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 Subaru Impreza WRX STI
Subaru Impreza WRX STI Models:
Subaru Impreza WRX STI Problems
Engine Misfire Due to Failed Spark Plug Wires
Engine --
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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.
Subaru Impreza WRX STI Recalls (Recent)
Brake Master Cylinder May Fail
Brakes, November 28, 2011
RepairPal Expert Overview:
The brake master cylinder could malfunction unexpectedly, causing increased brake pedal effort necessary to slow or stop the vehicle. This may result in increased stopping distance, which could lead to a crash. Dealers will inspect the brake master cylinder and replace it as necessary. The Subaru recall number is WVY-35.
Subaru Impreza WRX STI Questions and Answers
wrxsti, 2004 Subaru Impreza WRX STI, Honolulu, HI
all fuses check good under dash and under hood
Visitor, 2004 Subaru Impreza WRX STI, 2.5L 4 Cylinder Turbo, Great Falls, MT
I just recently bought a 2004 suburu impreza wtx sti with around 80k miles on it. Carfax was good, had a mechanic inspect the car upon sale. Just yesterday it started making a really loud fast cli...
winterfourever, 2005 Subaru Impreza WRX STI, 2.5L 4 Cylinder Turbo, Stillwater, MN
About how much would it be to get my engine rebuilt due to a spun bearing? Parts vs. Labor?
Best case scenario vs. worst case scenario?
bonnieclydeone, 2005 Subaru Impreza WRX STI, 2.5L 4 Cylinder Turbo, San Francisco, CA
I like to take off really fast. Is there a down side to high performance clutch? I am a street vehicle, mostly city driving with lots of hills, and I love to accelerate. How do I choose which sort ...
esteban.wong, 2005 Subaru Impreza WRX STI, 2.5L 4 Cylinder Turbo, Sunnyvale, CA
Was told the spark plugs and wires are fine. The cylinder blocks out of alignment; need to be "shaved" or something.
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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.
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