But in MOST modern cars cars you will not replace, as in my example, an electronic steering column lock with an aftermarket one, you would also have change the keyfob reader, trip computer and ECU (at least in my car). The same way that if you install a properly pre-programmed touch id scanner the phone will work just fine.
My point is that I don't understand why all the hate for the phone to lock when a device that is protecting your data is bypassed. Sure, they are being assholes for not providing a way to unlock the phone, even if it would erase all your data in the process, but it's Apple, they make very cool stuff and are known for locking their stuff up as tightly as possible, that's why it isn't for me. If they decided to lock every component, including LCD, digitizer, speakers, back covers, batteries (they could easily do it), I would agree, but it's probably a critical security component, and after that iCloud shenanigans they are probably a bit paranoid.
I'm not discussing the merits of their HW implementation, and I concede that locking stuff up after the replacements worked fine for several weeks is just wrong, but it's Apple, why the surprise? Consumers have a choice between shiny and locked or a bit less shiny and open, take your pick and don't be surprised if your brand new iPhone comes with proprietary connectors and can't be repaired or if your 50USD smartphone doesn't come with iOS. If you bought a 900USD phone and can't spare 150USD for a repair after the 2 year warranty is over you probably should have bought a cheaper phone in the first place.