I changed mine at 70,000 miles, as one was looking iffy.
Depends again on local conditions. But it's worth removing them and giving
them a vacuum clean - and cleaning out the housing which collects leaves -
etc every six months or so. It's a very easy job. And remove the debris
which collects around the housings.
But IIRC, they're changed every second inspection.
*Why do we say something is out of whack? What is a whack?
Dave Plowman email@example.com London SW
It is certainly possible that the brakes need replacing after 20,000 miles,
but this would mean you drive in very heavy stop-n-go traffic, AND you hit
the brakes very hard very often instead of anticipating that the cars in
front are going to be stopping soon, and then you let of the gas early and
coast up behind them, using the brakes very lightly in the process and
getting much longer wear out of them.
If you really do need front brakes after only 20,000 miles, I suggest you
take another look at youir driving habits and see if you can modify anything
to make your drive more comfortable and increase the service life of stuff
like brakes. You may find that your fuel mileage will improve too. Bonus,
longer brake life and lower gasoline bills.
I can't imagine any reason why you would need new belts at 20,000 miles. The
cabin filters should be changed at about 2 year intervals, but this is a
variable number that depends on the environment. If it is very dusty, then
the filter will need to be replaced more often.
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