Question: "This is the second BMW I have had with leaks. Is leaking a common problem on BMWs?"
Answer: It's a common issue on all cars. Drainage holes get blocked, rubber and plastic parts perish or harden, clips and grommets come loose. To us, it seems worse on some cars than others, but it can be hard to tell. Do we see more leaks on one car because those cars have lots of leaks, or because there are lots of those cars? Having said that, there are definitely some known problems we keep seeing, but BMW wouldn't be in the top ten of leaky cars.