OuterBanks

Just purchase a non-running 2007 525i N52 at auction. Vin # WBANE53567CW67981

• The belt was disintegrated due to what appears to be a locked up A/C compressor, I was excited about what looked to be an obvious fix.
• The battery was completely shot.
• Replaced battery
• Getting fuel BUT no spark
• No tachometer movement when cranking
• Below is reported from the BlueDriver scan tool.
• 3 Confirmed Trouble Codes:
  • P1890: No clue as to what this code is.
  
  • P0012: "A" Camshaft Position - Timing Over-Retarded Bank 1 - "A" Camshaft Position - Timing Over-
  Retarded Bank 1
  
  • P0700: Transmission Control System (MIL Request) - Transmission Control System (MIL Request)
  
  6 Pending Trouble Codes:
  • P1890: Check report for description. - Check report for description.
  
  • P0012: "A" Camshaft Position - Timing Over-Retarded Bank 1 - "A" Camshaft Position - Timing Over-
  Retarded Bank 1
  
  • P0700: Transmission Control System (MIL Request) - Transmission Control System (MIL Request)
  • P1553: Check report for description. - Check report for description.
  • P1554: Check report for description. - Check report for description.
  • P0341: Camshaft Position Sensor "A" Circuit Range/Performance Bank 1 or Single Sensor - Camshaft
  Position Sensor "A" Circuit Range/Performance Bank 1 or Single Sensor

tstiglich

See https://bmwfault.codes/ for a list of codes. P1890 appears to be voltage related, and may clear with a new battery.

Before you sink too much money into it, I would search the internet regarding the disintegrated belt. Common cause of engine failure. Oil from a leaking oil cooler gasket finds its way onto the belt. Belt gets wrapped up around the crankshaft pulley, then literally gets sucked into the engine.

OuterBanks

You are spot-on in regards to the oil leaking from the oil cooler gasket, it leaks during the cranking without even starting, The belt may have lodged pieces around the A/C pulley shaft.
I tested the cam position sensors last night and one is bad. Also cleaned the vanos solenoids, fingers crossed that a new cam sensor helps the no spark issue.

kd7iwp

My personal guess is the crankshaft position sensor. I know on some of the cars I've had that without a signal from that sensor it won't even start the fuel pump (not that this necessarily happens on the N52, just something I've experienced). It wouldn't surprise me if it doesn't do ignition either until it senses the engine turning.