Dual Mass Flywheel, OEM - E39 540i (from 6/1996)

This part is listed by BMW as BMW part number 21201223581 (21-20-1-223-581) and is described as Twin Mass Flywheel for the 1997, 1998, 1999, 2000, 2001, 2002 and 2003 model 540i sport 6 speed manual.

Modern BMWs use a dual mass flywheel (DMF) to dampen driveline vibrations and help make clutch operation smoother, but as many BMW owners realize, they don't last forever. Sachs, an OEM supplier to BMW, recommends replacing the DMF with every other clutch. But in some cases the clutch has been abused so much that damage extends to the flywheel. If you're planning a clutch job consider also buying a new flywheel to have on hand.

There are symptoms of BMW DMF failure and needs to be replaced: build-up of clutch material or damage to the clutch contact surface, excessive play between the two halves of the DMF (if the outer flywheel section can rotate more than 20mm in either direction), and grease leaking out from inside the flywheel assembly. A worn DMF does not just impact performance or clutch operation, it's a big safety issue as well. A DMF that breaks apart can be catastrophic to the transmission as well as dangerous to the driver and passenger.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.

BMW Fitments:

5 Series
E39 (97-03) > 540i