Spark Plug Replacement at your home or office in Llano.

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Service Area

Average rating from customers who
received a Spark Plugs Replacement.
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$96.47 - $642.49

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 Llano

Excellent Rating


YourMechanic Spark Plug Replacement Service

Average Rating

4.9/5

Number of Reviews

3,573

Rating Summary
3,362
127
16
15
53
3,362
127
16
15
53

Chris

20 years of experience
1612 reviews
Chris
20 years of experience
A True professional and very knowledgeable
Chriss was an exceptional guy, professional, and informative. He allowed me to sit and watch, but i had things going on. He gave me some good advice.

Luis

16 years of experience
183 reviews
Luis
16 years of experience
Very convenient

Joshua

25 years of experience
709 reviews
Joshua
25 years of experience
Joshuas replaced Timing Belt, Water pump and Spark Plugs for my 2007 Honda Odyssey. He is highly experienced and knowledgeable. He came on time and completed the work in 4 1/2 hours in highly professional manner. I was watching him throughout and noticed that he is very methodical. Whenever I ask any question he explained in great detail all my questions with great patience. He even replaced my wipers which I bought from Costco free of charge. I really like his work and would recommend him to others also.

Jamahl

18 years of experience
827 reviews
Jamahl
18 years of experience
Good mechanic 

Jeffrey

25 years of experience
839 reviews
Jeffrey
25 years of experience
Second time using Jeff, never seems to fail me. Best I seen thus far!!!

Michael

14 years of experience
501 reviews
Michael
14 years of experience
Arrived on time and was very knowledgeable. Explained which followup services he would recommend and the reasons why based on what he saw. Would recommend

Chris

9 years of experience
82 reviews
Chris
9 years of experience
Chris was very knowledgeable and friendly. He did a great job and I will definitely book him again!

Christopher

25 years of experience
258 reviews
Christopher
25 years of experience
Great mechanic

Sameh

21 years of experience
2 reviews
Sameh
21 years of experience
The mechanic was on time very professional knows what he was doing and I am going to reschedule for him in two weeks he is real mechanic I thank him for coming thank you all

Michael

38 years of experience
131 reviews
Michael
38 years of experience
Great work done


How much does Spark Plug Replacement cost in Llano?

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

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2006 GMC Sierra 2500 HD $524 $363.52 $159.98 9% $578.52
2009 Ford Escape $135 $54.64 $79.99 16% $162.14
2008 Volkswagen Jetta $196 $116.25 $79.99 12% $223.75
2010 Cadillac Escalade ESV $353 $208.67 $143.98 12% $402.17
2010 Mercedes-Benz SL600 $475 $258.84 $215.97 13% $549.09
2011 Porsche Cayman $331 $187.43 $143.98 12% $380.93

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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.

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