A chassis code is the platform identifier the manufacturer uses internally. F80 is the M3 sedan, F82 the M4 coupe, F83 the M4 convertible - three different codes for cars that many buyers simply call an M4. The code exists because the cars are built on the same platform family, but not to the same sheet metal.
You can derive the chassis code from your VIN, and it is usually shown on the door jamb label or on your registration documents. If you know your generation and body style, you can also read it off the model designation on the car itself.
Generations are not static. A facelift or LCI update can change the front end, the underbody shielding and the sensor layout while keeping the same chassis code. Two cars with the same code and different build years can need different hardware.
The chassis code does not tell us your market specification, or whether your car left the factory with valve control, a tow package or an optional performance brake package. Those change routing and clearance. That is why we ask for the market and the build year alongside the code, and why a VIN is the fastest single answer.
If you would rather check the platform yourself, our Shop by vehicle navigation groups parts the same way we do internally: by platform first, then by body style.
