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Bmw e53 auxiliary fan relay.
Cooling fan not working.
The auxiliary fan request comes from the ihka control module via the k bus.
When the relay on the fan itself fails a new fan is needed.
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The fan has 4 different speeds.
Fuse box in passenger compartment bmw e53.
The relay is built into the fan where the wiring is plugged into the fan.
So i am thinking that maybe all that needs to be replaced is the auxiliary fan switch aka temperature sensor part 13 62 1 433 077 which controls the operation of the auxiliary fan.
For the bmw e53 1999 2000 2001 2002 2003 2004 2005 2006 2007 model year.
It is powered by a 50 amp fuse has a constant ground and is signaled by the dme when to come on and how strong to blow.
The auxiliary fan for this vehicle is controlled by the ecm and does not use relays.
Fuse box diagram location and assignment of electrical fuses and relays for bmw x5 e53.
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There is also a relay in the main power box under the passenger cabin air filter that supplies power to the fan.
The auxiliary or a c condenser fan in mounted to the front of the radiator.
You can use a basic multimeter to check for power and ground at the big wires.
It doesn t have a relay.