Mercury Mountaineer Spark Plug Replacement at your home or office.

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

Estimate price near me

Service Location

Customer Ratings

(7)

Included for free with this service

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.

Customer Ratings

(7)

Spark Plug Replacement Service

How much does a Spark Plug Replacement cost?

On average, the cost for a Mercury Mountaineer Spark Plug Replacement is $125 with $30 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2005 Mercury MountaineerV6-4.0LService typeSpark Plug ReplacementEstimate$220.59Shop/Dealer Price$256.99 - $343.69
2010 Mercury MountaineerV8-4.6LService typeSpark Plug ReplacementEstimate$388.83Shop/Dealer Price$466.81 - $669.21
2009 Mercury MountaineerV8-4.6LService typeSpark Plug ReplacementEstimate$388.83Shop/Dealer Price$466.81 - $669.21
2007 Mercury MountaineerV6-4.0LService typeSpark Plug ReplacementEstimate$154.99Shop/Dealer Price$179.99 - $232.48
2001 Mercury MountaineerV6-4.0LService typeSpark Plug ReplacementEstimate$229.09Shop/Dealer Price$268.53 - $357.51
2009 Mercury MountaineerV6-4.0LService typeSpark Plug ReplacementEstimate$154.99Shop/Dealer Price$180.01 - $232.52
2006 Mercury MountaineerV6-4.0LService typeSpark Plug ReplacementEstimate$159.99Shop/Dealer Price$184.87 - $237.28
1998 Mercury MountaineerV6-4.0LService typeSpark Plug ReplacementEstimate$235.59Shop/Dealer Price$275.32 - $364.52
Show example Mercury Mountaineer Spark Plug Replacement prices

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

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercury mechanics

Real customer reviews from Mercury owners like you.

Excellent Rating

(7)

Rating Summary
7
0
0
0
0
7
0
0
0
0

Excellent Rating

(7)

Rating Summary
7
0
0
0
0
7
0
0
0
0
Number of Mercury Mountaineer Spark Plug Replacement services completed
77+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercury MECHANICS
600+
experts on our platform

Recent articles & questions

How Long Do Stabilizer Bar Bushings Last?
A A stabilizer bar is pretty much exactly what it sounds like – a metal bar that helps to stabilize your car. It plays a significant role in handling, particularly around sharp turns. The bar’s job is pretty simple. It...
P2784 OBD-II Trouble Code: Input/Turbine Speed Sensor A/B Correlation
P2784 means a signal from the turbine speed sensor was detected due to electrical issues, faulty sensors or solenoids or bad transmission fluid.
How to Replace an Air Conditioner Receiver Drier
The AC receiver/drier is stores and dries refrigerant. This component should be replaced if too much water enters the system or if leaks are found.

How do I reset the Tire Pressure Monitoring System?

Your truck is equipped with a Tire Pressure Monitoring System. This system lets you know when your tire pressure is getting low. To reset the Tire Pressure Monitoring System. Drive the vehicle over 20 mph for 2 minutes. Park the...

Engine light

You will need to have Check Engine Light (https://www.yourmechanic.com/article/the-check-engine-light-demystified) tested and diagnosed to see what the code is. You may be having a cooling fan issue or some other problem that is causing the light to illuminate and the A/C...

Sputters on start and high idle. Also sputters on acceleration.

Check the spark plugs and wires as they are not working properly. The spark plugs are not burning the fuel or the fuel injectors are leaking. A leaking fuel injector or failed spark plug or wire will cause the engine...

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 (855) 347-2779 · hi@yourmechanic.com