Best procedure to remove S4 MAF?
 

I'm hoping to find out what the best way is to remove the MAF sensor on my '87 S4?
Thanks!

It's very simple. The MAF is held on to the rubber throat on the throttle body by a single jubilee clip.

To access MAF first remove air filter box by taking off intake tubes then undoing the 4 10mm nuts and the jubilee clip securing hose to air divertor valve.

You can loosen the clip either with a long screwdriver aimed through the intake 'legs', or using a 7mm wrench. If you use a wrench it's advisable to tie a long piece of string to it and tie round wrist as you could drop it into vee of the intake!

Once clip is loosened by a turn or so you can pull out the MAF. It's still attached by the 6-way plug going to LH ECU so remove this and the MAF is free.

excellent, thanks for the advice! It looked as though the clip was the only thing holding it in place but I didn't want to gamble and get myself into a 'situation'.

Once air box is removed, Remove Passenger side fuel rail cover. You'll need a foot long Common (flat) screwdriver. You can unscrew the clamp. Only Unscrew enough to loosen the MAF. If you loosen it too much the clamp will slip and you'll have a difficult time reinstalling. Because you'll have to reach in too hold it to tighten again.

Even when you have lossened the clip (only needs a couple of turns) you may find the MAf won't release from the rubber elbow. This is because with the heat in there it can stick to the rubber. A wiggle and a twist can release it.

You may have to lean over the engine to get to the bottom boot clamp...it's a bit of a bugger. If the boot is dry and brittle it should be replaced...they are only about $50.00.