The 1999 BMW Z9 concept, powered by an M67 engine (3.9L Diesel V8). Its design served as a base for the E63 6-Series, which came out in 2003. Weird Wheels June 5, 2025— The 1999 BMW Z9 concept, powered by an M67 engine (3.9L Diesel V8). Its design served as a base for the E63 6-Series, which came out in 2003. byu/TurboDeez_Nuts_54 inWeirdWheels Share this:PocketRedditShare on TumblrPostEmailLike this:Like Loading... WANT MORE?!?