Spark Plug Replacement Estimate for Infiniti M45

Infiniti M45 Spark Plug Replacement costs $109 on average. Following is a breakdown of the labor and parts estimates.

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YourMechanic Price
$83 to $197
Labor: $70 -$184
Parts: $13
Average Dealer price
$118 to 239
Average Shop price
$99 to 207
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CarServiceYourMechanic PriceShop/Dealer Price
2003 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$174.60Shop/Dealer Price$236.44 - $290.47
2009 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$83.35Shop/Dealer Price$112.21 - $141.37
2007 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$83.35Shop/Dealer Price$112.14 - $141.24
2006 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$83.35Shop/Dealer Price$112.17 - $141.30
2010 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$83.60Shop/Dealer Price$112.43 - $141.70
2008 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$83.60Shop/Dealer Price$112.40 - $141.65
2004 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$174.66Shop/Dealer Price$236.87 - $291.21
Show example Infiniti M45 Spark Plug Replacement prices
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Parts required for a Infiniti M45 Spark Plug Replacement

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All about Spark Plug Replacement

The spark plugs are an important part of the ignition system. When you turn the ignition key (car's key) on, it causes the ignition coil to generate the spark which ignites the air-fuel mixture in the engine cylinders to start the engine. The number of spark plugs in the car is the same as the number of cylinders, although some vehicle manufacturers will use two spark plugs per cylinder. Over time, the spark plugs wear out and require replacement. When the spark plugs wear out, it is harder for it the air-fuel mixture to ignite, resulting in engine misfires. If one of the spark plugs has failed, the car will still start and run, but it will run poorly. On some vehicles, spark plug replacement may be labor intensive and involve removal of the intake plenum.

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