Original BMW Flywheel Bolt M12x1.5x25.5 for 2, 3, and 4 Series and X1, X2, X3, X4, and X5 (2014–2025)

BMW uses this Original BMW M12x1.5x25.5 hex bolt to secure the flywheel or automatic transmission flexplate on 2, 3, and 4 Series cars and X1, X2, X3, X4, and X5 models. Each bolt weighs 33 grams, and BMW has produced this number since March 2007. It is made in Germany and priced and sold individually. Flywheel and flexplate bolts clamp the drive plate to the end of the crankshaft, so they carry every bit of engine torque into the transmission.

Original BMW Parts carry a 24-month parts warranty.

BMW's official name for the part is simply "hex bolt," and the size code M12x1.5x25.5 describes a 12 mm thread at 1.5 mm pitch with a 25.5 mm length. That size is what separates it from other fasteners around the crankshaft flange. The bolt spans a wide range of BMW engines, including the B46, B48, and B58 gasoline engines and the N47, B47, N57, and B57 diesels, and it covers both the F-chassis and later G-chassis generations. On the US models that PMB carries it for, that means four-cylinder cars such as the 230i, 330i, 430i, and X1 xDrive28i, six-cylinder B58 cars such as the 340i, 440i, M240i, and X5 xDrive40i, and the X3 xDrive28d and X5 xDrive35d diesels.

Technical Details

• Manufacturer: BMW
• Part number: 11-22-7-797-966
• BMW name: hex bolt
• Size: M12x1.5x25.5
• Weight: 33 g (1.16 oz)
• Production start: March 2007
• Application: flywheel or transmission flexplate
• Made in Germany
• Priced and sold individually
• Warranty: 24-month parts warranty

Common Questions

Is this bolt used on automatic transmission cars?
Yes. It secures the transmission flexplate.

Do the 340i and the X5 xDrive40i share this bolt?
Yes. Both use the B58 engine, and this bolt is specified for each.

Does one order cover the whole flywheel?
No. Each bolt is priced and sold individually, so order the full count your car needs.

PMB Performance ships Genuine BMW driveline hardware for late-model B-series cars every day.

Fitment & Compatibility

Compare your production year and trim against the table below. With over 20 years of parts and fitment experience, PMB Performance can match this to your VIN.