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.
Resources for the Repair and Maintenance of your 2007 Subaru Impreza WRX STI
2007 Subaru Impreza WRX STI
2007 Subaru Impreza WRX STI 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.
There is a technical service bulletin on the ABS control module. It is replaceable without having to replace the entire anti-lock brake hydraulic unit. Previously, the ABS control module was only available as a complete assembly that included the hydraulic unit.
2007 Subaru Impreza WRX STI Questions and Answers
I was informed by my dealer that there was a internal campaign from Subaru for the authorize change of the oil pickup tube if a car came in with that specific problem. But now they mysteriously can...
2007 Subaru Impreza WRX STI Reviews
This has been the best car. 3000 miles in between oil changes and no oil useage. it rides rough but the sound and the feel of the wheel makes up for that. Insurance is not cheap but i will never buy any but a subaru.