No. 5: Replacing thermostat
Average repair cost: $210.81
Up from eighth place last year, this represents 3.7% of repairs.
A car's thermostat regulates the engine's temperature by opening and closing to regulate the flow of coolant. If the coolant isn't changed as recommended, or the car itself is driven in extreme temperatures or in an acidic environment, corrosion can occur, causing it to fail prematurely.
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