What Does A Spark Plug Do
Spark plugs can make or break your engine’s performance. Understand how they work, how to recognize a faulty one, and get expert advice on choosing the right spark plug for better engine health.
Jul 21, 2026
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Mercury Spark Plug Wire
138 itemsMisfires, rough idle, or weak acceleration can start with aging ignition wires. Replace your spark plug wires set to help deliver steady spark and restore smoother engine performance.
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DensoPart # 671-8081
Spark Plug Wire Set - Denso 671-8081
51 Reviews
$61.99
Low stock: Only 4 left
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3-year warranty
90 days free return
Fits 1979-1979 Ford F-100, 1978-1978 Ford E-100 Econoline, 1977-1982 Ford E-250 Econoline Club Wagon, 1977-1982 Ford E-350 Econoline, 1977-1982 Ford E-350 Econoline Club Wagon, 1977-1980 Ford E-250 Econoline, 1977-1979 Ford F-150, 1977-1979 Ford F-250, 1977-1979 Ford F-350, 1977-1978 Ford LTD, 1977-1978 Lincoln Continental, 1977-1978 Lincoln Mark V, 1977-1978 Mercury Grand Marquis, 1977-1978 Mercury Marquis
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8081, 128008, 35-8169, 6718081, 96264, 700233, 16-818E, 618J,
...View moreitem #100316GL
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DensoPart # 671-4061
Spark Plug Wire Set - Denso 671-4061
51 Reviews
$60.99
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3-year warranty
90 days free return
Fits 2003-2004 Ford Focus, 2003-2003 Ford Escort, 2001-2004 Ford Escape, 2001-2004 Mazda Tribute, 2000-2002 Ford Focus, 2000-2000 Ford Contour, 2000-2000 Mercury Mystique, 1999-1999 Ford Contour, 1999-1999 Mercury Mystique
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-4061, 35-4021, 754, MSW1879, 6714061, FDZ070, 16-844E, 11-4143M,
...View moreitem #1002HSHQ
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DensoPart # 671-8074
Spark Plug Wire Set - Denso 671-8074
51 Reviews
$61.99
Low stock: Only 5 left
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3-year warranty
90 days free return
Fits 1986-1986 Mercury Grand Marquis, 1984-1985 Ford LTD, 1984-1985 Mercury Grand Marquis, 1983-1983 Ford LTD, 1983-1983 Ford LTD, 1983-1983 Ford Thunderbird, 1983-1983 Lincoln Continental, 1983-1983 Mercury Cougar, 1982-1983 Ford Mustang, 1982-1983 Lincoln Town Car, 1982-1983 Mercury Capri, 1982-1982 Lincoln Continental, 1981-1983 DeTomaso Pantera, 1981-1982 Ford F-100, 1980-1984 Ford Bronco, 1980-1984 Ford F-250, 1980-1983 Lincoln Mark VI, 1980-1983 Mercury Grand Marquis, 1980-1982 Ford Fairmont, 1980-1982 Ford LTD
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8074, 35-8162, MSW1290, 6718074, 16-808V, 11-834M, 2X1319, QW837,
...View moreitem #1003167T
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DensoPart # 671-8077
Spark Plug Wire Set - Denso 671-8077
51 Reviews
$60.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1990-1991 Mercury Grand Marquis, 1990-1990 Lincoln Town Car, 1989-1989 Mercury Grand Marquis, 1988-1991 Ford Country Squire, 1988-1991 Mercury Colony Park, 1988-1990 Ford LTD Crown Victoria, 1988-1988 Mercury Grand Marquis, 1987-1992 Lincoln Mark VII, 1986-1987 Lincoln Continental, 1986-1986 Lincoln Mark VII, 1986-1986 Mercury Grand Marquis, 1985-1987 Ford Bronco, 1985-1987 Ford E-150 Econoline, 1985-1987 Ford E-150 Econoline Club Wagon, 1985-1987 Ford E-250 Econoline, 1985-1987 Ford F-150, 1985-1987 Ford F-250, 1984-1989 Lincoln Town Car, 1984-1988 Ford Thunderbird, 1984-1988 Mercury Cougar
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8077, 35-8165, MSW1827, 6718077, 16-818A, 11-850M, 2X1329, QW897,
...View moreitem #100318QC
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Walker ProductsPart # 924-2079
Walker Products 924-2079 Spark Plug Wire Set
4.73 Reviews
$48.99
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3-year warranty
90 days free return
Fits 2007-2010 Ford Explorer Sport Trac, 2005-2010 Ford Explorer, 2005-2010 Mercury Mountaineer
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-2079, 35-6342, 3351, 9611, 8HY3351, 26694, 98239, 35-87727,
...View moreitem #1001PQ0C
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Walker ProductsPart # 924-1553
