I picked up my car last night from the local infiniti dealer after i had 2 air/fuel sensors go bad, which were replaced under warrenty. the service guy said that they noticed i had a K&N filter (drop-in type) and that they were getting many cars in with MAS problems. He said the aftermarkert ones allow more dirt through, causing issues with the MAS, and it would not be covered under warrenty.

Ive never heard such a thing, and think he was BS'n me, but im not a filter expert. anyone have there aftermarket filter cause problems with there MAS, air/fuel sensors?

 

The oil'd filters do let more dirt and oil pass by the MAS. Oil and dirt can build up on your MAS from oil'd filters. Believe it or not a dirty oil'd filter does a better air filtration job than a recently cleaned one. I have switched to the nano fiber filter from Amsoil. Link

 

that is a load of BS. the G has a long history of MAFS problems. THEY HAVE TO WARRANTY EVERYTHING with the drop in filter. they can only void the warranty on the $5 filter that they put in... big woop... tell them that you will sue them if they deny your warranty bc of a better designed filter.. They just don't want to eat the cost and want to cry about it.. Forget them.. the reason they are getting many cars in with MAFS probelms is because the MAFS was poorly designed and that problem is there problem, not yours

 

(refering to OP's post, not binar's post)

 

an over-oiled K & N filter could cause the mass air flow meter to malfunction. All you would really need to do it take it out & clean it. but yes, they can deny warranty coverage IF they can prove the K & N air filter caused the mass air flow meter to go bad.

 

+1....Oiled filters can be a PITA ... if not cleaned and reoiled properly, they'll mess up the MAF sensor resulting in possible loss of warranty.

I used to use K&N, but now after so many issues, I've stopped.

C.

 

amsoil it is! ill make the switch in the next couple of weeks.

 

+1 ^^I stopped using K&N as well. Even though I was cautious re-oiling them, I quit because of others having problems with their sensors. I figured it wasn't worth the hassle and I don't think the oiled drop in filter really made a difference, IMO.

 

So, what do you use now? Is the Amsoil Nano not oiled then? Does replacing the OEM really make any difference?

 

The would have to prove that it was the filter that caused the failure in the sensor to not honor warranty fixes. On a side note, its kind of contradictory that a dealership will try to sell you an CAI kit for $1000 and say it's covered under warranty but at the same time will try to not honor warranty fixes if you installed the filter yourself or one similar to theirs.

North Houston Infiniti sells an Injen CAI for $1000 bucks and says that it's factory approved. Just some argument points for you if you want to rebute your dealers argument.

 

Your warranty is with Nissan North America and dealerships are totally independent businesses, if you **** them off they can suggest you find another dealer for service just as you can buy your car at another dealer.

Legal threats will just force them to suggest you go away. Sugar and niceness almost always works best.

The dealer cannot change, modify, or add to your warranty with Nissan.

 

^+1. I agree with "Q45tech". Do not **** off your dealer. They'll black-flag you in a heart-beat.

 

I use OEM for now......but could be pursuaded to use aftermarket sometime in the future once they become available....
I think you're probably right, tho...... : OEM is about as good as you can do.
Just keep it clean.
C.

 

+1. Arguing with a dealer or 'threatening to sue' is a waste of YOUR time. It's easier to go elsewhere.

 

But the Amsoil is available, part number EAA74. Paper filters do stop dirt, but they also choke up quicker and can not be cleaned an reused. The nanofiblers are the way to go IMO.

Dealer can't bitch about any filter, as long as it meets requirements, and even the K&N does that.