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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Ford Spark Plug Wire
262 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 # 671-8091
Spark Plug Wire Set - Denso 671-8091
51 Reviews
$115.99
Low stock: Only 1 left
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3-year warranty
90 days free return
Fits 1996-1998 Ford Mustang
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Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8091, 128020, 35-8181, 6718091, 96072, 700943, 16-818W, CH8885,
...View moreitem #1003180P
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DensoPart # 671-8105
Spark Plug Wire Set - Denso 671-8105
51 Reviews
$46.99
Low stock: Only 3 left
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3-year warranty
90 days free return
Fits 1976-1976 Mercury Comet, 1976-1976 Mercury Monarch, 1975-1977 Ford F-500, 1975-1977 Ford Ranchero, 1975-1976 Ford Bronco, 1975-1976 Ford Custom 500, 1975-1976 Ford E-100 Econoline, 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-250 Econoline, 1975-1976 Ford E-250 Econoline Club Wagon, 1975-1976 Ford E-350 Econoline, 1975-1976 Ford E-350 Econoline, 1975-1976 Ford Elite, 1975-1976 Ford Elite, 1975-1976 Ford F-100, 1975-1976 Ford F-100, 1975-1976 Ford F-150
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Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8105, 128036, 35-8195, 6718105, 96205, 700162, 16-808R, CH833,
...View moreitem #100313U9
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DensoPart # 671-8102
Spark Plug Wire Set - Denso 671-8102
51 Reviews
$52.99
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3-year warranty
90 days free return
Fits 1976-1977 Ford P-500, 1976-1976 Ford P-350, 1976-1976 Ford P-400, 1974-1974 Lincoln Continental, 1974-1974 Lincoln Mark IV, 1973-1973 Ford M-400, 1973-1973 Ford M-400, 1973-1973 Ford P-350, 1972-1974 Lincoln Mark IV, 1972-1973 Ford P-350, 1972-1972 Ford Gran Torino, 1971-1972 Ford Country Sedan, 1971-1972 Mercury Comet, 1971-1971 Ford Country Sedan, 1971-1971 Ford Country Squire, 1971-1971 Ford Custom, 1971-1971 Ford Custom 500, 1971-1971 Ford Galaxie 500, 1971-1971 Ford LTD, 1971-1971 Ford LTD
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Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8102, 128033, 35-8335, 6718102, 96205, 96219, 96269, 700105,
...View moreitem #100315Y0
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DensoPart # 671-8080
Spark Plug Wire Set - Denso 671-8080
51 Reviews
$63.99
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3-year warranty
90 days free return
Fits 1996-1996 Ford Econoline Super Duty, 1988-1997 Ford F-350, 1988-1996 Ford Bronco, 1988-1996 Ford E-150 Econoline, 1988-1996 Ford E-150 Econoline Club Wagon, 1988-1996 Ford E-250 Econoline, 1988-1996 Ford E-350 Econoline, 1988-1996 Ford E-350 Econoline Club Wagon, 1988-1996 Ford F-150, 1988-1996 Ford F-250, 1988-1991 Ford E-250 Econoline Club Wagon, 1987-1989 DeTomaso Pantera
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Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8080, 35-8168, 737, MSW1863, 6718080, 16-818D, 11-852M, 2X1368,
...View moreitem #100314Z4
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DensoPart # 671-6104
Spark Plug Wire Set - Denso 671-6104
51 Reviews
$31.99
Low stock: Only 2 left
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3-year warranty
90 days free return
Fits 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-100, 1975-1976 Ford F-150, 1975-1976 Ford F-250, 1975-1976 Ford F-350, 1972-1976 Ford E-100 Econoline, 1972-1974 Ford E-200 Econoline, 1972-1974 Ford E-300 Econoline, 1969-1974 Ford E-100 Econoline, 1969-1974 Ford E-100 Econoline, 1969-1974 Ford E-200 Econoline, 1969-1974 Ford E-300 Econoline, 1969-1971 Ford E-100 Econoline, 1969-1971 Ford E-200 Econoline, 1969-1970 Ford E-100 Econoline, 1969-1970 Ford E-300 Econoline
