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I noticed that the front radiator fans were not running at all, or were running wide open speed. I ran vag-com on the car and got the below code. I asked the dealer for the cost of the part and labor. Part is $299 (8E0-959-501-AB)for my 02 A4 3.0Q. The dealer said the job would be 4 hours labor. 4 hours?? It's right there at the top of radiator, easy to get to. I decided to do the job myself. It only took me 45 minutes. No stress job too. Here's a little DIY.

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Here's the replacement part.

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You have to cut some wires on the old unit to get it out. These four are the same color code and used to splice to 4 fan wires.

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Here's the old unit removed. You can see the 4 colored wires I had to cut. Cut pretty close to the unit so you have more available for your splice.

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These are the four fan wires that were cut. You can see they are the same color code. They are stripped just enough to receive the crimp.

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Another view

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With the crimps installed

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Here the new unit is installed and bolted in. You have to feed in the left side first, at an angle. There is a metal tab on the unit that slide into a slot on the radiator shroud. Wires ready to be crimped with the others.

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Here the crimp connections have been finished. The wires have been tucked and ziptied out of the way.

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Another view

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Now we just have to snake the main cable to the right side of the engine bay and re-hookup the main plug

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Closeup

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That's it. Use zip ties to tie down cables at the spots where the old zipties were. Start the car with the a/c off. When you turn the a/c on, the fans should kick on. But they should do this in a controlled speed manner. Well, you know how it's supposed to sound.
Replace your engine covers and feel good about saving $400+ in labor charges to the dealership.

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