[Arizhel]

Yeah, it's called the Magnusson-Moss Warranty Act of 1975. It doesn't just apply to cars though, it applies to everything, including farm equipment.

[syshum]

That was one, but not the only Regulation passed as a result

Things like ODBII Regulations, which do only Apply to Highyway Vehicles, and all of the regulations that come out of the USDOT for Highway rated Vehicles.