Are the VW ones that bad? I understood that, apart from not having a clip, they were identical? Part number 06A906461A.
I did a quick MAF test yesterday and apart from nearly getting nabbed for speeding, was only getting about 110 @ 6k in 3rd (I only did one run). Today I phoned the BMW dealer who looked after the car previously and he confirmed that they hadn't been replaced (and probably not even cleaned) since at least 2003! So MAFs are well overdue.
Now, I know someone who works for VW and I'm sure I can get a much better deal on their ones than the £430 I was quoted today for the BMW one's (Stealer wanted £540!). So really, would it be a false economy? Not trying to rattle cages here, just genuinely interested.