A dirty air filter works better than a clean one, so they should be changed on condition assuming you use a top quality one that does not fall apart.
How long that takes depends on how dirty the air and road surface is. About 50K km plus for my 1.9D, but might be 100K driving only on highways in clean mountain air, BUT have a spare ready and take a good look every oil change.
Originally Posted By: HTSS_TR
Originally Posted By: pbm
Originally Posted By: satinsilver
Does anyone think the air filter should be changed right before an oil change?
NO.
I am a believer in automobile maintenance but I don't change my air filter nearly as often as recommended. I check it
often but usually only change it approx. every 30K.
I think Satinsilver means when air filter is needed to be changed, should he changes it just before oil change or at the time he does the oil change.
Personally I changed air filter a week or so before oil change when it is time to change it, which is about 35-40k miles or 4 years.