Genuine BMW N55 Serpentine/Accessory Drive Belt Service Kit - F20 F21 F22 F23 F30 F31 F32 F33 F34 F36 F25 F26 - M135i M235i 335i 435i X3 35i X4 35i M40i - Belt, Tensioner & Idler - 11282457049

BMW N55 Auxiliary Drive Refresh Kit - F20 F21 F22 F23 F30 F31 F32 F33 F34 F36 F25 F26 - 1 Series 2 Series 3 Series 4 Series X3 X4 - Part No. 11282457049

Restore quiet, dependable running on your N55 3.0 turbo with this original equipment poly V belt package. This complete auxiliary drive solution replaces the ribbed belt, tensioner assembly and idler pulley in one smart purchase, curing squeaks, slips and charging issues while protecting alternator performance and power steering assistance on daily drives and spirited use.

Ideal if you are searching for BMW fan belt kit, poly-v belt kit, alternator belt kit, aux belt and pulley kit, belt tensioner set, idler pulley kit or N55 belt replacement. This OE-spec set is the one we fit to our own cars and customer vehicles, delivering a smooth, quiet accessory drive and long-term reliability.

Why this OE kit

• Factory-correct alignment and length for the N55 auxiliary drive
• Eliminates belt chirp on cold start and slip under load
• Prevents low voltage warnings from a glazing or stretched belt
• Do it once, do it right with matched components engineered to work together

Customers consistently report reduced noise, improved refinement and confidence on long trips after fitting this set. If your current belt shows cracking, fraying, shine or you have a rattly tensioner, this refresh is the fix to choose.

What you receive

• Ribbed auxiliary belt for N55
• Mechanical tensioner unit
• Deflection pulley idler
• New mounting bolt for correct installation torque

Fitment - N55 3.0 turbo models

• BMW 1 Series F20 04-2011 to 02-2015 - M135i, M135i xDrive
• BMW 1 Series F20 LCI 06-2014 to 06-2016 - M135i, M135i xDrive
• BMW 1 Series F21 12-2011 to 02-2015 - M135i, M135i xDrive
• BMW 1 Series F21 LCI 06-2014 to 06-2016 - M135i, M135i xDrive
• BMW 2 Series F22 10-2012 to 06-2016 - M235i, M235i xDrive
• BMW 2 Series F23 03-2014 to 06-2016 - M235i, M235i xDrive
• BMW 3 Series F30 04-2011 to 07-2015 - 335i, 335i xDrive
• BMW 3 Series F31 08-2011 to 06-2015 - 335i, 335i xDrive
• BMW 3 Series F34 GT 07-2012 to 06-2016 - 335i, 335i xDrive
• BMW 4 Series F32 11-2012 to 06-2016 - 435i, 435i xDrive
• BMW 4 Series F33 03-2013 to 06-2016 - 435i, 435i xDrive
• BMW 4 Series F36 07-2013 to 06-2016 - 435i, 435i xDrive
• BMW X3 F25 07-2009 to 08-2017 - xDrive35i
• BMW X4 F26 06-2013 to 03-2018 - xDrive35i, M40i

Helpful search terms

BMW N55 aux belt kit, BMW fan belt N55, poly v belt BMW 335i, belt tensioner BMW 435i, idler pulley BMW M135i, alternator belt BMW 3.0 turbo, drive belt set BMW F30, belt and pulley kit BMW F32, N55 belt service kit, BMW 2 Series belt kit, X3 35i belt kit, X4 35i belt tensioner, M40i belt and idler.

Part number

11282457049

Compatibility check

For peace of mind, add your UK registration or the last 7 digits of your VIN at checkout and we will verify suitability for your chassis before dispatch.

Professional fitting

Want it installed by specialists. MJ Modifications offers in-house fitting in Warwickshire. Email info@mjmodifications.co.uk for a quote and booking.

Manufacturer

BMW original equipment.

Warranty

Two years manufacturer warranty for UK customers and one year for international customers when a compatible VIN is provided at checkout.