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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Toyota 4Runner Spark Plug Wire
33 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 # 671-6182
Denso 671-6182 Spark Plug Wire
51 Reviews
$55.99
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3-year warranty
90 days free return
Fits 2001-2002 Toyota 4Runner, 2000-2004 Toyota Tundra, 1996-2000 Toyota 4Runner, 1995-2004 Toyota Tacoma, 1995-1998 Toyota T100
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6182, 35-6050, 644, MSW2787, 6716182, TE66, 936R, 11-6048S,
...View moreitem #100317GQ
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Walker ProductsPart # 924-1550
Walker Products 924-1550 Spark Plug Wire Set
4.73 Reviews
$42.99
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3-year warranty
90 days free return
Fits 2010-2010 Chrysler PT Cruiser, 2009-2009 Chrysler PT Cruiser, 2008-2009 Chrysler PT Cruiser, 2008-2008 Chrysler PT Cruiser, 2008-2008 Mini Cooper, 2007-2007 Chrysler PT Cruiser, 2007-2007 Mini Cooper, 2006-2006 Chrysler PT Cruiser, 2006-2006 Chrysler PT Cruiser, 2006-2006 Chrysler PT Cruiser, 2006-2006 Chrysler Sebring, 2006-2006 Dodge Viper, 2005-2008 Chrysler PT Cruiser, 2005-2006 Mini Cooper, 2005-2005 Dodge Viper, 2004-2009 Chrysler PT Cruiser, 2004-2008 Chrysler PT Cruiser, 2004-2006 Dodge Ram 1500, 2004-2005 Chrysler Sebring, 2004-2004 Chrysler PT Cruiser
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Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1550
item #1001PRLU
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Walker ProductsPart # 924-1079
Walker Products 924-1079 Spark Plug Wire Set
4.73 Reviews
$37.99
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3-year warranty
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Fits 1988-1988 Toyota 4Runner, 1988-1988 Toyota Pickup, 1986-1987 Toyota Pickup, 1986-1987 Toyota Pickup, 1985-1987 Toyota Pickup, 1985-1985 Toyota Pickup, 1984-1987 Toyota 4Runner, 1984-1987 Toyota Pickup, 1984-1987 Toyota Pickup, 1984-1987 Toyota Pickup, 1981-1985 Toyota Celica, 1981-1983 Toyota Pickup, 1979-1980 Toyota Celica, 1975-1982 Toyota Corona, 1971-1973 Saab 95, 1971-1973 Saab 96, 1969-1974 Saab Sonett, 1968-1970 Saab 95, 1968-1970 Saab 96, 1968-1968 Saab Sonett
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Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1079, 35-4003, 8146, 8148, TX89, TZ37, 4530, 9302,
...View moreitem #1001PPE7
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Walker ProductsPart # 924-1314
Walker Products 924-1314 Spark Plug Wire Set
4.73 Reviews
$50.99
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3-year warranty
90 days free return
Fits 1994-1994 Toyota T100, 1993-1993 Toyota T100, 1992-1995 Toyota 4Runner, 1992-1995 Toyota Pickup
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Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1314, 35-6039, 6319, 9344, 23014, 25601, L-9030, 35-57507,
...View moreitem #1001PRH8
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Walker ProductsPart # 924-1297
Walker Products 924-1297 Spark Plug Wire Set
4.73 Reviews
$49.99
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3-year warranty
90 days free return
Fits 1988-1991 Toyota 4Runner, 1988-1991 Toyota Pickup
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1297, 35-6041, TX11, 6257, 9354, 6312, 27631, 28122,
...View moreitem #1001PRA9
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DensoPart # 671-4138
Spark Plug Wire Set - Denso 671-4138
51 Reviews
$33.99
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3-year warranty
90 days free return
Fits 1989-1992 Toyota 4Runner, 1989-1992 Toyota Pickup
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
671-4138, 35-4069, 351, 6714138, TX99A, 914T, 2X1658, QW742,
...View moreitem #10030Z1E
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DensoPart # 671-6173
Spark Plug Wire Set - Denso 671-6173
51 Reviews
$63.99
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3-year warranty
90 days free return
Fits 1988-1991 Toyota 4Runner, 1988-1991 Toyota Pickup
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6173, 402, MSW2173, 35-6041, 6716173, TX11, TX12, 906D,
...View moreitem #100316TZ
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DensoPart # 671-6171
Spark Plug Wire Set - Denso 671-6171
51 Reviews
$66.99
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3-year warranty
90 days free return
Fits 1994-1994 Toyota T100, 1993-1993 Toyota T100, 1992-1995 Toyota 4Runner, 1992-1995 Toyota Pickup
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
671-6171, 35-6039, 804, MSW2721, 6716171, TX50, 926A, 11-6008S,
...View moreitem #1003176E
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Walker ProductsPart # 924-1104
Walker Products 924-1104 Spark Plug Wire Set
4.73 Reviews
$28.99
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3-year warranty
90 days free return
Fits 1989-1992 Toyota 4Runner, 1989-1992 Toyota Pickup, 1975-1980 Toyota Pickup
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1104, 35-4069, 9799, TX99A, 4510, 9231, 27413, 35-77304,
...View moreitem #1001PQV8
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Walker ProductsPart # 924-1520
Walker Products 924-1520 Spark Plug Wire Set
4.73 Reviews
$34.99
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3-year warranty
90 days free return
Fits 2001-2002 Toyota 4Runner, 2000-2004 Toyota Tundra, 1996-2000 Toyota 4Runner, 1995-2004 Toyota Tacoma, 1995-1998 Toyota T100
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1520, 35-6050, 9578, 6325, 5SHY-6325, 23025, 25605, 35-57539,
...View moreitem #1001PU99
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DensoPart # 671-4143
Denso 671-4143 Spark Plug Wire
51 Reviews
$59.99
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3-year warranty
90 days free return
Fits 1998-2000 Toyota Tacoma, 1998-1998 Toyota T100, 1997-2000 Toyota 4Runner, 1997-2000 Toyota Tacoma
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
671-4143, 35-4074, 658, MSW2730, 6714143, TX67, 964F, 11-4121S,
...View moreitem #10030YQP
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Walker ProductsPart # 924-1212
Walker Products 924-1212 Spark Plug Wire Set
4.73 Reviews
$38.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1993-1995 Toyota 4Runner, 1993-1995 Toyota Pickup
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
924-1212, 35-4068, 4417, TX59, 4569, 9488, SSHY-4569, 23023,
...View moreitem #1001PTD3
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DensoPart # 671-4137
Spark Plug Wire Set - Denso 671-4137
51 Reviews
$46.99
Enter ZIP codeFree standard shipping
3-year warranty
90 days free return
Fits 1993-1995 Toyota 4Runner, 1993-1995 Toyota Pickup
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Toyota 4Runner
Item LocatedUnited States
QuantityOne Set
Part interchange
671-4137, 35-4068, 488, MSW2720, 6714137, EUC050, TX59, 944J,
...View moreitem #100311QR
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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!