Walker Products 924-1553 Spark Plug Wire Set
4.73 Reviews
$62.99
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3-year warranty
90 days free return
Fits 2015-2015 Chevrolet Camaro, 2013-2014 Chevrolet Express 2500, 2013-2014 Chevrolet Express 3500, 2013-2013 Chevrolet Suburban 2500, 2012-2015 Chevrolet Caprice, 2012-2014 Chevrolet Suburban 1500, 2012-2012 Chevrolet Suburban 2500, 2011-2015 Ford F-250 Super Duty, 2011-2015 Ford F-350, 2011-2015 Ford F-350 Super Duty, 2011-2013 Chevrolet Silverado 3500, 2011-2013 GMC Yukon XL 2500, 2011-2013 Ram 1500, 2011-2011 Chevrolet Caprice, 2011-2011 Chevrolet Suburban 1500, 2011-2011 Ram Dakota, 2010-2015 Chevrolet Camaro, 2010-2014 Chevrolet Express Cargo, 2010-2014 Chevrolet Express Pasajeros, 2010-2014 Ford F-150
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1553
item #1001PSN3
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DensoPart # 671-6103
Spark Plug Wire Set - Denso 671-6103
51 Reviews
$34.99
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3-year warranty
90 days free return
Fits 1975-1976 Ford Granada, 1975-1976 Ford Granada, 1975-1976 Ford Maverick, 1975-1976 Ford Maverick, 1975-1976 Mercury Comet, 1975-1976 Mercury Comet, 1975-1976 Mercury Monarch, 1975-1976 Mercury Monarch, 1974-1974 Ford Bronco, 1974-1974 Ford Gran Torino, 1974-1974 Ford Gran Torino, 1974-1974 Ford Mustang II, 1974-1974 Ford Mustang II, 1974-1974 Ford Mustang II, 1974-1974 Ford Mustang II, 1974-1974 Ford Torino, 1974-1974 Mercury Comet, 1974-1974 Mercury Comet, 1974-1974 Mercury Montego, 1973-1973 Ford Bronco
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6103, 126033, 35-6188, MSW1903, 6716103, 96100, 700145, 700165,
...View moreitem #100315K4
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Walker ProductsPart # 924-1372
Walker Products 924-1372 Spark Plug Wire Set
4.73 Reviews
$50.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1986-1987 Ford Thunderbird, 1985-1985 Ford Thunderbird, 1985-1985 Ford Thunderbird, 1985-1985 Ford Thunderbird, 1985-1985 Ford Thunderbird, 1985-1985 Ford Thunderbird, 1984-1986 Ford LTD, 1984-1986 Mercury Marquis, 1984-1984 Ford Thunderbird, 1983-1987 Mercury Cougar, 1983-1986 Ford Mustang, 1983-1986 Mercury Capri, 1983-1983 Ford LTD, 1983-1983 Mercury Marquis, 1982-1983 Ford F-100, 1982-1983 Ford Thunderbird, 1982-1982 Ford Granada, 1982-1982 Lincoln Continental
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1372, 35-6159, 2980, 9077, 26638, 4831, 4136, 6638,
...View moreitem #1001PPE8
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DensoPart # 671-8094
Spark Plug Wire Set - Denso 671-8094
51 Reviews
$58.99
Low stock: Only 3 left
Edit ZIP code
3-year warranty
90 days free return
Fits 1979-1979 Lincoln Continental, 1979-1979 Lincoln Mark V, 1978-1979 Ford Bronco, 1978-1978 Mercury Grand Marquis, 1978-1978 Mercury Marquis, 1977-1979 Ford E-100 Econoline, 1977-1979 Ford E-100 Econoline Club Wagon, 1977-1979 Ford E-150 Econoline, 1977-1979 Ford E-150 Econoline Club Wagon, 1977-1979 Ford E-250 Econoline, 1977-1979 Ford E-250 Econoline Club Wagon, 1977-1979 Ford E-350 Econoline, 1977-1979 Ford E-350 Econoline Club Wagon, 1977-1979 Ford F-100, 1977-1979 Ford F-100, 1977-1979 Ford F-150, 1977-1979 Ford F-150, 1977-1979 Ford F-250, 1977-1979 Ford F-250, 1977-1979 Ford F-350
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8094, 35-8184, MSW1291, 6718094, 16-808T, 11-832M, 2X1334, QW831,
...View moreitem #100316AH
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Walker ProductsPart # 924-1483
Walker Products 924-1483 Spark Plug Wire Set
4.73 Reviews
$90.99
Low stock: Only 3 left
Edit ZIP code
3-year warranty
90 days free return
Fits 1994-1997 Ford Thunderbird, 1994-1997 Mercury Cougar
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1483, 35-8188, 3303, 9453, 26910, L-6303, CB-170, 35-87834,
...View moreitem #1001PS1X
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Walker ProductsPart # 924-2001
Walker Products 924-2001 Spark Plug Wire Set
4.73 Reviews
$43.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2006-2007 Ford Taurus, 2003-2005 Ford Taurus, 2003-2005 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2002-2004 Ford Taurus, 2001-2005 Ford Taurus, 2001-2005 Ford Taurus, 2001-2005 Mercury Sable, 2001-2004 Ford Taurus, 2001-2002 Mercury Sable, 2001-2001 Ford Taurus, 2001-2001 Mercury Sable
