One problem related to engine stall has been reported for the 2004 BMW X3. The most recently reported issues are listed below.
Dear NHTSA, I am writing today to tell you my personal epxerience with my car. I bought a brand new BMW 330ci on July 18, 2003. One week after the purchase, the transmission stopped to engage when I start up the car. After I brought it in for a fix, I was told it was fixed. Two months later, the same transmission problem came back again, and it was diagnosed to need replacement. In December 2003, the transmission is replaced after a few month's waiting for the new transmission. In may 2004, the car's engine stopped in traffic. And BMW told me it can not be diagnosed. From may 2004 to March 2005, the engine stall-in-traffic problem happened five times. No conclusive diagnostic was ever made. On oct 4, 2005, the transmission fails again in the morning. And all these problems listed here are just major safety issues, and does not include the small problems such as door guard completely falls off. At this point, after the problems of this car becomes chronicle, I feel that my safety is compromised, and bwm will not help me to solve the problem. Please help me! sincerely, jinwen xiao.