Spark Plug Replacement at your home or office.

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Spark Plug Replacement Estimate for Jeep J20

Jeep J20 Spark Plug Replacement costs $73 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$73 to $83
Labor: $70 -$80
Parts: $3
Average Dealer price
$99
Average Shop price
$87
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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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CarServiceYourMechanic PriceShop/Dealer Price
1986 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.22Shop/Dealer Price$88.55 - $101.85
1977 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.18Shop/Dealer Price$88.57 - $101.90
1984 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.16Shop/Dealer Price$88.50 - $101.78
1974 Jeep J20L6-4.2LService typeSpark Plug ReplacementYourMechanic Price$72.91Shop/Dealer Price$88.20 - $101.30
1982 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.22Shop/Dealer Price$88.56 - $101.87
1978 Jeep J20V8-6.6LService typeSpark Plug ReplacementYourMechanic Price$72.96Shop/Dealer Price$88.22 - $101.33
1978 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.26Shop/Dealer Price$88.68 - $102.08
1983 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.16Shop/Dealer Price$88.54 - $101.85
Show example Jeep J20 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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Peter
38 years of experience
Honestly
2006 JEEP LIBERTY - SPARK PLUG REPLACEMENT
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331 reviews
Jamahl
15 years of experience
He was the absolute best. This was my first experience with YourMechanic, and it was fantastic. He was punctual, professional, courteous and very helpful. I will definitely be back for more; you guys have earned my future business. I'll try to spread the word. Thanks
2003 JEEP LIBERTY - SPARK PLUG REPLACEMENT
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218 reviews
Brandon
13 years of experience
Brandon did a great job and was very professional! He communicated well and throughout the entire process. He was clearly knowledgeable and experienced and wanting to help. I would highly recommend him!
1992 JEEP WRANGLER - TIRE ROTATION
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4 reviews
Jonathan
10 years of experience
Jonathan had a difficult time with my Jeep Grand Cherokee water pump replacement. It took much longer than anticipated and once the pump was removed he discovered a rotted tube which also needed to be replaced. In addition, because I'd had to leave and absent-mindedly took the key with me, he was unable to test the repair adequately once complete which meant he had to come back later to complete the repair. Through it all, Jonathan maintained a professional attitude and demonstrated a dedication to getting the job done right and to my satisfaction. I waited a couple of weeks to enter this review to ensure that the repair 'stuck' and it has. So even though the job took longer and cost more (due to the rotted tube) I have to say that I am very satisfied with Jonathon and my experience with YourMechanic.com. Thanks!
1996 JEEP GRAND CHEROKEE - WATER PUMP REPLACEMENT
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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
1986 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.22Shop/Dealer Price$88.55 - $101.85
1977 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.18Shop/Dealer Price$88.57 - $101.90
1984 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.16Shop/Dealer Price$88.50 - $101.78
1974 Jeep J20L6-4.2LService typeSpark Plug ReplacementYourMechanic Price$72.91Shop/Dealer Price$88.20 - $101.30
1982 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.22Shop/Dealer Price$88.56 - $101.87
1978 Jeep J20V8-6.6LService typeSpark Plug ReplacementYourMechanic Price$72.96Shop/Dealer Price$88.22 - $101.33
1978 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.26Shop/Dealer Price$88.68 - $102.08
1983 Jeep J20V8-5.9LService typeSpark Plug ReplacementYourMechanic Price$73.16Shop/Dealer Price$88.54 - $101.85
Show example Jeep J20 Spark Plug Replacement prices

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