91 525i E34 Cabin Air Filter
Hey, I have a 1991 525i (E34), and I cannot find the cabin air filter! I have taken out pretty much the whole right side of the car in the cabin, and I cannot find it anywere. I saw a photo tutorial of an E34 M5, but there is no little slot next to the 'shark.' To my understanding it should be in between the 'shark' (I guess the AC Control unit) and the AC coils (if it is there, how do I get to it?) If anyone has any thoughts please help me! Thanks AZ
The Microfilter is just behind the A/C evaporator...
You have to take out the glovebox, the plastic trimming above it, the A/C duct that is fixed with screws in the wall behind the glovebox, and finally, between the black plastic cap covering the evaporator and the inner side of the firewall is a white plastic cover fixed by a small torx screw and a turning knob. Remove this white cover and you will find the Microfilter. Just let know if this helped you find it, as I can post more detailed instructions if you need them.
They don't all have the microfilter...
Not sure when they started, but mines a 1990 and doesn't have one. I suspect 91 might have been the year they were introduced, but you'd have to look it up.
Some owners leave it out since the replacement job is
quiet hard to do it yourself. They just keep the interior out of dust... (I think)
The first time I replaced the microfilter
on my car it took about 50 minutes(being careful and studying how it goes together), the second time took less than 15 minutes. It's not actually that hard of a job.