Car Problem Reports

Subaru Impreza Improved Spark Plug Wires for Misfire Issues

Subaru Impreza Problem
17 Reports
Me Too

Model Years Affected: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010

Engine Affected: 2.5L 4 Cylinder

Average Mileage: 130,362 mi (82,000 mi - 180,000 mi)


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

  • Visitor, , 2.5L 4 Cylinder, 126,451 mi

    I would experience a loss of power (the whole car running on 1-2 or even 3 cylinders) car would die on the highway while driving so I would have to pull over. Car had a hard time starting and continued to cause horrific misfires until I limped it into the shop. I replaced the wires, coils, and spark plugs; these are all usually changed at the same time.

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  • Visitor, , 2.5L 4 Cylinder, 133,000 mi

    Misfire in cylinder 4 so I changed spark plugs oil around sides and on top

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  • Visitor, , 2.5L 4 Cylinder

    I've had the bucking since day one. I'll have to try to find the improved coil kit, first I've heard of that. Thanks

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  • Visitor, , 2.5L 4 Cylinder

    Engine light on drives fine then when down the gears
    To first gear goes of a cylinder but takes over fine

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