Could be a wiring problem between the dme and the fan.
Bmw x5 auxiliary fan relay.
Backed by over 50 years of car parts experience fix it once and fix it right with four seasons.
New original mini r53 2004 2008 retrofit kit auxiliary.
On all bmw models up through the late 90s the auxiliary or main fan is controlled by one or two thermostatic switches that are mounted into the radiator side or bottom tanks.
2011 bmw x5 xdrive50i.
Identifying and legend fuse box bmw x5 e53 1999 2007.
Now if you are coding for an aux fan relay you either have a bad relay or bad wiring to the relay or outputting from the relay.
Fuse box diagram location and assignment of electrical fuses and relays for bmw x5 e53.
A unlike the older bmw models most models up through 1999 the auxiliary cooling fan on the later models is not just controlled by a coolant temperature.
All products are engineered and tested to provide years of trouble free operation.
12 15 fiat 500 1 4l fuse relay box junction block module unit oem.
This may be on the control side of the relay or the switched side of the relay.
2000 2001 2002 2003 2004 2005 2006.
Locate fuse and relay.
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.
Quick navigation 1999 x5 x6 e53 e70 e71 f15.
This job only applies to e53s built after 10 03.
Radiator fan controller relay by four seasons.
The switches turn on the fan at low speed and then high speed as the coolant temperature rises.