Mfg#:
11281706545KT
Ships in 8 Business Days
ON SALE!
SAVE 13%
$367.53
This product was last offered at the strikethrough price on 06-23-2026
Replace that worn down belt tensioner
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Brand:
ES#:
21763
Mfg#:
11287549588
Ships in 1-2 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 10-26-2026
Keep your alternator turning properly.
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Does not include hydraulic tensioner
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Brand:
ES#:
21599
Mfg#:
11281407520
Special Order: No Guaranteed ETA
3% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$320.99
This product was last offered at the strikethrough price on 10-26-2026
Used to tension the air conditioning compressor drive belt
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Drives the alternator, water pump, and power steering pump.
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Replacement is recommend with every belt service
2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply We Price Match - Give Us A Call or Chat!
Provides tension between crank pulley and A/C compressor
Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply We Price Match - Give Us A Call or Chat!
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.
Lifetime Replacement
