What is a BMW chassis code?

A BMW chassis code is BMW's internal identifier for a specific generation of vehicle. For example, the G80 refers to the 6th-generation M3 sedan (2021 onward), and the F80 refers to the 5th-generation M3 sedan (2014-2018). BMW enthusiasts use chassis codes because they are more specific than model years and identify the exact platform underneath the car. Wheel fitment specs (offset, width, hub bore) are determined by the chassis, not the model year, which is why chassis codes are essential when ordering custom wheels.

How do I find my BMW chassis code?

Your BMW chassis code can be found in several places: on the VIN plate inside the driver's door jamb, in your owner's manual, or by entering your VIN into BMW's online VIN decoder. You can also use the chassis lookup tool on this page to identify your platform by model year and trim.

What is the difference between an F80 and a G80 BMW M3?

The F80 is the 5th-generation BMW M3 sedan, produced from 2014 to 2018. It uses a twin-turbocharged S55 inline-six engine. The G80 is the 6th-generation BMW M3 sedan, produced from 2021 onward, and uses the newer S58 engine. They have different wheel fitment specifications, suspension geometry, and brake clearances, which is why each platform has its own dedicated fitment guide.

Does FMB Wheels build custom forged wheels for every BMW platform?

Yes. FMB Wheels builds custom forged monoblock wheels for virtually every BMW platform, including M models, the 3, 4, 5, 7, and 8 Series, and the X5 and X6 SAV/SAC. While we have published fitment guides for the most popular platforms, we accept custom build requests for any BMW chassis. Use the chassis lookup on this page to find your platform and request a guide or a build.