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-2001, 35-6339, 35-6198, 3338, 3339, 9612, 26687, 35-87702,
...View moreitem #1001PRA6
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Walker ProductsPart # 924-1224
Walker Products 924-1224 Spark Plug Wire Set
4.73 Reviews
$37.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2001-2003 Ford Escort, 2000-2000 Ford Escort, 1999-2000 Ford Escort, 1999-1999 Ford Contour, 1999-1999 Mercury Mystique, 1998-1999 Ford Escort, 1998-1999 Ford Escort, 1998-1999 Ford Escort, 1998-1999 Ford Escort, 1995-1998 Ford Contour, 1995-1998 Mercury Mystique
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1224, 35-4020, 3312, 9454, 176, 235, 3336, 4148,
...View moreitem #1001PR95
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DensoPart # 671-6116
Spark Plug Wire Set - Denso 671-6116
51 Reviews
$58.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Mercury Sable, 2002-2003 Ford Taurus, 2001-2003 Ford Taurus, 2001-2003 Ford Taurus, 2001-2003 Mercury Sable, 2001-2002 Ford Taurus, 2001-2002 Mercury Sable, 2001-2001 Mercury Sable
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6116, 35-6301, MSW2931, 6716116, 16-846C, 11-6103M, 2X1303, QW1423,
...View moreitem #10031605
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DensoPart # 671-6117
Spark Plug Wire Set - Denso 671-6117
51 Reviews
$54.99
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3-year warranty
90 days free return
Fits 2004-2006 Mercury Monterey, 2004-2005 Ford Freestar
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6117, 126049, 35-6332, 6716117, 175-6117, 16-846D, 6695
item #100317N6
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DensoPart # 671-6196
Spark Plug Wire Set - Denso 671-6196
51 Reviews
$63.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1999-2002 Mercury Villager, 1999-2002 Nissan Quest
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6196, 35-6064, 703, MSW2928, 6716196, FDX013, 16-836C, 11-6061M,
...View moreitem #100318P3
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Walker ProductsPart # 924-1272
Walker Products 924-1272 Spark Plug Wire Set
4.73 Reviews
$39.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1976-1977 Ford P-500, 1975-1976 Ford E-100 Econoline Club Wagon, 1975-1976 Ford E-150 Econoline, 1975-1976 Ford E-150 Econoline Club Wagon, 1975-1976 Ford E-250 Econoline, 1975-1976 Ford E-350 Econoline, 1975-1976 Ford F-150, 1975-1976 Ford Granada, 1975-1976 Ford Granada, 1975-1976 Ford P-400, 1975-1976 Mercury Monarch, 1975-1976 Mercury Monarch, 1975-1975 Ford P-500, 1974-1974 Ford Mustang II, 1973-1974 Ford Bronco, 1972-1976 Ford E-100 Econoline, 1972-1974 Ford E-200 Econoline, 1972-1974 Ford E-300 Econoline, 1972-1974 Ford Gran Torino, 1971-1976 Mercury Comet
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1272, 35-6189, 35-6188, 2962, 9127, 103, 143, 9119,
...View moreitem #1001PU0H
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Walker ProductsPart # 924-1856
Walker Products 924-1856 Spark Plug Wire Set
4.73 Reviews
$44.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1998-2000 Mercury Mountaineer, 1997-2001 Ford Explorer
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1856, 35-6182, 3326, 3342, 8HY3342, 26682, 4698, 4677,
...View moreitem #1001PQAC
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Walker ProductsPart # 924-1679
Walker Products 924-1679 Spark Plug Wire Set
4.73 Reviews
$71.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1999-2002 Mercury Villager, 1999-2002 Nissan Quest
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1679, 35-6064, 6077, 9635, 7153, 27700, 28232, L-2202,
...View moreitem #1001PR23
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Walker ProductsPart # 924-1397
Walker Products 924-1397 Spark Plug Wire Set
4.73 Reviews
$51.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1988-1990 Ford F-250, 1988-1990 Ford F-350, 1988-1990 Ford F-53 Motorhome Chassis, 1988-1990 Ford F-Super Duty, 1988-1988 Ford E-350 Econoline, 1983-1988 Ford E-250 Econoline Club Wagon, 1983-1988 Ford E-350 Econoline Club Wagon, 1983-1987 Ford E-350 Econoline, 1983-1987 Ford F-250, 1983-1987 Ford F-350, 1977-1978 Ford LTD, 1977-1978 Ford LTD II, 1977-1978 Ford Thunderbird, 1977-1978 Lincoln Continental, 1977-1978 Lincoln Mark V, 1977-1978 Mercury Cougar, 1977-1978 Mercury Grand Marquis, 1977-1978 Mercury Marquis, 1977-1977 Ford Bronco, 1977-1977 Ford F-100
