Spark Plug Replacement at your home or office in Mount Prospect.

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Average rating from customers who
received a Spark Plugs Replacement.
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$86.47 - $610.45

Price range for all vehicles


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

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
Jonathan

Jonathan

10 years of experience
92 reviews
Jonathan
10 years of experience
Great job
Jonathan did an excellent job. Got here on time and went right to work. Very capable.
Tien

Tien

20 years of experience
746 reviews
Tien
20 years of experience
Tien was informative, professional, and did a great job!
This is my second appt with Tien and was just as impressed as the first. Professional thorough and goes the extra mile without you asked
Rigoberto

Rigoberto

8 years of experience
517 reviews
Rigoberto
8 years of experience
He was great! I'd ask for him again!
Casey

Casey

21 years of experience
152 reviews
Casey
21 years of experience
Casey changed valve cover gaskets on my 2001 Subaru six cylinder engine. A very time consuming job. He arrived promptly and worked diligently to get the job done. I recommend him for any work that is needed to be done. My job was something I did not want to do myself and Casey performed better than I could have expected. Will use him again if the need arises.
Jamahl

Jamahl

17 years of experience
703 reviews
Jamahl
17 years of experience
Very professional, good communication, awesome service.
Peter

Peter

40 years of experience
1059 reviews
Peter
40 years of experience
Mr. Pryke, for some two years now, continues to be the "most all-around Professional (in his craft) that I have ever experienced".
James

James

27 years of experience
331 reviews
James
27 years of experience
Very knowledgeable and friendly. James really made it personal & helped fix a problem I'd been trying to fix for months. Great job overall!
Omar

Omar

18 years of experience
67 reviews
Omar
18 years of experience
Chris

Chris

19 years of experience
1240 reviews
Chris
19 years of experience
Excellent service overall. Chris was on time well prepared and efficient with time. Extremely helpful and detailed and followed up later with more information. Went above and beyond.
Abdul

Abdul

8 years of experience
279 reviews
Abdul
8 years of experience
He was very helpful.


How much does Spark Plug Replacement cost in Mount Prospect?

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

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2010 Ford Escape $291 $122.86 $167.97 16% $348.61
2004 Volvo S40 $232 $112.15 $119.98 15% $273.40
2009 Hyundai Veracruz $512 $288.20 $223.97 13% $589.20
2012 Audi A5 $168 $87.68 $79.99 14% $195.18
2015 Mercedes-Benz E300 $225 $129.42 $95.98 12% $258.42
2014 Porsche 911 $615 $127.50 $487.93 21% $783.25

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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.

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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