Infiniti Q45 Spark Plug Replacement at your home or office.

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Spark Plug Replacement Estimate for Infiniti Q45

Infiniti Q45 Spark Plug Replacement costs $184 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$105 to $488
Labor: $91 -$472
Parts: $14 -$16
Average Dealer price
$149 to 582
Average Shop price
$126 to 512
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
1990 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$256.84Shop/Dealer Price$346.36 - $431.98
2003 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$119.20Shop/Dealer Price$159.44 - $205.48
1991 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$256.84Shop/Dealer Price$346.50 - $432.21
1997 Infiniti Q45V8-4.1LService typeSpark Plug ReplacementEstimate$119.76Shop/Dealer Price$160.08 - $206.51
1994 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$252.76Shop/Dealer Price$341.32 - $423.93
1995 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$441.76Shop/Dealer Price$598.82 - $732.79
2002 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$119.20Shop/Dealer Price$159.48 - $205.55
1998 Infiniti Q45V8-4.1LService typeSpark Plug ReplacementEstimate$119.76Shop/Dealer Price$160.13 - $206.59
Show example Infiniti Q45 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 Q45 Repair

Average Rating

4.8/5

Number of Reviews

25

Rating Summary
24
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Meet some of our expert Infiniti mechanics

Real customer reviews from Infiniti owners like you.

Tien

19 years of experience
623 reviews
Tien
19 years of experience
Great
2003 INFINITI Q45 - OIL/FLUID LEAK - SAN LORENZO, CALIFORNIA

Vladimir

6 years of experience
199 reviews
Vladimir
6 years of experience
Arrived early, which was good. He was professional and did a solid job; my car works great.
2005 INFINITI G35 - CAMSHAFT POSITION SENSOR - SACRAMENTO, CALIFORNIA

William

14 years of experience
90 reviews
William
14 years of experience
This was a great experience! I highly recommend yourmechanics and William, who was prompt, polite, and efficient. My car battery was replaced in less than an hour at a fair cost.
2011 INFINITI G37 - BATTERY - CHICAGO, ILLINOIS

Brett

6 years of experience
63 reviews
Brett
6 years of experience
Brett did a great job. Due to difficulties beyond his control, he was given the wrong alternator by the parts store, the job was somewhat frustrating and took longer than anticipated but he persisted and got the job done. I am pleased with Bretts performance, with the outcome of the job and with the "Your Mechanic" operation. The arrangements were easy to make, the mechanic was easy to work with and a good mechanic and the price was right. If I need a mechanic I will use Your Mechanic. I am telling my about the positive outcome of using Your Mechanic. Thenks
2001 INFINITI I30 - ALTERNATOR - SAN MARCOS, TEXAS
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
1990 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$256.84Shop/Dealer Price$346.36 - $431.98
2003 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$119.20Shop/Dealer Price$159.44 - $205.48
1991 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$256.84Shop/Dealer Price$346.50 - $432.21
1997 Infiniti Q45V8-4.1LService typeSpark Plug ReplacementEstimate$119.76Shop/Dealer Price$160.08 - $206.51
1994 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$252.76Shop/Dealer Price$341.32 - $423.93
1995 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$441.76Shop/Dealer Price$598.82 - $732.79
2002 Infiniti Q45V8-4.5LService typeSpark Plug ReplacementEstimate$119.20Shop/Dealer Price$159.48 - $205.55
1998 Infiniti Q45V8-4.1LService typeSpark Plug ReplacementEstimate$119.76Shop/Dealer Price$160.13 - $206.59
Show example Infiniti Q45 Spark Plug Replacement prices

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