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The spark plug socket size for a Mazda3 is typically 9/16 inches, which is the standard size used by Mazda for most of its vehicles. It's recommended to replace the spark plugs for this car every 60,000 to 80,000 miles, indicated by a maintenance required light on your dashboard. The cost of a single new spark plug ranges from $5 to $10, while a full set is priced between $15 and $25. If you prefer to have a professional change them at a shop, expect to pay between $140 and $220.
The Mazda 3 requires a spark plug socket size of 9/16 inches.
I own a Mazda 3, but the plug on it is stuck and won't open.