Spark Plug Replacement at your home or office in Plainfield.

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Average rating from customers who
received a Spark Plugs Replacement.
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$86.47 - $611.17

Price range for all vehicles


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Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Average rating from customers who
received a Spark Plugs Replacement.
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Recent Spark Plug Replacement reviews in Plainfield

Excellent Rating


YourMechanic Spark Plug Replacement Service

Average Rating

4.9/5

Number of Reviews

3,267

Rating Summary
3,074
118
15
12
48
3,074
118
15
12
48
Carlos

Carlos

13 years of experience
362 reviews
Carlos
13 years of experience
Carlos knows what he is doing... job well done.
Always punctual. Always professional. Always nice.
Joseph

Joseph

39 years of experience
55 reviews
Joseph
39 years of experience
I didn't give him a full perfect rating only because the problem with my vehicle was beyond his abilities but was very upfront , professional , informational , polite man.
Amor

Amor

40 years of experience
181 reviews
Amor
40 years of experience
Jeffrey

Jeffrey

24 years of experience
683 reviews
Jeffrey
24 years of experience
I wish i could give more. I am sonhapoy with my results. Jeff will be my go to guy forever.
Robert

Robert

17 years of experience
436 reviews
Robert
17 years of experience
He is very good. Top grade better than dealer or others.
Chris

Chris

17 years of experience
309 reviews
Chris
17 years of experience
Very pleased and I highly recommend Chris when you need a mechanic. I expected him to be very good because of all the 5 star reviews but he was even better than that. He really did a perfect job and it only took him half the time that was expected. I will be recommending him to everyone who will listen.
Jonathan

Jonathan

32 years of experience
245 reviews
Jonathan
32 years of experience
Great, very informative
Kenneth

Kenneth

13 years of experience
112 reviews
Kenneth
13 years of experience
He was on time ! He let me no what all was wrong with the car and what needs attention ASAP .. I'll book him every Friday untill my car is at 100 percent with no problems !
Brikk

Brikk

15 years of experience
299 reviews
Brikk
15 years of experience
Brikk is the consummate professional, appearing to be highly skilled at what he does. He was very patient with my inquiries and did not appear to be rushed -- he took all the time that I needed to understand the mechanics of my car. And, as I am a neophyte when it comes to technical data, his patience is even more to be commended. I would definitely trust his judgement when it comes to car repairs.
Kevin

Kevin

30 years of experience
234 reviews
Kevin
30 years of experience
Quick and diligent with a sense of humor.


How much does Spark Plug Replacement cost in Plainfield?

It depends on the type of car you drive and the auto repair shop you go to in Plainfield. Our mechanics in Plainfield 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 in Plainfield.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2010 Nissan Xterra $494 $302.23 $191.97 11% $560.23
2004 Bentley Arnage $235 $114.96 $119.98 14% $276.21
2010 Ford E-250 $322 $178.12 $143.98 13% $371.62
2004 Lexus GS430 $239 $118.88 $119.98 14% $280.13
2008 Cadillac STS $528 $247.57 $279.96 15% $623.82
2014 BMW M5 $292 $155.84 $135.98 13% $338.59

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Spark Plug Replacement Service

What are spark plugs and how do they work?

Spark plugs are one of the key components of your vehicle’s ignition system. They ignite gasoline and air inside of your engine. This gives your engine the power to propel you down the road. The spark plug takes high voltage electricity from the ignition coil and creates a spark at just right moment during the engine’s combustion cycle. This gives the engine the best mix of power, fuel economy and low emissions. However, the electrode at the end of the spark plug eventually wears out and can cause performance issues.

Spark plugs-MATROX-1

When should you replace spark plugs?

Replacement should follow the vehicle maintenance schedule. This will be listed in the vehicle’s owner’s manual. Some cars require regular replacement at 30k, 60k or 100k miles. It is possible in some cases that a spark plug might fail before the service schedule, but it’s not typically common.

Avoiding spark plug replacement can cause:

  • Difficulty starting your car.
  • Check engine light for a misfire code.
  • Flashing check engine light during acceleration for misfire, this can cause engine damage.
  • Reduced fuel economy and/or power.
  • Rough idle and/or unexplained engine vibration.
  • Failed State emission testing.

Even if only one spark plug is found to be faulty, they should always be replaced in sets. Most engines will require 4,6, or 8 spark plugs.

How do mechanics replace spark plugs?

Spark plugs are threaded into the engine’s cylinder head(s). Most cars have one plug per cylinder, so a four-cylinder engine will have four plugs, a six-cylinder engine will have six plugs, and so forth. The mechanic will:

  • Have the correct spark plugs on hand for your vehicle
  • Pull any diagnostic trouble codes that may be related to worn spark plugs.
  • Remove the original spark plugs and look at removed spark plugs for any clues indicating engine mis-operation exists; such as oil burning, excessively rich mixture, pre-ignition damage etc. Inform owner of any found unusual conditions.
  • Install new plugs using a torque wrench.
  • Finally, a road test of the vehicle to confirm normal operation.

Is it safe to drive with worn spark plugs?

Yes, but spark plugs that are worn enough to cause engine-misfiring have the potential to cause engine damage and overheating of the catalytic converter. Regardless of the age of the plugs, or mileage, if the engine misfires or runs poorly, the plugs should be inspected for defects. Generally, spark plug failure will not keep the engine from running, but in cases of extreme wear, you may experience a limitation in the speed at which you can drive the car. If the maintenance schedule says the plugs should be replaced, it is best to do so promptly.

When having spark plugs replaced keep in mind:

  • High-speed driving may accelerate spark plug wear. Consider earlier than required inspection and tune-up if you operate the car in severe conditions.
  • Plugs should always be promptly replaced per the manufacturer maintenance schedule even if they appear to be working perfectly.
  • If your vehicle is equipped with spark plug wires (as opposed to a coil-on-plug system), the wires should be replaced at the same time. This may increase the cost of your repair.
  • It is possible that when doing a spark plug replacement, your vehicle may also need additional parts like ignition coils, this will add to the repair cost.
  • Some engines require that the intake manifold be removed while replacing spark plugs. This may increase the parts and labor cost for the repair.
  • Leaking valve cover gaskets, which have let oil get in contact with the spark plugs, coils or wires, may be the cause of ignition system issues. Valve cover gaskets will need to be replaced in addition to the spark plugs, wires or coils. This will add to the repair cost.

Fast and easy service at your home or office

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Backed by 12-month, 12.000-mile guarantee


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