Infiniti M45 Spark Plug Replacement at your home or office.

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Spark Plug Replacement Estimate for Infiniti M45

Infiniti M45 Spark Plug Replacement costs $111 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$84 to $198
Labor: $70 -$184
Parts: $14
Average Dealer price
$121 to 242
Average Shop price
$101 to 209
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
2006 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$98.20Shop/Dealer Price$130.66 - $170.87
2003 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$189.20Shop/Dealer Price$254.97 - $320.16
2009 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$98.20Shop/Dealer Price$130.70 - $170.94
2010 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$98.20Shop/Dealer Price$130.74 - $171.00
2008 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$98.20Shop/Dealer Price$130.68 - $170.90
2004 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$189.20Shop/Dealer Price$254.67 - $319.64
2007 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$98.20Shop/Dealer Price$130.81 - $171.13
Show example Infiniti M45 Spark Plug Replacement prices

Spark Plug Replacement Service & Cost

What are the Spark Plugs all about?

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.

Spark plugs-MATROX-1

Keep in mind:

  • When the spark plugs are replaced, it is a good idea to inspect the ignition cables as well.
  • Spark plugs come in numerous ratings, and the correct rating for your vehicle should always be used.

How it's done:

  • Scan the car for codes.
  • Clean all surface areas around the spark plugs.
  • Remove spark plugs.
  • Inspect threads in engine head (where plugs are installed).
  • Perform compression test if needed.
  • Inspect ignition wires.
  • Apply anti-seize to the threads of the spark plugs.
  • Install new spark plugs.
  • If needed replace any gaskets removed.

Our recommendation:

During routine maintenance and checkups, your ignition system should always be inspected. Any time that a component of the ignition system is replaced, it’s a good idea to consider replacing the spark plugs as well. If you don’t preemptively change your spark plugs your engine will let you know by misfiring or running poorly, so schedule an inspection as soon as you notice that your engine is not performing properly.

What common symptoms indicate you may need to replace the Spark Plugs?

  • Check Engine light is on.
  • Engine misfires.
  • Poor fuel economy.
  • Vibration coming from the engine.

How important is this service?

Spark plugs are responsible for igniting the fuel that your engine uses to run. When you turn your key, a small voltage of power is sent to the ignition coil, where it is transformed into high voltage currency. This high voltage currency is sent through the ignition cables to the spark plugs. The spark plugs use the power to create a spark, which ignites the fuel, and allows the engine to function.

When the spark plugs malfunction, this spark won’t be created, and the fuel will not be ignited as it should. Your vehicle has many spark plugs, so depending on how many fail, your engine may either run poorly, or not run at all. Continuing to drive a vehicle with malfunctioning spark plugs can also cause damage to the catalytic converter.

Fast and easy Spark Plug Replacement service at your home or office.

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Excellent Rating


Infiniti M45 Repair

Average Rating

4.8/5

Number of Reviews

286

Rating Summary
275
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Meet some of our expert Infiniti mechanics

Real customer reviews from Infiniti owners like you.

Stefan

13 years of experience
320 reviews
Stefan
13 years of experience
Stefan arrived on time and fixed the problem, i was very satisfied with Stefan for performance on the job i'm feel so bad for him that day because was to hot for him to be working under my car and the floor was to hot, overall he dont care about it he just get the job done, thank you Stefan you are the MAN.
2000 INFINITI I30 - ALTERNATOR REPAIR - FAIRFIELD, CA

Kenneth

12 years of experience
112 reviews
Kenneth
12 years of experience
Kenneth was great. on-time and very fast. Good stuff
2003 INFINITI G35 - ALTERNATOR REPAIR - SAN LEANDRO, CA

Michael

21 years of experience
97 reviews
Michael
21 years of experience
Repair done quick. Excellent job on replacing my tire rods
2006 INFINITI M45 - TIE ROD END REPLACEMENT (FRONT LEFT OUTER, FRONT RIGHT OUTER) - ROCK HILL, SC

Torrieanto

8 years of experience
64 reviews
Torrieanto
8 years of experience
Torrieantos is hands down the best mechanic I've had. He is incredibly knowledgeable and professional and will teach you if you ask. A true expert in his trade, Torrieantos can not just explain what he's doing, but he can go into detail as to the automotive theory behind why manufacturers made the engineering decisions they did. Torrieantos is incredibly smart and easy to talk to, and I will be coming back to have him service my car again. Thanks Torrieantos!
2015 INFINITI Q50 - BRAKE ROTOR/DISC REPLACEMENT (FRONT, REAR) - TAMPA, FL
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
2006 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$98.20Shop/Dealer Price$130.66 - $170.87
2003 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$189.20Shop/Dealer Price$254.97 - $320.16
2009 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$98.20Shop/Dealer Price$130.70 - $170.94
2010 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$98.20Shop/Dealer Price$130.74 - $171.00
2008 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$98.20Shop/Dealer Price$130.68 - $170.90
2004 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$189.20Shop/Dealer Price$254.67 - $319.64
2007 Infiniti M45V8-4.5LService typeSpark Plug ReplacementYourMechanic Price$98.20Shop/Dealer Price$130.81 - $171.13
Show example Infiniti M45 Spark Plug Replacement prices

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