Original BMW Flywheel Bolt M12x1.5x25, BMW 1 to 5 Series, M2, M3, M4, X3, and Z4 (2006–2021)

Made to BMW's M12x1.5x25 specification, the Original BMW flywheel bolt 11-22-7-520-706 secures the flywheel to the crankshaft on N20, N51, N52, N54, N55, and S55 engines in BMW 1 to 5 Series, M2, M3, M4, X3, and Z4 models from 2006–2021. BMW calls this fastener an ISA screw, and it weighs 32 g. It is a one-time-use bolt, meant to be replaced whenever the clutch and flywheel come off. A flywheel bolt carries the rotating load between the crankshaft and flywheel, so it takes engine torque and clutch engagement forces every time the car pulls away. It is made in Germany and sold individually, priced each.

Original BMW Parts carry a 24-month parts warranty.

Production of this number started in June 2004, and BMW uses it across a broad run of four- and six-cylinder engines from the N52 through the S55 in the F80 M3 and F82 M4. A loose or improperly secured flywheel can show up as clutch slippage or vibration, or as knocking and rattling from the transmission area, and a sheared bolt or detached flywheel can cause severe engine or transmission damage. Because the bolt is single use, buy a full set for your flywheel rather than reusing the old ones.

Technical Details

• Manufacturer: BMW (Genuine BMW part)
• Part number: 11-22-7-520-706
• BMW part name: ISA screw
• Thread and length: M12x1.5x25 mm
• Weight: 32 g (1.13 oz)
• Production start: June 2004
• One-time use
• Made in Germany
• Sold individually
• Warranty: 24 months

Common Questions

Can I reuse my old flywheel bolts?
No. This is a one-time-use bolt and should be replaced with every clutch job.

Is it sold as a set?
No. It is priced and sold as a single bolt.

Fitment & Compatibility

Use the fitment table below to confirm year, model, submodel, and application notes before ordering. PMB Performance has spent over 20 years matching parts to vehicles and can verify this against your VIN.