The aux fan is controlled by the engine computer, and is only turned on when needed. It can operate for just coolant cooling and/or for ac, but only when the DME see's it needed. If your aux fan never comes on it is probably bad, but it is hard to confirm without BMW GT1 diagnosis. If after a long drive when the vehicle is at full operating temperature with the ac on max it doesn't come on after sitting at idle a minute or two I'd think it may be bad...

__________________
"When you do things right, people won't be sure you've done anything at all" (Bender, futurama)

You make something idiotproof, they'll make a better idiot

You think professional is expensive, just wait until you pay for amateur.

Never let your sense of morals prevent you from doing what is right.

Examine what is said, not who speaks.

X5 pics

RIP 4.6is.....

2003 4.6is