E46 M3 Aux Fan Not Working

Just one single engine fan responsible for all the cooling down of that engine bay.

E46 m3 aux fan not working.

In addition the aux fan controller mount optional allows you to retain the stock controller to run the fan on auto as an oem style would. If this still fails to turn on the fan i suggest you turn off the engine for now and consider troubleshooting other aspects of the cooling fan electrical system including the low speed fan relay. No aux fan on the m54. If 12v is present then you ve got a bad speed control box on the fan assembly and will need to replace the aux fan.

Go to my website and bmw forum. You can test that the fan is receiving power with a multimeter you ll want to test between the thicker red and brown iirc wires on the aux fan connector. If the fan is not operating check the power connector at the base of the fan and make sure it s seated. I don t have a mechanical fan due to space restrictions of the swap in the e30 engine bay.

The third picture shows what it looked like with the e30 condensor aux fan still installed. The n15 design e46 m3 electric fan mount is a great way to add a 16 spal electric fan because it s so easy to install. I d suggest you sort out your aux fan if you can not sure how the setup is on the m54. I run the pusher fan where the stock aux would be located.

31 03 2015 12 02 am oppositelockmt wrote. I have the spal 16 pusher with an e46 m3 rad. Ever since my accident 4 years ago i ve been running without an aux fan haven t experienced any issues what so ever regarding overheating etc.