Mercury Marquis Spark Plug Replacement at your home or office.

Our certified mechanics come to you・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Logo-yelp
CUSTOMERS LOVE US ON YELP
4.5 out of 5 (550 reviews)
Icon-warranty_badge-02
SERVICES BACKED BY OUR
12-Month, 12,000-Mile Warranty
How does YourMechanic work?    
Icon-quote-hiw
Get a quote

Choose from 600+ repair, maintenance, and diagnostic services, backed by our 12-month, 12,000-mile warranty.

Icon-calendar-hiw
Book an appointment

Tell us when to meet you at your home or office. We’ll send one of our vetted, top-rated mechanics.

Icon-fixed-hiw
Get your car fixed

Continue with your day while our mechanic fixes your car onsite. You pay only after the job is done.

Spark Plug Replacement Estimate for Mercury Marquis

Mercury Marquis Spark Plug Replacement costs $75 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$73 to $86
Labor: $70 -$80
Parts: $3 -$6
Average Dealer price
$99 to 106
Average Shop price
$87 to 91
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceEstimateShop/Dealer Price
1973 Mercury MarquisV8-7.5LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.32 - $112.69
1983 Mercury MarquisL4-2.3LService typeSpark Plug ReplacementEstimate$75.96Shop/Dealer Price$92.04 - $107.45
1978 Mercury MarquisV8-7.5LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.34 - $112.73
1986 Mercury MarquisL4-2.3LService typeSpark Plug ReplacementEstimate$75.96Shop/Dealer Price$92.01 - $107.41
1978 Mercury MarquisV8-5.8LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.33 - $112.71
1975 Mercury MarquisV8-6.6LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.32 - $112.68
1967 Mercury MarquisV8-6.4LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.41 - $112.84
1970 Mercury MarquisV8-5.8LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.39 - $112.80
Show example Mercury Marquis Spark Plug Replacement prices

Spark Plug Replacement Service & Cost

What are the Spark Plugs all about?

The spark plugs are an important part of the ignition system. When you turn the ignition key (car's key) on, it causes the ignition coil to generate the spark which ignites the air-fuel mixture in the engine cylinders to start the engine. The number of spark plugs in the car is the same as the number of cylinders, although some vehicle manufacturers will use two spark plugs per cylinder.

Over time, the spark plugs wear out and require replacement. When the spark plugs wear out, it is harder for it the air-fuel mixture to ignite, resulting in engine misfires. If one of the spark plugs has failed, the car will still start and run, but it will run poorly. On some vehicles, spark plug replacement may be labor intensive and involve removal of the intake plenum.

Spark plugs-MATROX-1

Keep in mind:

  • When the spark plugs are replaced, it is a good idea to inspect the ignition cables as well.
  • Spark plugs come in numerous ratings, and the correct rating for your vehicle should always be used.

How it's done:

  • Scan the car for codes.
  • Clean all surface areas around the spark plugs.
  • Remove spark plugs.
  • Inspect threads in engine head (where plugs are installed).
  • Perform compression test if needed.
  • Inspect ignition wires.
  • Apply anti-seize to the threads of the spark plugs.
  • Install new spark plugs.
  • If needed replace any gaskets removed.

Our recommendation:

During routine maintenance and checkups, your ignition system should always be inspected. Any time that a component of the ignition system is replaced, it’s a good idea to consider replacing the spark plugs as well. If you don’t preemptively change your spark plugs your engine will let you know by misfiring or running poorly, so schedule an inspection as soon as you notice that your engine is not performing properly.

What common symptoms indicate you may need to replace the Spark Plugs?

  • Check Engine light is on.
  • Engine misfires.
  • Poor fuel economy.
  • Vibration coming from the engine.

How important is this service?

Spark plugs are responsible for igniting the fuel that your engine uses to run. When you turn your key, a small voltage of power is sent to the ignition coil, where it is transformed into high voltage currency. This high voltage currency is sent through the ignition cables to the spark plugs. The spark plugs use the power to create a spark, which ignites the fuel, and allows the engine to function.

When the spark plugs malfunction, this spark won’t be created, and the fuel will not be ignited as it should. Your vehicle has many spark plugs, so depending on how many fail, your engine may either run poorly, or not run at all. Continuing to drive a vehicle with malfunctioning spark plugs can also cause damage to the catalytic converter.

Fast and easy Spark Plug Replacement service at your home or office.

GET A QUOTE FOR YOUR CAR
Backed by 12-month, 12,000-mile guarantee

Excellent Rating


Mercury Repair

Average Rating

4.7/5

Number of Reviews

585

Rating Summary
542
26
2
3
12
542
26
2
3
12

Meet some of our expert Mercury mechanics

Real customer reviews from Mercury owners like you.

Jamahl

16 years of experience
555 reviews
Jamahl
16 years of experience
Jamahl is very respectful and very knowledgeable. He is easy to talk to. He actually listens and responds appropriately. Thanks again Jamahl.
1997 MERCURY GRAND MARQUIS - COOLANT TEMPERATURE SENSOR - ORLANDO, FLORIDA

Noe

32 years of experience
468 reviews
Noe
32 years of experience
Noe is a good mechanic. He worked on my 1985 Mercury Grand Marquis. He is knowledgeable and competent. He answered my questions and offered good advise on my car's maintenance. He allowed me to observe him servicing my car. He was friendly and polite. I will use his services again in the future! A+
1985 MERCURY GRAND MARQUIS - DISTRIBUTOR ROTOR AND CAP - SEATTLE, WASHINGTON

Danny

7 years of experience
223 reviews
Danny
7 years of experience
Great guy did a great job very professional will definitely book danny again 5 star servic
2006 MERCURY MILAN - AXLE / CV SHAFT ASSEMBLY REPLACEMENT (DRIVER SIDE FRONT) - PHILADELPHIA, PENNSYLVANIA

Gary

31 years of experience
91 reviews
Gary
31 years of experience
Gary was awesome! He was early, knowledgeable and polite.
2004 MERCURY MOUNTAINEER - BATTERY TERMINAL ENDS - MARIETTA, GEORGIA
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceEstimateShop/Dealer Price
1973 Mercury MarquisV8-7.5LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.32 - $112.69
1983 Mercury MarquisL4-2.3LService typeSpark Plug ReplacementEstimate$75.96Shop/Dealer Price$92.04 - $107.45
1978 Mercury MarquisV8-7.5LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.34 - $112.73
1986 Mercury MarquisL4-2.3LService typeSpark Plug ReplacementEstimate$75.96Shop/Dealer Price$92.01 - $107.41
1978 Mercury MarquisV8-5.8LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.33 - $112.71
1975 Mercury MarquisV8-6.6LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.32 - $112.68
1967 Mercury MarquisV8-6.4LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.41 - $112.84
1970 Mercury MarquisV8-5.8LService typeSpark Plug ReplacementEstimate$78.64Shop/Dealer Price$95.39 - $112.80
Show example Mercury Marquis Spark Plug Replacement prices

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