What's the best air filter to use? - Toyota Yaris Forums

echaru · 12-05-2010, 06:11 PM

I have no scientific proof that shows if K&N hurt MAF or not, but I can tell you my experience with K&N filter.

I had Toyota Echo 2000 that I bought in 2005. I put K&N filter in a month after I bought the car. In 2008, the engine light came on. It took forever for me to find out what the heck was wrong with the car. I did a bunch of maintenanace while I was at it. I changed spark plug, oil filter, fuel filter, serpentine belt, battery, front and rear breaks. Engine light still on.

The last thing I did, before I gave up,was replacing the expensive MAF with a new one. The engine light disappeared. After that I changed the K&N filter with the normal stock paper filter. I drove the car for 2 more years, no check engine light. Then I traded the Echo in for the Yaris, 2 months ago.

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12-05-2010, 06:11 PM	#6
echaru PsychMobile Drives: '10 Yaris 5Dr Blazing Blue Join Date: Oct 2010 Location: Ohioan Posts: 60	I have no scientific proof that shows if K&N hurt MAF or not, but I can tell you my experience with K&N filter. I had Toyota Echo 2000 that I bought in 2005. I put K&N filter in a month after I bought the car. In 2008, the engine light came on. It took forever for me to find out what the heck was wrong with the car. I did a bunch of maintenanace while I was at it. I changed spark plug, oil filter, fuel filter, serpentine belt, battery, front and rear breaks. Engine light still on. The last thing I did, before I gave up,was replacing the expensive MAF with a new one. The engine light disappeared. After that I changed the K&N filter with the normal stock paper filter. I drove the car for 2 more years, no check engine light. Then I traded the Echo in for the Yaris, 2 months ago.