auto

Top 10 check-engine-light car repairs

No. 5 car repair: Bad spark plug wires and spark plugs

Average repair cost: $342.55

Replacing a spark plug can cost $10 if you do it yourself, but drivers spend much more to have spark plugs and wires replaced by a technician. The cost increased by 8.8 percent over the previous year.

When these items fail, they can cause the engine to misfire and your fuel economy to suffer. What's more, ignoring the problem can result in permanent damage to your car's catalytic converter, which costs more than $1,000 to repair.

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