So I decided to change my own engine air filter and in-cabin air filter (last year i paid stillership to do it for me 'lazy') Well I find out today that the passenger side is more dirtier than the driver side. What could it be the reason why its uneven or its supposed to be like that?

Ps. I called Glendale infiniti if they have any idea and of course no fcking idea.

Quick fact: Glendale infiniti charge: $30/each engine air filter and $50 for in-cabin filter, while across the street for Nissan its $21/each and $41.

 

I wouldn't worry about it. maybe check the intake tube (pre-filter) and see its dirty

engine air filter is truely one of the most simple maintenance for DYI, you can't get much simpler than that. maybe putting in gas or checking engine oil level

 

Maybe the raods you drive on are dirtier along the passenger side of the car than they are along the driver side (center) of the road.