2002 BMW 325i Q&A
2002 BMW 325i Question: how many driving cycles
You just a couple of drive cycles with various driving activities. What repair was made? If it's for smog you have to have 5/7 readiness monitors ready to pass. - Hal...
Try this: Make sure the fuel level is between 1/4 and 3/4 and the engine is cold. Start engine, idle cold for approx. 2 min, 10 secs. Accelerate to 20-30 MPH, Maintain steady speed for approx 3 min, 15 secs. Accelerate to 40-60 MPH, Maintain steady speed for approx 15 mins. Decelerate and come to a stop. Idle in gear for approx 5 mins. WARNING! It is absolutely essential to keep the RPM's below 3,000 and the MPH below 60 for the duration of this test! This won't be easy to do, unless you have access to a dyno or a race track, since traffic conditions could ruin the whole procedure and you have to start again with a cold engine. Zee - ZeeTech
I think you spend too much money for someone to fix your check engine light. I only replaced my water thermostat to fix my 2002 BMW 325i check engine light. I drove for at least 100 miles for the computer to reset. My car passed the smog check that year and never had problem again. hope this help you, - Visitor