20 Most Recent 2005 Mazda 3 - Page 8 Questions & Answers

Nrmaly emision related (o2 sensor, air flow sensr etc...) a scan of the computer should give you a code to help us out.

check the engine light problem ......trans speed sensor ?

You must remove the upper part of the intake manifold and thenthe coils over each plug

Or you could find a local mechanic that doesn't charge an arm and leg and get it replaced for about $500. Please rate my answer so I get points for it.