It's not the ripping software, it's the digital recording function, i.e. the ability to write to disk.
Here's what the court said in the RIAA v Diamond Multimedia case: (internal citations removed)
Unlike digital audio tape machines, for example, whose primary purpose is to make digital audio copied recordings, the primary purpose of a computer is to run various programs and to record the data necessary to run those programs and perform various tasks. The legislative history is consistent with this interpretation of the Act's provisions, stating that "the typical personal computer would not fall within the definition of 'digital audio recording device,'" because a personal computer's "recording function is designed and marketed primarily for the recording of data and computer programs." Another portion of the Senate Report states that "[i]f the 'primary purpose' of the recording function is to make objects other than digital audio copied recordings, then the machine or device is not a 'digital audio recording device,' even if the machine or device is technically capable of making such recordings."
So it really depends on what else the car's ability to write to disk is both primarily used for, and what it is primarily marketed for. The latter is probably worse for them; even if the car happens to be writing map or diagnostic information to disk, probably ripping CDs is what is mainly being advertised.