I have a 2009 R56, N14 with 98K that I replaced the timing chain and guides (used a kit), vacuum pump, VANOS solenoid, valve cover and walnut blasted the intake valves. The battery is new, the plugs are new, the coils are fairly new. I finally put everything together (it took me several months - I'm near 75 and move slow), and tried starting it, but no joy. No crank; I hear what I think is a solenoid clicking. Headlights and interior lights work and don't dim when I try the starter. The starter worked good prior to me doing the work. The only code I get is P173B. Need help desperately.

 

You posted in the 1st gen section. Might want to repost in 2nd gen.

Maybe this is helpful?

https://www.northamericanmotoring.co...ml#post4559606