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 itemsShop precise fit replacement Spark Plug Wire to maintain and improve your vehicle's performance. Find the right parts for your make and model, backed by excellent customer service at A-Premium.
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DensoPart # 671-8078
Spark Plug Wire Set - Denso 671-8078
51 Reviews
$70.99
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3-year warranty
90 days free return
Fits 1984-1986 DeTomaso Pantera, 1979-1979 Ford LTD, 1979-1979 Ford LTD II, 1979-1979 Ford Ranchero, 1979-1979 Ford Thunderbird, 1980-1983 Ford E-100 Econoline, 1980-1983 Ford E-100 Econoline Club Wagon, 1980-1983 Ford E-150 Econoline, 1980-1983 Ford E-150 Econoline Club Wagon, 1980-1983 Ford E-250 Econoline, 1980-1983 Ford E-250 Econoline Club Wagon, 1980-1983 Ford E-350 Econoline, 1980-1983 Ford E-350 Econoline Club Wagon, 1981-1983 Ford F-150, 1981-1983 Ford F-250, 1981-1983 Ford F-350, 1983-1983 Ford Bronco, 1984-1986 Ford LTD, 1984-1986 Ford LTD, 1984-1987 Ford Bronco
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8078, 35-8166, 698, MSW2911, 6718078, 16-818B, 11-840M, 2X1326,
...View moreitem #1003177D
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Walker ProductsPart # 924-1663
Walker Products 924-1663 Spark Plug Wire Set
4.52 Reviews
$47.99
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3-year warranty
90 days free return
Fits 1960-1961 American Motors Rebel, 1960-1962 American Motors Ambassador, 1961-1962 American Motors Classic, 1971-1974 DeTomaso Pantera, 1960-1963 Ford F-100, 1960-1963 Ford F-250, 1960-1963 Ford F-350, 1961-1967 Ford Galaxie, 1961-1970 Ford Fairlane, 1961-1970 Ford Ranch Wagon, 1962-1966 Ford Galaxie 500, 1962-1967 Ford Country Sedan, 1962-1967 Ford Country Squire, 1962-1967 Ford Galaxie, 1962-1970 Ford Country Sedan, 1962-1970 Ford Country Squire, 1962-1970 Ford Galaxie 500, 1963-1963 Ford 300, 1963-1963 Ford 300, 1963-1963 Ford 300
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1663, 35-8196, 35-8335, 2801, 2802, 9153, 9159, JG-106,
...View moreitem #1001PP3Y
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Walker ProductsPart # 924-1550
Walker Products 924-1550 Spark Plug Wire Set
4.52 Reviews
$42.99
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3-year warranty
90 days free return
Fits 1966-1968 Alfa Romeo Duetto 1600, 1967-1968 Alfa Romeo GTV, 1967-1968 Alfa Romeo Giulia, 1967-1968 Alfa Romeo Giulia Sprint, 1969-1974 Alfa Romeo Berlina, 1969-1974 Alfa Romeo GT Veloce, 1969-1994 Alfa Romeo Spider, 1975-1977 Alfa Romeo Alfetta, 1977-1979 Alfa Romeo Sprint, 1978-1979 Alfa Romeo Sport, 1977-1978 American Motors Gremlin, 1978-1979 American Motors Concord, 1979-1979 American Motors Spirit, 1980-1982 American Motors Concord, 1980-1982 American Motors Spirit, 1981-1984 American Motors Eagle, 1992-1993 Asuna Sunrunner, 1993-1993 Asuna GT, 1993-1993 Asuna SE, 1960-1962 Austin A30
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1550
item #1001PRLU
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Walker ProductsPart # 924-1605
Walker Products 924-1605 Spark Plug Wire Set
4.52 Reviews
$55.99
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3-year warranty
90 days free return
Fits 1996-1996 Ford Explorer, 1997-1997 Ford Explorer, 1997-1997 Mercury Mountaineer
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1605, 35-8183, 2961, 3329, 3329+M4, 9542, 26925, L-6302,
...View moreitem #1001PRY0
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DensoPart # 671-6265
Spark Plug Wire Set - Denso 671-6265
51 Reviews
$63.99
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3-year warranty
90 days free return
Fits 2005-2009 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, 2005-2009 Mercury Mountaineer
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Vehicle: Mercury
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6265, 126055, 35-6342, 6716265, 97050, 6694
item #1003176Y
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DensoPart # 671-8081
Spark Plug Wire Set - Denso 671-8081
51 Reviews
$61.99
Low stock: Only 2 left
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3-year warranty
90 days free return
Fits 1977-1978 Ford LTD, 1977-1979 Ford F-150, 1977-1979 Ford F-250, 1977-1979 Ford F-350, 1977-1980 Ford E-250 Econoline, 1977-1982 Ford E-250 Econoline Club Wagon, 1977-1982 Ford E-350 Econoline, 1977-1982 Ford E-350 Econoline Club Wagon, 1978-1978 Ford E-100 Econoline, 1979-1979 Ford F-100, 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 1999-1999 Ford Contour, 2000-2000 Ford Contour, 2000-2002 Ford Focus, 2001-2004 Ford Escape, 2003-2003 Ford Escort, 2003-2004 Ford Focus, 2001-2004 Mazda Tribute, 1999-1999 Mercury Mystique, 2000-2000 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
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3-year warranty
90 days free return
Fits 1981-1983 DeTomaso Pantera, 1977-1977 Ford Granada, 1977-1977 Ford LTD, 1977-1977 Ford LTD II, 1977-1977 Ford Maverick, 1977-1977 Ford Mustang II, 1977-1977 Ford Thunderbird, 1978-1978 Ford F-250, 1978-1978 Ford F-350, 1978-1978 Ford Mustang II, 1978-1979 Ford Fairmont, 1978-1979 Ford LTD, 1978-1979 Ford LTD II, 1978-1979 Ford Ranchero, 1978-1980 Ford Granada, 1978-1981 Ford Thunderbird, 1978-1983 Ford F-100, 1978-1984 Ford F-150, 1979-1979 Ford Mustang, 1979-1980 Ford E-250 Econoline Club Wagon
