Electric water pump diagnosis buy your parts here.
Bmw 335i radiator fan not working.
If you experience no air blowing no heat in my situation as i did in my 2012 x5 35i 88 000 miles battery almost 7 yrs old on the coldest day of the s.
Check power and ground at the fan connector.
Http go magik ly ml 7uko here i will explain the diag proces.
The fan has a final stage resistor built in so it gets a pwm signal for activation and speed.
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If fan is giving you a hard time and will not drop all the way down check to see if bottom of cooling fan is hung up on radiator.
While there are a variety of reasons your bmw 335i is overheating the most common 3 are a coolant leak water pump radiator hose etc the radiator fan or a failed thermostat.
Bmw 3 series e90 e92 forum e90 e92 e93 3 series powertrain and drivetrain discussions n54 turbo engine drivetrain exhaust modifications 335i radiator fan not working.
The fan will usually store a fault in the dme for activation or ihka system faulted for excess pressure because fan is not coming on.
41 of the time it s coolant leak water pump radiator hose etc.
From below check fan shroud clearance at radiator if needed gently lever fan away from radiator then slide down and lock into place.