Every 5000 miles an air filter should be changed regularly. You can stretch the life out of an air filter by just blowing some of the dirt out.
It depends on the year.
change the timeing belt every 105000 kms on 1999 passat 6 cylinder 2.8 engine
How often should you change the fuel filter?
Change it according to what VW recommends as listed in your owners manual.
Change the oil filter every time you change the oil.
How often need to change the fuel filter for a 2001 BMW 325i?"
Change the oil filter every time you change the oil.
I change mine every 35K.
The word filter explains it all, alike your house AC filter that you change so often to ensure you stay cool, I recommend that you change your gas filter twice a year.
You should change a furnace filter every 2-4 months.
when it is dirty
You Need To Change Your Air Filter Every Ten Thousands Miles ( 10,000 ). Unless You Drive In A Dusty Area It Is Best To Change More Often.