Spark Plug Replacement at your home or office.

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Spark Plug Replacement Estimate for Infiniti QX4

Infiniti QX4 Spark Plug Replacement costs $111 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$73 to $174
Labor: $70 -$160
Parts: $3 -$14
Average Dealer price
$99 to 214
Average Shop price
$87 to 184
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
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CarServiceYourMechanic PriceShop/Dealer Price
1998 Infiniti QX4V6-3.3LService typeSpark Plug ReplacementYourMechanic Price$80.62Shop/Dealer Price$108.68 - $135.70
1999 Infiniti QX4V6-3.3LService typeSpark Plug ReplacementYourMechanic Price$80.42Shop/Dealer Price$108.55 - $135.52
2003 Infiniti QX4V6-3.5LService typeSpark Plug ReplacementYourMechanic Price$154.96Shop/Dealer Price$209.60 - $259.00
2001 Infiniti QX4V6-3.5LService typeSpark Plug ReplacementYourMechanic Price$154.96Shop/Dealer Price$209.68 - $259.13
2000 Infiniti QX4V6-3.3LService typeSpark Plug ReplacementYourMechanic Price$80.62Shop/Dealer Price$108.70 - $135.73
2002 Infiniti QX4V6-3.5LService typeSpark Plug ReplacementYourMechanic Price$155.24Shop/Dealer Price$209.86 - $259.39
1997 Infiniti QX4V6-3.3LService typeSpark Plug ReplacementYourMechanic Price$73.24Shop/Dealer Price$99.61 - $121.20
Show example Infiniti QX4 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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Meet some of our expert Infiniti mechanics

Real customer reviews from Infiniti owners like you.

471 reviews
Peter
38 years of experience
2002 INFINITI QX4 - OIL CHANGE
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341 reviews
Honorio
14 years of experience
I initial booked an appointment to have the starter replaced. I thought "clicking sound" when turning over the car was a sure sign that it was an issue with the starter. However, Honorio insisted checking the battery as the bad battery could cause the starter to make that sound. I was skeptical as the battery was only a year old, but sure enough, it turned out to the battery. I appreciate he took his time to educate me on the a batter, starter, and the electrical system in general. He saved me money from not making unneeded repairs! I would recommend him to anyone and will be booking him for future services. From my previous experience at various shops, a honest, trustworthy, and knowledgable mechanic is hard to find!
2004 INFINITI G35 - OTHER INSPECTIONS
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256 reviews
Jay
32 years of experience
Jay was very patient and professional. Jay took the time for me to understand what was wrong with my recent purchased used SUV that I bought. I will definitely recommend Jay. I called the center once and the representative was too very professional and answered all my questions. My whole experience was beyond all expectations and my experience with YourMechanic leaves as returning customer.
2003 INFINITI QX4 - OXYGEN SENSOR REPLACEMENT (REAR/LOWER/DOWNSTREAM)
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137 reviews
Richard
6 years of experience
Richard was very professional. He came on time and explained everything to me clearly. He appears to very knowledgeable about cars and he was honest. v/r -Angela
2003 INFINITI G35 - CAR IS SHAKING OR VIBRATING INSPECTION
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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
1998 Infiniti QX4V6-3.3LService typeSpark Plug ReplacementYourMechanic Price$80.62Shop/Dealer Price$108.68 - $135.70
1999 Infiniti QX4V6-3.3LService typeSpark Plug ReplacementYourMechanic Price$80.42Shop/Dealer Price$108.55 - $135.52
2003 Infiniti QX4V6-3.5LService typeSpark Plug ReplacementYourMechanic Price$154.96Shop/Dealer Price$209.60 - $259.00
2001 Infiniti QX4V6-3.5LService typeSpark Plug ReplacementYourMechanic Price$154.96Shop/Dealer Price$209.68 - $259.13
2000 Infiniti QX4V6-3.3LService typeSpark Plug ReplacementYourMechanic Price$80.62Shop/Dealer Price$108.70 - $135.73
2002 Infiniti QX4V6-3.5LService typeSpark Plug ReplacementYourMechanic Price$155.24Shop/Dealer Price$209.86 - $259.39
1997 Infiniti QX4V6-3.3LService typeSpark Plug ReplacementYourMechanic Price$73.24Shop/Dealer Price$99.61 - $121.20
Show example Infiniti QX4 Spark Plug Replacement prices

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