Recently purchased a used 1997 Z3. It was listed as a 2.8, however on reading the service manual I found that the engine code in the VIN (CJ33) indicated a 1.9. Well, there are definitely 6 cylinders so it is not a 1.9. Can anyone explain this ? Really enjoy the car. It's in excellent condition even with 116K miles, no rust. A few cosmetic pblms. haven't gotten into anything under the car yet. One front ball joint is showing some wear and I'm waiting for new door strikers. Seems like a lot of others are waiting also. Would appreciate any hints or suggestions. I'm a newbie to BMWs, but was a service engineer for a German machine tool company so I realize that German engineering can be a bit convoluted till you figure it out.