Infiniti I35 Spark Plug Replacement at your home or office.

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Spark Plug Replacement Estimate for Infiniti I35

Infiniti I35 Spark Plug Replacement costs $204 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$203 to $230
Labor: $189 -$216
Parts: $14
Average Dealer price
$280
Average Shop price
$243
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Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
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CarServiceEstimateShop/Dealer Price
2003 Infiniti I35V6-3.5LService typeSpark Plug ReplacementEstimate$217.20Shop/Dealer Price$292.86 - $365.46
2002 Infiniti I35V6-3.5LService typeSpark Plug ReplacementEstimate$217.20Shop/Dealer Price$293.18 - $366.03
2004 Infiniti I35V6-3.5LService typeSpark Plug ReplacementEstimate$217.20Shop/Dealer Price$292.97 - $365.66
Show example Infiniti I35 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 I35 Repair

Average Rating

4.9/5

Number of Reviews

46

Rating Summary
42
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1
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42
3
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Meet some of our expert Infiniti mechanics

Real customer reviews from Infiniti owners like you.

Ben

37 years of experience
698 reviews
Ben
37 years of experience
Ben is the best. There is no reason to do things the old fashioned way and bring it to a crooked dealer when Yourmechanic and excellent technicians like Ben will take care of you and your cars faster and with better work. I don't have to mention the outrageous costs the dealer expects out of you, so play it safe and just call Yourmechanic.
2002 INFINITI I35 - WINDOW MOTOR / REGULATOR ASSEMBLY REPLACEMENT (DRIVER SIDE FRONT) - HUMBLE, TEXAS

James

26 years of experience
151 reviews
James
26 years of experience
Prompt and observant! Very professional and personable with tips for my vehicle!
2004 INFINITI I35 - 150,000 MILES MAINTENANCE SERVICE - ALTAMONTE SPRINGS, FLORIDA

Fred

13 years of experience
130 reviews
Fred
13 years of experience
Fred showed up early, which was great. He explained exactly what he was going to do very clearly and in plain language. He wrapped up everything in far less time than I expected and we took a close look at the old damaged constant velocity boot. It was in bad shape. I am a lot happier with the way the car drives now. Based upon this experience I would highly recommend his skills to others.
2002 INFINITI I35 - AXLE / CV SHAFT ASSEMBLY REPLACEMENT (PASSENGER SIDE FRONT) - HUMBLE, TEXAS

David

21 years of experience
72 reviews
David
21 years of experience
Very professional he knows his job......Great job very happy.
2004 INFINITI I35 - ALTERNATOR - OCALA, FLORIDA
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
CarServiceEstimateShop/Dealer Price
2003 Infiniti I35V6-3.5LService typeSpark Plug ReplacementEstimate$217.20Shop/Dealer Price$292.86 - $365.46
2002 Infiniti I35V6-3.5LService typeSpark Plug ReplacementEstimate$217.20Shop/Dealer Price$293.18 - $366.03
2004 Infiniti I35V6-3.5LService typeSpark Plug ReplacementEstimate$217.20Shop/Dealer Price$292.97 - $365.66
Show example Infiniti I35 Spark Plug Replacement prices

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