This is the main belt tensioner for A/C, Alternator, and power steering.
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Everything you need to service your belt drive system using genuine BMW components
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Worn hardware should be replaced before it fails
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Secures the top of the hydraulic alternator belt tensioner assembly to the bracket
Replacement pulley for your accessory belt tensioner - Doesn not include the arm or hydraulic tensioner
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...or at least as "Bulletproof" as your E9X N55 will ever be! Includes a crank bolt capture kit, crank seal plate, oil filter housing gaskets, and all of the components required to perform this upgrade service.
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Brand:
ES#:
4365385
Mfg#:
ECSE90N55BPKT
In Stock
ON SALE!
$573.99
This product was last offered at the strikethrough price on 03-19-2026
An important belt drive component
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4845404
Mfg#:
11287578675
In Stock
ON SALE!
SAVE 21%
$27.99
This product was last offered at the strikethrough price on 05-02-2026
Our Kevlar accessory Belts are a performance alternative to a traditional belt. Replaces BMW # 11287841529
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Secures the belt tensioner
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes! 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
