2006 Subaru Impreza WRX STI Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2006 Subaru Impreza WRX STI
Never overpay. Check prices with our estimator
Verified by mechanics, reported by drivers like you
2006 Subaru Impreza WRX STI ProblemsEngine Misfire Due to Failed Spark Plug Wires
Sometimes the Check Engine Light illuminates because the computer detects misfires. Subaru released an improved spark plug wire set to solve the problem. The ignition coil should also be inspected for carbon tracks or short circuits between the contacts.