Same problem on my 2002 325i
I bought my first BMW 2002 325i about 3 months ago.Its done 95000kms. After the first month, it started giving me EML Traction and Brake lights while driving. when these lights come on, the car would lose power and wont be able to drive. It became very often that I had to take it into a independent BMW specialist. Scanned the code, and it came up as jammed throttle body.
So they recommend to replace the throttle body. (the old throttle body in there was still looking very clean, to my understanding, the previous owner may have replace the throttle body about a year ago).
After the new throttle body was fitted, the car drives well for about 2 weeks and it start having the same problem again, but less often. Took it in again the have the code scanned. scan result came back like before: jammed throttle body.
This time they think possibly the ASC/ABS module is faulty, which trigger the throttle body. The computer never show any code relating to the ABS module.
Anyone with such knowledge, experiences, please HELP.