Enjoyed BMW (bring my wallet) a couple decades w/several 80's era cars & 1 magical '95 R100RT. the older stuff was simpler & easier to fix - the newer stuff forget about it says my independent mechanic for my '88 535is that I finally unloaded w/200K a few years ago. Owned a few ARC pieces never had any issues but they didn't stay around long. Go Music Reference & be happy & done with it.