BMW Z3 2.0 – 2.8 ECU (Engine Management) – Part No: 7500255 / 5WK9037
Common Faults:

• AA Ecu/ electric throttle error of plausibility or 170 Ecu/ electric throttle error of plausibility.
• 64 ECU microprocessor functional disorder or 100 ECU microprocessor functional disorder.
• A9 ECU- output stage motor throttle – emergency cutout or 169 ECU- output stage motor throttle – emergency cutout.
• No input signal on the throttle.
• Faulty ignition driver.
• No communication possible with the ecu.
• No ECU function.
• Other fault on request.

Part Numbers:

• BMW Part Number – 7500255
• Bosch Part Number – 5WK9037