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1397, 35-8164, 35-8178, 2971, 2977, 9083, 217, 9050,
...View moreitem #1001PUDU
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DensoPart # 671-6110
Spark Plug Wire Set - Denso 671-6110
51 Reviews
$55.99
Low stock: Only 5 left
Edit ZIP code
3-year warranty
90 days free return
Fits 2001-2002 Mercury Cougar, 2001-2001 Mazda MPV
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6110, 126041, 35-6195, 6716110, FDZ085, FDZ061, 97081, 700117,
...View moreitem #10031754
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What are spark plug wires?
Spark plug wires, also known as ignition cables or spark plug leads, are a set of wires that connect the ignition coil or distributor to the spark plugs in an internal combustion engine. They are responsible for transmitting high-voltage electrical energy from the ignition source to the spark plugs, which ignite the fuel-air mixture in the engine's cylinders.
The spark plug wires typically consist of a central core made of conductive materials such as copper, and an insulating layer made of materials like silicone or rubber to prevent electrical current from leaking. The wires are designed to withstand high temperatures and electrical interference and are often color-coded to ensure correct installation.
Signs of bad spark plug wires
Spark plug wires play a crucial role in ensuring reliable engine performance. Worn or damaged spark plug wires can cause misfires, rough idling, and poor fuel efficiency, so it's important to take regular maintenance and replace them as needed.
Engine knocking
When the spark plug wires fail, the engine may produce a knocking sound, particularly under heavy loads. This can be caused by pre-ignition or detonation, which can occur when the spark plug wires are not delivering enough energy to the spark plugs.
Rough shifting (automatic transmission)
In some cases, a damaged spark plug wire can cause rough shifting in an automatic transmission. This can be due to a drop in engine power caused by misfires or other problems related to the spark plug wires.
Burned spark plug wires
If you notice that your spark plug wires are discolored or burned, this can be a sign that they are not functioning properly. Burned spark plug wires can be caused by excessive heat, electrical interference, or other issues.
Poor acceleration
When the spark plug wires are failing, the engine may have trouble accelerating smoothly. This can be due to misfires or other problems related to the spark plug wires.
Stalling
A damaged spark plug wire can cause the engine to stall or cut out, particularly at idle. This can be due to a drop in engine power caused by misfires or other problems related to the spark plug wires.
How to change spark plug wires?
Replacing a spark plug wire set is a relatively simple task, and can usually be completed in under an hour. You can follow these steps:
1. Remove the worn or faulty spark wire set.
To avoid confusion and prevent accidentally switching the wires, it is recommended to replace each spark plug wire individually, starting with the longest one. When removing the wires from either the spark plug or distributor cap, it is important to loosen the connection by twisting or rotating the boot. Yanking or forcefully pulling on the wires may cause them to break. Only pull on the boot and refrain from pulling on the cable.
2. Install the new spark plug wire set
Install the new spark plug wires in the same location as the old wires, making sure to connect each wire to the correct spark plug. If your new spark plug wires have boots, be sure to push the boot firmly onto the spark plug until it clicks into place.
3. Test the new spark plug wires
Once you have installed the new spark plug wires, start the engine and check for any signs of misfires, rough idling, or other problems that could indicate an issue with the spark plug wires. If everything looks good, you're all set!