Firstly, there's a very good chance driving without a speedometer is illegal in your area. Secondly, anything that affects functional safety should itself be v

Firstly, there's a very good chance driving without a speedometer is illegal in your area. Secondly, anything that affects functional safety should itself be vetted fron a FuSa perspective. I guarantee you that most manufacturers treat the instrument cluster as a Functional Safety item. If CarPlay can't bring the system to a state where that analysis is affected (which seems unlikely here), there's no issue. That said, I'd probably use it.