I have a 2001 A4 1.8 engine, I want to change the air filters myself. I
changed the rectangular air filter once, take a long time to fit the
filter in. Is there another air filter that I need to change as well?
do engine air filters shrink a bit after several years of use? i just
changed mine and i noticed when i took it out that it was a bit smaller
than the replacement filter i was putting in. i called my parts store
to ask them if they had sent me the wrong one and they said no.
the difference between the two was less than half an inch on all sides.
is my replacement filter just slightly too big or did the original
filter shrink or was it undersized?
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