2004 BMW 330CI Engine cooling Problems

“I have a 6-speed manual transmission 330cic and when I put the gear into neutral at a stop the engine RPM would dip drastically and stalls several times in traffic. Periodically the engine RPM would dip so rapidly that the engine stalls from idle position. This can happen in the driveway or on a road at an 4-way light. Basically anytime the engine is at idle there is a potential for stalling. I experienced stalls in heavy traffic as well as sitting at a stop light.”

“Bmw 2004 330CI. The oil light comes up every 400-500 or 700-800 miles depending if it is driven in the city or highways. 2 different dealers checked the car and replaced the oil level sensor, crankcase vent valve, vent pipe, vent hose, return pipe, wash pump so far but the car still having the problem. Car goes to the dealer once a month approx.”

“Bmw 330i exhibits frequent erratic idle when stopped, as well as engine stalling. Erratic idle is in the form of engine speed drops below 400-500 RPM. Stalling sometimes occurs as a result of these idle speed drops. This is a common issue among recent 330 model Bmw's, and apparently there is no known solution at this time.”

“While driving, the car shook violently, the engine rattled and the car lost engine power; the check engine light went on. The car became immediately un drivable. It was later determined that one of the cylinders in the car misfired and completely shut down, sending the engine into a complete unbalance.”

“The car (2004 330i zhp) often shudders at start up with an erratic idle and continues to do so even when warm. There are no computer fault codes and no check engine light. It feels as if it is ready to stall at any given time with severe idle fluctuations of 100-200 RPM's during stops. Problem is widespread across dozens of zhp (performance package) owners as well as many 2003 and 2004 3 series car owners, particularly those with manual transmissions.”