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Spark Plug Replacement Service & Cost by Ergys Jancaj

Spark plugs-MATROX-1
Spark plugs-MATROX-1

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.

Car Labor Cost Parts Cost Dealer Price YourMechanic Savings
2003 Infiniti QX4 $215.00 $11.15 $191.15 - $261.15 $160 29%
2006 BMW 760Li $376.25 $18.84 $333.84 - $456.34 $276 30%
2009 Mercedes-Benz CLK350 $150.50 $22.15 $148.15 - $197.15 $120 30%
1999 Saturn SL $107.50 $3.22 $93.22 - $128.22 $78 29%
1995 Chevrolet Tahoe $150.50 $4.13 $130.13 - $179.13 $109 29%
1997 Toyota Celica $107.50 $9.20 $99.20 - $134.20 $84 28%
2003 Chevrolet Trailblazer $215.00 $10.37 $190.37 - $260.37 $160 29%
2006 Infiniti M45 $107.50 $11.15 $101.15 - $136.15 $85 28%
2009 BMW 550i $193.50 $29.06 $191.06 - $254.06 $155 30%
2006 Infiniti FX35 $204.25 $11.15 $182.15 - $248.65 $153 29%

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.

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.

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.

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