Spark Plug Replacement

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How much does Spark Plug Replacement cost?

It depends on the type of car you drive and the auto repair shop you go to. Our mechanics are mobile, which means they don't have the overhead that repair shops have. They provide you convenience by coming to your home or office.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2012 Volvo XC90 $104 $34.26 $70.00 26% $141.76
2009 Saab 9-7x $355 $180.05 $175.00 20% $448.80
2011 Hyundai Sonata $152 $82.08 $70.00 19% $189.58
2008 Mazda CX-7 $144 $66.64 $77.00 22% $184.89
2009 Jeep Grand Cherokee $248 $73.45 $175.00 27% $342.20
2014 Chevrolet Silverado 1500 $181 $103.84 $77.00 18% $222.09
2014 Chrysler 300 $131 $25.84 $105.00 30% $187.09
2005 Mercedes-Benz S430 $387 $177.46 $210.00 22% $499.96
2013 Lincoln MKZ $182 $41.52 $140.00 29% $256.52
2004 Lexus GX470 $156 $85.84 $70.00 19% $193.34
2014 Infiniti QX70 $384 $230.42 $154.00 17% $466.92
2005 Audi A4 Quattro $139 $69.08 $70.00 21% $176.58
2014 Audi Q7 $585 $290.52 $294.00 21% $742.02
2004 Ford Mustang $268 $114.05 $154.00 23% $350.55
2010 Porsche Cayman $248 $121.76 $126.00 21% $315.26
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Spark Plug Replacement Service

Spark Plug Replacement
Spark Plug Replacement

What are 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

While replacing spark plugs remember

  • 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.

Steps for replacing spark plugs

  • 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.

When to replace spark plugs

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 it to replace the spark plugs?

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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Recent Spark Plug Replacement reviews

Excellent Rating


YourMechanic Spark Plug Replacement Service

Average Rating

4.8/5

Number of Reviews

2,001

Rating Summary
1,872
84
10
7
28
1,872
84
10
7
28

Tomas

9 years of experience
91 reviews
Tomas
9 years of experience
Tomas was prompt and efficient. He diligently worked on my vehicle and finished much sooner than the estimated time.
2015 DODGE GRAND CARAVAN - SPARK PLUGS - NEWARK, NEW JERSEY

Tien

19 years of experience
623 reviews
Tien
19 years of experience
He went above and beyond with his service. I am very happy with the work and his dedication. I really appreciate the time and energy he presented in repairing my car. He came back after a long day of repairing other vehicles to assist me so I wouldn’t have to wait a week. He is a great mechanic and employee
2013 VOLKSWAGEN EOS - SPARK PLUGS - SAN LEANDRO, CALIFORNIA

Jeremiah

9 years of experience
29 reviews
Jeremiah
9 years of experience
Arrived on time, performed the work in a quick and professional manner. Even added photos of the before and after! After cleaning the throttle body he explained that the check engine light came on but will turn off after 100 miles or so, well it turned off after 15 miles. I would recommend Jeremiah to anyone I know and I look forward to him working on my car in the future
2008 HONDA FIT - SPARK PLUGS - HOUSTON, TEXAS

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com