How should spark plug wires be inspected and maintained on Kia Optima?

Some models utilize an ignition coil mounted on each spark plug instead of spark plug wires. The spark plug wires should be checked whenever new spark plugs are installed. Begin by visually inspecting the spark plug wires while the engine is running in a darkened garage with adequate ventilation. Observe each plug wire carefully, avoiding contact with moving engine parts. If a break in the wire is present, arcing or a small spark will be visible at the damaged area, indicating the need for new wires; allow the engine to cool and check the ignition coil packs afterward. Inspect the spark plug wires one at a time to maintain the correct order for proper engine operation, using numbered labels or tape if necessary. To disconnect a plug wire, grasp the rubber boot, twist it half a turn, and pull it free without tugging on the wire itself. Check inside the boot for corrosion, which appears as a white crusty powder; light corrosion can be cleaned with a small wire brush, but heavily corroded wires should be replaced. Reattach the wire and boot to the spark plug, ensuring a tight fit; if it's loose, use pliers to crimp the metal connector inside the boot. Wipe the entire length of the wire with a clean rag to remove dirt and grease, then inspect for burns, cracks, and other damage, avoiding sharp bends that could break the conductor. Disconnect the wire from the ignition coil pack by pulling only on the rubber boot, checking for corrosion and ensuring a tight fit before reconnecting. Inspect all remaining spark plug wires to confirm they are securely fastened at both the coil pack and spark plug. If new spark plug wires are necessary, purchase a set specific to the engine model and replace them one at a time to prevent mix-ups in firing order. Clean the coil pack and spark plug wires with a damp cloth and dry them thoroughly, while also inspecting the coil pack for cracks, damage, and carbon tracking.

Genuine Kia Optima Spark Plug Wire

Spark Plug Ignition Wires

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12 Spark Plug Wires found

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Kia Optima Ignition Coiling Harness
Part Number: 396103E600
$75.22 MSRP: $106.70
You Save: $31.48 (30%)
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Product Specifications
- Other Name: Harness-Ignition Coil; Cable Set, Harness
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2010 Kia Optima | High Grade, Middle Grade | 2.7L, 2.7L - MU | 4 Door Sedan, Sedan - 4Door 5P
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Kia Optima Spark Plug Cable Assembly No.1
Part Number: 2742037101
$22.14 MSRP: $30.00
You Save: $7.86 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cable Assembly-Spark Plug No.1
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L, 2.7L | 4 Door Sedan
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Kia Optima Ignition Coiling Harness
Part Number: 396103E100
$33.11 MSRP: $46.97
You Save: $13.86 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Harness-Ignition Coil; Harness
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006 Kia Optima | High Grade, Middle Grade | 2.7L | 4 Door Sedan
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Kia Optima Spark Plug Cable Assembly No.2
Part Number: 2743037101
$17.76 MSRP: $24.07
You Save: $6.31 (27%)
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Product Specifications
- Other Name: Cable Assembly-Spark Plug No.2
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L, 2.7L | 4 Door Sedan
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Kia Optima Spark Plug Cable Assembly No.4
Part Number: 2745037101
$17.76 MSRP: $24.07
You Save: $6.31 (27%)
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Product Specifications
- Other Name: Cable Assembly-Spark Plug No.4
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L, 2.7L | 4 Door Sedan
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Kia Optima Spark Plug Cable Assembly No.5
Part Number: 2746037101
$17.22 MSRP: $23.34
You Save: $6.12 (27%)
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Product Specifications
- Other Name: Cable Assembly-Spark Plug No.5
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L, 2.7L | 4 Door Sedan
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Kia Optima Spark Plug Cable Assembly No.6
Part Number: 2747037101
$17.75 MSRP: $24.05
You Save: $6.30 (27%)
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Product Specifications
- Other Name: Cable Assembly-Spark Plug No.6
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L, 2.7L | 4 Door Sedan
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Kia Optima Spark Plug Cable Assembly No.3
Part Number: 2744037101
$22.14 MSRP: $30.00
You Save: $7.86 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cable Assembly-Spark Plug No.3
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L, 2.7L | 4 Door Sedan
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Kia Optima Spark Plug Cable Assembly No.1
Part Number: 2742038020
$17.08 MSRP: $24.02
You Save: $6.94 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Cable Assembly-Spark Plug No.1; Plug Wire
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.4L | 4 Door Sedan
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Kia Optima Spark Plug Cable Set
Part Number: 2750138B00
Product Specifications
- Other Name: Cable Set-Spark Plug; Cable Set
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.4L | 4 Door Sedan
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Kia Optima Spark Plug Cable Set
Part Number: 2750137A00
Product Specifications
- Other Name: Cable Set-Spark Plug; Cable Set, Plug Wire Set
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.5L, 2.7L | 4 Door Sedan
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Kia Optima Spark Plug Cable Assembly No.3
Part Number: 2744038020
Product Specifications
- Other Name: Cable Assembly-Spark Plug No.3; Plug Wire
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2005 Kia Optima | High Grade, Middle Grade | 2.4L | 4 Door Sedan

Kia Optima Spark Plug Wire

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Kia Optima Spark Plug Wire Parts Questions & Experts Answers

Ignition Coiling Harness
396103E600
Q: How should spark plug wires be inspected and maintained on Kia Optima?
A:
Some models utilize an ignition coil mounted on each Spark Plug instead of spark plug wires. The spark plug wires should be checked whenever new spark plugs are installed. Begin by visually inspecting the spark plug wires while the engine is running in a darkened garage with adequate ventilation. Observe each plug wire carefully, avoiding contact with moving engine parts. If a break in the wire is present, arcing or a small spark will be visible at the damaged area, indicating the need for new wires; allow the engine to cool and check the ignition coil packs afterward. Inspect the spark plug wires one at a time to maintain the correct order for proper engine operation, using numbered labels or tape if necessary. To disconnect a plug wire, grasp the rubber boot, twist it half a turn, and pull it free without tugging on the wire itself. Check inside the boot for corrosion, which appears as a white crusty powder; light corrosion can be cleaned with a small wire brush, but heavily corroded wires should be replaced. Reattach the wire and boot to the spark plug, ensuring a tight fit; if it's loose, use pliers to crimp the metal connector inside the boot. Wipe the entire length of the wire with a clean rag to remove dirt and grease, then inspect for burns, cracks, and other damage, avoiding sharp bends that could break the conductor. Disconnect the wire from the ignition coil pack by pulling only on the rubber boot, checking for corrosion and ensuring a tight fit before reconnecting. Inspect all remaining spark plug wires to confirm they are securely fastened at both the coil pack and spark plug. If new spark plug wires are necessary, purchase a set specific to the engine model and replace them one at a time to prevent mix-ups in firing order. Clean the coil pack and spark plug wires with a damp cloth and dry them thoroughly, while also inspecting the coil pack for cracks, damage, and carbon tracking.

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