Air filter,primary and secondary

[1stToyota]

Originally Posted by RedRide

This just illustrates the misinformaton out there as Toyota sells an oiled filter. So, how can they not honer a warrenty?
We all know how some dealers tend to not want to honor warrenties and look for excuses.

There has never been a doumented case where an oiled filter caused a MAFS to fail.
The worst case senerio can be where a filter is over oiled. Even then it can be cleaned.
A dirty MAFS does not equel a "failed" MAFS.

A MAF can fail for various reasons and just because an oiled filter is installed, does no mean the filter is at fault.

I didn't name any makes, just remembering something written in a professional auto repair mag--the average Joe will never read it, it's mailed to auto repair shops for free.

Never said MAF sensors were *ruined* with paper or oiled filters installed, said I've seen lots of dirty sensors.