Repair costs / Spark plug replacement

Spark plug replacement cost: what's fair?

Typical all-in range (parts + labor)

$81–$510

Parts about $24–$70. Labor about $57–$440 (0.6–2 hrs at typical rates).

A spark plug replacement is usually prompted by rough idle, misfires, or a due tune-up. The single biggest driver of an unfair price isn't the labor — it's parts markup. Shops commonly charge well above retail for the part itself, and that's the easiest thing for you to verify and push back on.

Prices by city

Labor rates vary a lot by metro. Pick yours:

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