What should you consider when replacing spark plugs on Kia Optima?

When replacing spark plugs, do not adjust the gap on platinum or iridium plugs, as they are pregapped by the manufacturer and using a gapping tool could damage the electrode plating. A spark plug socket with a rubber grommet is necessary to protect the porcelain insulator and hold the plug during installation. Purchase new plugs and replace them one at a time, inspecting each for defects; any cracks in the porcelain insulator indicate that the plug should not be used. Remove engine covers and disconnect any hoses or components that obstruct access. For V6 engines, the upper intake manifold must be removed to reach the rear plugs. If the plugs have conventional wires, pull them by the boots, while those with coils require disconnecting the coil wiring and unbolting each coil. Use compressed air to clear dirt from the spark plug area before removal. A proper spark plug socket and extension are needed due to the deep recess of the plugs. Compare old plugs with those inside the back cover to assess engine condition, and apply a small amount of anti-seize compound to the threads to prevent damage during future removals. To avoid cross-threading, use a short piece of rubber hose over the plug to help align it with the hole; if cross-threading occurs, the hose will slip, preventing damage. Tighten the plug to the specified torque and securely attach the plug wires before reinstalling any removed components.

Genuine Kia Optima Spark Plug

Ignition Spark Plug

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12 Spark Plugs found

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Kia Optima Spark Plug Assembly
Part Number: 1884911070
$17.28 MSRP: $24.72
You Save: $7.44 (31%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Plug Assembly-Spark; Spark Plug
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2016-2020 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Spark Plug Assembly
Part Number: 1884711160
$19.75 MSRP: $26.77
You Save: $7.02 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Plug Assembly-Spark; Spark Plug
- Replaced by: 1885111060
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2015 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Spark Plug Assembly
Part Number: 1885709085
$17.68 MSRP: $25.30
You Save: $7.62 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Plug Assembly-Spark; Spark Plug
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2019-2020 Kia Optima | 2.0L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Spark Plug Assembly
Part Number: 1884511160
$18.45 MSRP: $26.40
You Save: $7.95 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Plug Assembly-Spark; Spark Plug
- Manufacturer Note: IRIDUIM
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2008-2010 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Spark Plug Assembly
Part Number: 1884908080
$21.68 MSRP: $31.02
You Save: $9.34 (31%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Plug Assembly-Spark; Spark Plug
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2016-2020 Kia Optima | 1.6L - GAMMA | Sedan - 4Door 5P
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Kia Optima Spark Plug Assembly
Part Number: 1884909085
$24.45 MSRP: $34.99
You Save: $10.54 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Plug Assembly-Spark; Spark Plug
- Replaces: 1884708220, 1884708200
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2018 Kia Optima | 2.0L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Spark Plug Assembly
Part Number: 1884708200
$24.45 MSRP: $34.99
You Save: $10.54 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Plug Assembly-Spark
- Replaced by: 1884909085
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2013 Kia Optima | 2.0L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Spark Plug Assembly
Part Number: 1884708220
$24.45 MSRP: $34.99
You Save: $10.54 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Plug Assembly-Spark
- Replaced by: 1884909085
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2015 Kia Optima | 2.0L - Theta 2 | Sedan - 4Door 5P
View related parts
Kia Optima Spark Plug Assembly
Part Number: 1881711051
$19.48 MSRP: $26.40
You Save: $6.92 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Plug Assembly-Spark
- Manufacturer Note: PFR5N-11
- Replaced by: 2741037100
- 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 Assembly
Part Number: 2741025000
$16.31 MSRP: $23.34
You Save: $7.03 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Plug Assembly-Spark; Spark Plug
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2008 Kia Optima | High Grade, Middle Grade | 2.4L, 2.4L - Theta FF | 4 Door Sedan, Sedan - 4Door 5P
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Kia Optima Spark Plug Assembly
Part Number: 1884011051
$18.47 MSRP: $26.42
You Save: $7.95 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Plug Assembly-Spark; Spark Plug
- Manufacturer Note: IRIDUIM
- Replaces: 274103F100
- 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
View related parts
Kia Optima Spark Plug Assembly
Part Number: 1881811051
$17.81 MSRP: $24.13
You Save: $6.32 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Plug Assembly-Spark
- Manufacturer Note: PGR5C-11(PLATINUM)
- 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

Kia Optima Spark Plug gives the essential spark to ignite the fuel air mixture and awakens the engine in an instant. Each Spark Plug in every Kia sedan uses a steel shell, ceramic insulator, and paired electrodes to send as much as 45,000 volts of electricity creeping across a narrow gap and firing controlled lightning in the cylinders. Over time, a Spark Plug can accumulate carbon soot, oil fouling, glazing, or even gap bridging as deposits pile up, especially if a Kia sees frequent short trips, which rob power and invite pre-ignition. The Optima has applied primarily single ground Spark Plug designs, but some model years have applied multi ground or surface discharge designs that make additional arcs and expose the flame kernel better, increasing service life and improving cold starts. Whichever type lives in the Optima, exact gap size and good heat range are critical to clean combustion. Regular removal, visual reading, and timely replacement keep the Spark Plug pristine, prevent detonation cracking, and allow a Kia Optima to be responsive, economical, and fun to drive.

If you're in search of top-notch, reasonably priced OEM Kia Optima Spark Plug, then you've found the perfect spot. Our website boasts an extensive inventory of Kia Optima Spark Plug, all priced at the market's premier price. Rest assured, every genuine part we offer comes with a warranty straight from the manufacturer.

Kia Optima Spark Plug Parts Questions & Experts Answers

Spark Plug Assembly
1884511160
Q: What should you consider when replacing spark plugs on Kia Optima?
A:
When replacing spark plugs, do not adjust the gap on platinum or iridium plugs, as they are pregapped by the manufacturer and using a gapping tool could damage the electrode plating. A spark plug socket with a rubber grommet is necessary to protect the porcelain insulator and hold the plug during installation. Purchase new plugs and replace them one at a time, inspecting each for defects; any cracks in the porcelain insulator indicate that the plug should not be used. Remove engine covers and disconnect any hoses or components that obstruct access. For V6 engines, the upper intake manifold must be removed to reach the rear plugs. If the plugs have conventional wires, pull them by the boots, while those with coils require disconnecting the coil wiring and unbolting each coil. Use compressed air to clear dirt from the spark plug area before removal. A proper spark plug socket and extension are needed due to the deep recess of the plugs. Compare old plugs with those inside the back cover to assess engine condition, and apply a small amount of anti-seize compound to the threads to prevent damage during future removals. To avoid cross-threading, use a short piece of rubber hose over the plug to help align it with the hole; if cross-threading occurs, the hose will slip, preventing damage. Tighten the plug to the specified torque and securely attach the plug wires before reinstalling any removed components.