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6104, 126034, 35-6189, 6716104, 96100, 700126, 16-806X, CH624,
...View moreitem #100313KC
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DensoPart # 671-6101
Spark Plug Wire Set - Denso 671-6101
51 Reviews
$54.99
Low stock: Only 1 left
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3-year warranty
90 days free return
Fits 1999-2000 Ford Windstar
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Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6101, 35-6186, MSW1868, 6716101, 16-826H, 11-6067M, 2X1355, QW1339,
...View moreitem #100316VC
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DensoPart # 671-6261
Spark Plug Wire Set - Denso 671-6261
51 Reviews
$52.99
Low stock: Only 2 left
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3-year warranty
90 days free return
Fits 2003-2003 Ford Ranger
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Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6261, 126053, 35-6340, 6716261, FDZ074, 6692
item #1003179T
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DensoPart # 671-4065
Spark Plug Wire Set - Denso 671-4065
51 Reviews
$49.99
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3-year warranty
90 days free return
Fits 2009-2011 Ford Ranger, 2008-2008 Ford Ranger, 2001-2010 Mazda B2300, 2001-2007 Ford Ranger
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-4065, 124016, 696, 35-4408, 6714065, FDZ086, 52003, 97112,
...View moreitem #1002HUP1
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DensoPart # 671-8100
Spark Plug Wire Set - Denso 671-8100
51 Reviews
$101.99
Low stock: Only 3 left
Edit ZIP code
3-year warranty
90 days free return
Fits 1999-1999 Ford E-150 Econoline, 1999-1999 Ford E-150 Econoline Club Wagon, 1999-1999 Ford Expedition, 1999-1999 Ford F-150, 1999-1999 Ford F-250
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8100, 128030, 35-8190, 6718100, 97058, 700944, 16-818X, CH8890,
...View moreitem #100318AR
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DensoPart # 671-8085
Spark Plug Wire Set - Denso 671-8085
51 Reviews
$60.99
Low stock: Only 4 left
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3-year warranty
90 days free return
Fits 1994-1996 Ford Bronco, 1994-1996 Ford F-150, 1994-1996 Ford F-250
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Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8085, 128013, 35-8174, 6718085, 96258, 700313, 16-818K, CH8876,
...View moreitem #1003150P
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DensoPart # 671-6113
Denso 671-6113 Spark Plug Wire
51 Reviews
$53.99
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3-year warranty
90 days free return
Fits 2007-2007 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2002-2003 Ford Taurus, 2001-2003 Ford Taurus, 2001-2003 Ford Taurus, 2001-2003 Ford Taurus, 2001-2003 Mercury Sable, 2001-2002 Mercury Sable, 2001-2001 Ford Taurus, 2001-2001 Mercury Sable
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6113, 35-6198, 695, MSW1877, 6716113, 16-836X, 11-6102M, 2X1303,
...View moreitem #100317RN
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DensoPart # 671-6111
Spark Plug Wire Set - Denso 671-6111
51 Reviews
$53.99
Low stock: Only 3 left
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3-year warranty
90 days free return
Fits 2001-2003 Ford Windstar
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6111, 126042, 35-6196, MSW1878, 6716111, 97047, 700138, 16-836V,
...View moreitem #1003147G
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DensoPart # 671-6237
Spark Plug Wire Set - Denso 671-6237
51 Reviews
$64.99
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3-year warranty
90 days free return
Fits 2005-2006 Ford Mustang
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Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6237, 126050, 35-6336, 6716237
