2006 Subaru Impreza WRX STI Problems

RepairPal has identified the most common problems with the 2006 Subaru Impreza WRX STI as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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2
Known Problems

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.

The Check Engine Light may illuminate because of a failed knock sensor. Although the sensor often tests okay, it can fail intermittently, while the vehicle is being driven.