Mercury Marquis Ignition Coil Replacement at your home or office.

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Ignition Coil Replacement Estimate for Mercury Marquis

Mercury Marquis Ignition Coil Replacement costs $178 on average.

CarServiceEstimateShop/Dealer Price
1983 Mercury MarquisL6-3.3LService typeIgnition Coil ReplacementEstimate$273.75Shop/Dealer Price$329.59 - $469.21
1973 Mercury MarquisV8-5.8LService typeIgnition Coil ReplacementEstimate$253.75Shop/Dealer Price$309.61 - $449.24
1979 Mercury MarquisV8-5.0LService typeIgnition Coil ReplacementEstimate$232.67Shop/Dealer Price$283.26 - $407.08
1974 Mercury MarquisV8-5.8LService typeIgnition Coil ReplacementEstimate$253.75Shop/Dealer Price$309.59 - $449.20
1979 Mercury MarquisV8-5.8LService typeIgnition Coil ReplacementEstimate$253.75Shop/Dealer Price$309.62 - $449.27
1970 Mercury MarquisV8-5.8LService typeIgnition Coil ReplacementEstimate$253.75Shop/Dealer Price$309.61 - $449.24
1978 Mercury MarquisV8-5.8LService typeIgnition Coil ReplacementEstimate$258.75Shop/Dealer Price$314.47 - $454.00
1984 Mercury MarquisL4-2.3LService typeIgnition Coil ReplacementEstimate$258.75Shop/Dealer Price$314.84 - $454.66
Show example Mercury Marquis Ignition Coil Replacement prices

Ignition Coil Replacement Service

What is an ignition coil and how does it work?

An ignition coil transforms ignition voltage (12 volts) to the very high voltage pulses (20,000 volts or more) that fire the spark plugs. The number of ignition coils varies depending on car model and year of production. Older cars will have one coil covering all engine cylinders while newer cars may have a coil-on-plug type arrangement — that is every cylinder will have its own dedicated ignition coil.

Ignition Coils

When to consider replacing an ignition coil:

  • Hard starting or no start. Ignition coils are subject to heat damage and electrical overload, both of which can cause partial or total failure. If the coil is faulty, you may have difficulty starting your car or it may not start at all.
  • Misfiring, loss of power, poor acceleration. Once the car is running, a bad ignition coil can cause poor operation of the engine. Should you have misfiring or loss of power, faulty ignition coils would be among the list of causes a mechanic would investigate. The Check Engine Light will often come on with a trouble code(s) indicating which cylinders are involved.

How do mechanics replace the ignition coil?

  • The ignition is checked to assure it is in the “off” position.
  • For single coils that supply all cylinders, the coil is disconnected from either a bracket located in the engine compartment or, in some cases, is removed from within the distributor. The replacement coil is secured and all electrical connections reattached. If the distributor was removed for any reason, the timing is adjusted as required.
  • For individual coil-on-plug applications, the coil is detached from the top of the individual spark plug and replaced.
  • Once the coil is securely in place, all electrical connections are reattached, and timing adjusted as needed, the car is road tested to ensure normal operation.

Is it safe to drive with an ignition coil problem?

Yes. A malfunctioning ignition coil will cause loss of power and lower fuel efficiency but that will not present an immediate safety issue. If the coil malfunction is causing misfiring, this will allow unburned fuel to enter and permanently damage the catalytic converter from overheating.

When replacing an ignition coil keep in mind:

  • Ignition coil failure can be caused by faulty spark plugs or wires. The mechanic will inspect and may recommend replacement of those components.
  • In a coil-on-plug ignition system, if only one coil fails, you need only replace the faulty coil. Remaining functioning coils can be left in place.
  • In systems with the coil located in the distributor, it may be more cost-effective to replace the entire distributor rather than remove and replace just the coil.

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Meet some of our expert Mercury mechanics

Real customer reviews from Mercury owners like you.

Excellent Rating

(22)

Rating Summary
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Angel

28 years of experience
118 reviews
Angel
28 years of experience
Mercury Sable V6-3.0L - Ignition Coil - Phoenix, Arizona
Good fast work

Duane

25 years of experience
481 reviews
Duane
25 years of experience
Mercury Grand Marquis V8-4.6L - Ignition Coil - San Diego, California
Duane was quick and efficient. Great about keeping pricing reasonable.

Robert

20 years of experience
996 reviews
Robert
20 years of experience
Mercury Capri L4-1.6L - Ignition Coil Replacement - Denver, Colorado
Excellent service. The speed, quality, convenience, and price has prompted me to user YourMechanic more often than a traditional shop.

Robert

20 years of experience
996 reviews
Robert
20 years of experience
Mercury Grand Marquis V8-4.6L - Ignition Coil - Broomfield, Colorado
Robert is helpful as always. He's now my go-to guy when I need any maintenance done on my car.

Excellent Rating

(22)

Rating Summary
21
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1
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Number of Mercury Ignition Coil Replacement services completed
242+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercury MECHANICS
600+
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