I'm relatively new to car maintenance and am not sure how to tell if my air filter or o2 sensor needs replacing. Typically if the air filter is dirty I would replace it, but this is a k&n and is red, so I'm not sure what I'm looking for.
http://imgur.com/PaZmXGr
http://imgur.com/Bs7bOAM
http://imgur.com/44jqKZI
http://imgur.com/gDoYiSH
any input on the state of mine or what i should look for in the future is very appreciated,
thanks!
http://imgur.com/PaZmXGr
http://imgur.com/Bs7bOAM
http://imgur.com/44jqKZI
http://imgur.com/gDoYiSH
any input on the state of mine or what i should look for in the future is very appreciated,
thanks!