Add Trim and Engine info to ensure a guaranteed fit
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
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3-year warranty
90 days free return
Fits 1984-1985 Ford LTD, 1984-1988 Ford Thunderbird, 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, 1988-1990 Ford LTD Crown Victoria, 1988-1991 Ford Country Squire, 1984-1985 Lincoln Continental, 1984-1985 Lincoln Mark VII, 1984-1989 Lincoln Town Car, 1986-1986 Lincoln Mark VII, 1986-1987 Lincoln Continental, 1987-1992 Lincoln Mark VII, 1990-1990 Lincoln Town Car, 1984-1985 Mercury Grand Marquis, 1984-1988 Mercury Cougar, 1986-1986 Mercury Grand Marquis
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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
4.52 Reviews
$48.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2005-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, 2005-2010 Mercury Mountaineer
Add Trim and Engine info to ensure a guaranteed fit
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
4.52 Reviews
$62.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1960-1961 American Motors Rebel, 1960-1964 American Motors Ambassador, 1961-1962 American Motors Classic, 1963-1966 American Motors Classic, 1965-1966 American Motors Ambassador, 1965-1966 American Motors Classic, 1965-1966 American Motors Marlin, 1965-1967 American Motors Marlin, 1966-1966 American Motors Ambassador, 1966-1969 American Motors Ambassador, 1967-1967 American Motors American, 1967-1967 American Motors Marlin, 1967-1968 American Motors American, 1967-1968 American Motors Rebel, 1967-1969 American Motors Ambassador, 1967-1969 American Motors Rebel, 1968-1969 American Motors AMX, 1968-1969 American Motors AMX, 1968-1969 American Motors AMX, 1968-1969 American Motors Ambassador
Add Trim and Engine info to ensure a guaranteed fit
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
Edit ZIP code
3-year warranty
90 days free return
Fits 1960-1960 Ford Courier Sedan Delivery, 1960-1960 Ford Galaxie, 1960-1960 Ford Starliner, 1960-1960 Ford Sunliner, 1960-1960 Ford Victoria, 1960-1961 Ford Fairlane, 1960-1961 Ford Falcon, 1960-1961 Ford Ranchero, 1960-1964 Ford Country Sedan, 1960-1964 Ford Country Squire, 1960-1964 Ford Ranch Wagon, 1961-1961 Ford Falcon Sedan Delivery, 1961-1964 Ford Galaxie, 1962-1962 Ford Fairlane, 1962-1962 Ford Falcon, 1962-1962 Ford Falcon, 1962-1962 Ford Ranch Wagon, 1962-1963 Ford Club Wagon, 1962-1963 Ford Club Wagon, 1962-1964 Ford Falcon Sedan Delivery
Add Trim and Engine info to ensure a guaranteed fit
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
4.52 Reviews
$50.99
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3-year warranty
90 days free return
Fits 1982-1982 Ford Granada, 1982-1983 Ford F-100, 1982-1983 Ford Thunderbird, 1983-1983 Ford LTD, 1983-1986 Ford Mustang, 1984-1984 Ford Thunderbird, 1984-1986 Ford LTD, 1985-1985 Ford Thunderbird, 1985-1985 Ford Thunderbird, 1985-1985 Ford Thunderbird, 1985-1985 Ford Thunderbird, 1985-1985 Ford Thunderbird, 1986-1987 Ford Thunderbird, 1982-1982 Lincoln Continental, 1983-1983 Mercury Marquis, 1983-1986 Mercury Capri, 1983-1987 Mercury Cougar, 1984-1986 Mercury Marquis
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 2 left
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3-year warranty
90 days free return
Fits 1975-1976 Ford LTD, 1977-1977 Ford Custom 500, 1977-1978 Ford LTD, 1977-1978 Ford LTD, 1977-1978 Ford LTD II, 1977-1978 Ford LTD II, 1977-1978 Ford Ranchero, 1977-1978 Ford Ranchero, 1977-1978 Ford Thunderbird, 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
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
4.52 Reviews
$90.99
Low stock: Only 4 left
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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
4.52 Reviews
$43.99
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3-year warranty
90 days free return
Fits 2001-2001 Ford Taurus, 2001-2004 Ford Taurus, 2001-2005 Ford Taurus, 2001-2005 Ford Taurus, 2002-2004 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2003-2005 Ford Taurus, 2003-2005 Ford Taurus, 2006-2007 Ford Taurus, 2001-2001 Mercury Sable, 2001-2002 Mercury Sable, 2001-2005 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
4.52 Reviews
$37.99
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3-year warranty
90 days free return
Fits 1995-1998 Ford Contour, 1998-1999 Ford Escort, 1998-1999 Ford Escort, 1998-1999 Ford Escort, 1998-1999 Ford Escort, 1999-1999 Ford Contour, 1999-2000 Ford Escort, 2000-2000 Ford Escort, 2001-2003 Ford Escort, 1995-1998 Mercury Mystique, 1999-1999 Mercury Mystique
Add Trim and Engine info to ensure a guaranteed fit
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 2001-2002 Ford Taurus, 2001-2003 Ford Taurus, 2001-2003 Ford Taurus, 2002-2003 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2001-2001 Mercury Sable, 2001-2002 Mercury Sable, 2001-2003 Mercury Sable, 2003-2003 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
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2005 Ford Freestar, 2004-2006 Mercury Monterey
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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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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!