We've listed several engine code keys above but acknowledge there may be several other variations out there.īMW M GmbH were also slow to adopt newer code logic. The technology is changing so often that even the internal logic can't agree. Surprisingly, BMW does not often play by its own rules and follow its own corporate logic. The official motorsport race engines use a "P" code.Ĭlick on an image below to view the breakdown for each engine family.
The format now in use traces back to the mid-1980s. BMW engine codes are designed to provide a lot of information about the engine design and technology in a short amount of space. Standard BMW engines use a "M", "N", or "B" code. But as the range of BMW engines expanded they needed a more meaningful code designation. The engine codes used to be quite simple - M10 for four cylinder, M20 for small six cylinder, and M30 for the Big Six. BMW engines are known by their M, N, B, S, P, or W codes while BMW chassis and bodies are known by their E, F, G, or U codes. These code systems help keep planning and development organized and avoids confusion. For BMW these are known as chassis codes and engine codes. Yesterday I changed the injector no 5 again and carried out injector equalisation and the car ran perfect until I started it again after readindg faults which there wher non Submitted: 3 years ago.Every car manufacturer assigns an internal code designation to identify their vehicles. Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? It was smoking before and could smell fuel from the exhuat so replaced injectors 1,4,5,8 and tried injector equalisation it ran ok once but when I started again in the morning it was misfiring cyl 5 fault code 140501 I have changed spark plugs and a set of ignition coils from a n X5 5.o Mechanic's Assistant: Are you fixing your 750i yourself? What have you tried so far? Mechanic's Assistant: What year is your 750i? It will idle nicely and once you on the road and accelerate it will start jerking like fuel or spark starvation Mechanic's Assistant: Have you seen the misfire code before? Has the BMW been stalling? Hi ***** have a bmw F01 750i and fault code reads 140501 cyl 5 fuel cut off I have fitted new injectors I have changed spark plugs and it will run fine after injectot equalisation and when you start again in the morning it will misfire cyl 5 fault 140501
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