No. For the car example, lock-in means you aren't able to use off-brand accessories, or service your car in an unlicensed shop. However, cars are mostly self-contained, so this mostly only comes up with aftermarket stereo systems and membership programs.
And yes, mild lock-in is very common. That doesn't make it a good practice from the consumer's point of view.
I guess car makers practice vendor lock-in too by your definition.
In fact, almost anyone who sells something practices some form of lock-in.