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BMW

Genuine BMW Belt Vibration Damper / Harmonic Balancer - OEM 11237800026 for E70 E71 F01 F02 F07 F10 F11 Diesel N57 (525d 530d 535d 730d 740d X5 40d X6 40d)

Genuine BMW Belt Vibration Damper / Harmonic Balancer - OEM 11237800026 for E70 E71 F01 F02 F07 F10 F11 Diesel N57 (525d 530d 535d 730d 740d X5 40d X6 40d)

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OE Crankshaft Pulley Balancer for BMW N57 Diesel Engines - Part No. 11237800026

Restore the silky-smooth feel your BMW is known for with this factory-original crank pulley balancer, BMW part number 11237800026 (also written as 11 23 7 800 026). Designed for N57-powered models, this front crankshaft pulley with integrated torsional vibration control stabilises the auxiliary drive, helping your straight-six diesel run quiet, refined and reliable.

Ideal for owners chasing down belt chirps, pulley wobble, idle shudder or unwanted NVH, this OE balancer safeguards the front-end accessory drive by reducing oscillation that can stress the alternator, power steering pump, A/C compressor, water pump and multi-rib belt. We have fitted this part on our own cars and countless customer vehicles with consistently excellent results in smoothness and longevity.

Why this OE crank pulley balancer

  • Original BMW component for precise fit and correct damping characteristics
  • Controls torsional vibration to keep the auxiliary belt tracking true
  • Quiets belt chatter and reduces cabin buzz for a more refined drive
  • Helps prevent premature wear of pulleys and the serpentine belt
  • Direct replacement for tired or cracked rubber-bonded balancer assemblies
  • Proven on our workshop cars and by happy MJ Modifications customers

Vehicle fitment

For BMW N57 3.0 diesel applications across:

  • 5 Series F10 Saloon and F11 Touring, plus F07 GT - 525d, 530d, 535d, xDrive variants
  • 7 Series F01 and F02 - 730d, 740d models
  • X5 E70 and X6 E71 - 30d and 40d derivatives

If you are unsure, we offer a quick compatibility check before dispatch. Provide your UK registration or the last 7 of your VIN at checkout.

Part details

  • BMW part number: 11237800026
  • Also referenced as: crank pulley, balancer pulley, torsional damper, harmonic dampener, vibration absorber, FEAD damper, front pulley
  • OE-spec replacement for the N57 auxiliary drive system

Symptoms this part cures

  • Squeal or chirp from the serpentine belt under load
  • Noticeable belt flutter or wandering
  • Harshness or shudder at idle and during overrun
  • Visible pulley wobble or perished rubber in the original balancer

Professional fitting

For best results, correct torque and alignment are essential. Book installation with MJ Modifications in Warwickshire. To request a quote or arrange fitting, email info@mjmodifications.co.uk.

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