Spark Plug Replacement at your home or office in Great Falls.

Our mobile technicians offer services 7 days a week. Upfront and transparent pricing.

Get an upfront price

Service Area

Average rating from customers who
received a Spark Plugs Replacement.
Learn More

$96.47 - $648.09

Price range for all vehicles


YourMechanic Benefits

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

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.
Learn More



Recent Spark Plug Replacement reviews in Great Falls

Excellent Rating


YourMechanic Spark Plug Replacement Service

Average Rating

4.9/5

Number of Reviews

3,498

Rating Summary
3,290
125
16
15
52
3,290
125
16
15
52

Chris

20 years of experience
1568 reviews
Chris
20 years of experience
Arrived reasonably early and clearly explained the process.
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.

Brad

21 years of experience
20 reviews
Brad
21 years of experience
Brad, did an excellent Job, he explained everything he was so curious and very friendly..I will recommend Brad, to all my friends and I will ask for him again Thanks for sending him so a very big Thanks once again..

Abdul

9 years of experience
395 reviews
Abdul
9 years of experience
Great Guy fast worker and Honest. He changed all my spark plugs and realized he was short to plugs from parts dept. He told me and then went to a local parts store to get more plugs. He also made sure he had the same brand. My BMW is running great.

Kevin

22 years of experience
231 reviews
Kevin
22 years of experience
Great technician

Wesley

14 years of experience
277 reviews
Wesley
14 years of experience
Wesley did a terrific job and was very informative. He helped me out tremendously and I am very grateful for his ability to do the job in a timely fashion so I was able to make it work later that day. Thank you so much.

Carlos

15 years of experience
225 reviews
Carlos
15 years of experience
Very quick friendly service

Richard

19 years of experience
461 reviews
Richard
19 years of experience
Efficient and to the point.

David

6 years of experience
36 reviews
David
6 years of experience
Great experience. David was knowledgeable, on time, and got the job done!

Christopher

23 years of experience
79 reviews
Christopher
23 years of experience
Great guy easy to talk to and figure out the issue. I already am making a list of other things I need done. Will be using again soon.

Matthew

31 years of experience
598 reviews
Matthew
31 years of experience
Very knowledgeable of the situation and assisted the problem very well.


How much does Spark Plug Replacement cost in Great Falls?

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

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2007 Pontiac Solstice $138 $57.52 $79.99 16% $165.02
2011 GMC Yukon $275 $130.91 $143.98 15% $324.41
2012 Chevrolet Sonic $138 $57.52 $79.99 16% $165.02
2011 Acura TL $262 $149.52 $111.98 12% $300.02
2008 Mercedes-Benz GL450 $440 $263.62 $175.97 12% $500.12
2009 Lexus IS F $534 $390.47 $143.98 8% $583.97

Fast and easy service at your home or office

GET A QUOTE FOR YOUR CAR

Backed by 12-month, 12.000-mile guarantee


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

GET A QUOTE FOR YOUR CAR

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