item #10031625
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DensoPart # 671-8104
Spark Plug Wire Set - Denso 671-8104
51 Reviews
$49.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1974-1974 Ford Gran Torino, 1974-1974 Ford Gran Torino, 1974-1974 Ford Gran Torino, 1974-1974 Ford Gran Torino, 1974-1974 Ford Gran Torino, 1974-1974 Ford Ranchero, 1974-1974 Ford Ranchero, 1974-1974 Ford Ranchero, 1974-1974 Ford Torino, 1974-1974 Mercury Cougar, 1974-1974 Mercury Montego, 1974-1974 Mercury Montego, 1974-1974 Mercury Montego, 1974-1974 Mercury Montego, 1973-1974 Ford Country Sedan, 1973-1974 Ford Country Squire, 1973-1974 Ford Galaxie 500, 1973-1974 Ford Gran Torino, 1973-1974 Ford Gran Torino, 1973-1974 Ford LTD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-8104, 128035, 35-8194, 6718104, 96205, 700148, 700161, 16-808Q,
...View moreitem #100315KN
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DensoPart # 671-4055
Spark Plug Wire Set - Denso 671-4055
51 Reviews
$53.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1994-1994 Mazda B2300, 1992-1994 Ford Ranger, 1991-1993 Ford Mustang
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-4055, 606, 35-4018, MSW1835, 6714055, FDZ033, 52150, 16-814P,
...View moreitem #1002HUZ6
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DensoPart # 671-6281
Spark Plug Wire Set - Denso 671-6281
51 Reviews
$52.99
Low stock: Only 1 left
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3-year warranty
90 days free return
Fits 2007-2007 Ford Freestar, 2007-2007 Mercury Monterey, 2006-2006 Ford Freestar
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6281, 126058, 811, 6716281, 97121, 700590, CH8681, 2X1869,
...View moreitem #100316U4
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DensoPart # 671-6098
Spark Plug Wire Set - Denso 671-6098
51 Reviews
$52.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2000-2000 Ford Explorer, 2000-2000 Ford Explorer, 1999-2000 Ford Explorer, 1997-2000 Ford Explorer, 1997-2000 Ford Explorer, 1997-2000 Ford Ranger, 1997-1999 Ford Explorer, 1997-1997 Ford Aerostar
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6098, 35-6183, 675, MSW1862, 6716098, FDZ066, 16-826E, 11-6056M,
...View moreitem #100317T2
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DensoPart # 671-6089
Spark Plug Wire Set - Denso 671-6089
51 Reviews
$60.99
Low stock: Only 1 left
Edit ZIP code
3-year warranty
90 days free return
Fits 2000-2000 Ford Taurus, 2000-2000 Ford Taurus, 2000-2000 Ford Taurus, 2000-2000 Ford Taurus, 2000-2000 Ford Taurus, 2000-2000 Ford Taurus, 2000-2000 Mercury Sable, 1999-2000 Ford Taurus, 1999-2000 Ford Taurus, 1999-1999 Ford Taurus, 1998-1998 Ford Taurus, 1998-1998 Ford Taurus, 1998-1998 Ford Taurus, 1998-1998 Mercury Sable, 1998-1998 Mercury Sable, 1996-2000 Mercury Sable, 1996-1999 Mercury Sable, 1996-1999 Mercury Sable, 1996-1997 Ford Taurus, 1996-1997 Ford Taurus
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6089, 35-6175, 742, 6716089, 16-816V, 2X1351, QW1140, 126019,
...View moreitem #1003161H
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DensoPart # 671-6112
Spark Plug Wire Set - Denso 671-6112
51 Reviews
$60.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2001-2005 Mazda B3000, 2001-2002 Ford Ranger
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6112, 35-6197, 694, MSW1876, 6716112, FDZ074, 936W, 16-836W,
...View moreitem #100315VG
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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 2004-2006 Mercury Monterey, 2004-2005 Ford Freestar
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Ford
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6117, 126049, 35-6332, 6716117, 175-6117, 16-846D, 6695
item #100317N6
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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!