Keanu Reeves helmet car motorcycle accident Mercedes Keanu Reeves helmet car motorcycle accident Mercedes

Keanu Reeves escaped injury from a minor accident involving his motorcycle yesterday in Beverly Hills ... mostly because he wasn't at the scene!

While running errands in 90210, the Speed star had parked his bike behind a Mercedes SUV, and the driver apparently didn't notice.

Fortunately, there was only minor damage to the bike, and Keanu was able to take off. Bummer for the Mercedes driver ... it was a brand new ride.

The Beverly Hills police tell us nobody was cited.