Why is my BMW 528i Sedan (F10) overheating or losing coolant? This BMW 528i guide is based on 2 documented technical cases, including 1 confirmed successful repair outcome. It explains the symptoms, diagnostic findings and repairs supported by the captured research without assuming that the same part is responsible for every vehicle. The documented applicability includes 2013. Captured platform information includes 5 Series F10 Sedan. Captured engine information includes N20.
What Drivers or Technicians Reported
Documented complaint language included: Intermittent overheating; radiator fan does not operate.; Vehicle does not reach operating temperature and has 138701..
Fault Codes Seen in Supporting Cases
Codes included 1A2002, 1A2664, 138701. A fault code is evidence of what the control system detected, not automatic proof that a particular component failed.
Causes Confirmed in Documented Cases
Confirmed root causes included: Open red supply circuit from fuse 73 to electric-fan cutoff-relay pin 3..
What the Diagnostic Process Found
Ground pin 2, B+ pin 1, no power pin 3 Fan operated B+ present; fuse intact Diagnostic Procedures Used Check relay pins Jump relay pins 1 and 5 Check 60A fuse 73
Repairs That Corrected Documented Cases
Confirmed repairs included: Repair open fuse-73-to-relay-pin-3 supply circuit.
BMW 528i Diagnosis in Hickory, NC
Mich's Foreign Cars has served Hickory and the surrounding Western North Carolina area since 1983. We specialize in European and foreign vehicles and use professional diagnostic equipment to identify the cause before recommending repairs. If your BMW 528i is showing this symptom or fault pattern, call Mich's Foreign Cars at 828-324-6012 to schedule diagnosis.