How to remove and install Fuel Injector and Fuel Rail on Kia Optima?

We recommend replacing all injector O-rings even when only one injector O-ring or seal is leaking. On most fuel rails, you have to remove the entire assembly anyway, so replace all of the O-rings/seals to avoid having to remove the fuel rail later. First, relieve the fuel pressure. Then, disconnect the cable from the negative battery terminal. Remove the engine cover, if equipped, and the air intake duct. On V6 models, remove the upper intake manifold. Disconnect the electrical connectors from the fuel injectors, unbolt the harness and set the injector harness aside. Remove the fuel rail mounting bolts, the fuel rail and the fuel injectors as a single assembly. Remove the fuel injectors from the fuel rail. If you intend to re-use the same injectors, replace the grommets and O-rings. Installation is the reverse of removal. Be sure to use new injector O-rings and tighten the fuel rail mounting bolts to the torque.

Genuine Kia Optima Fuel Injector

Gas Injector

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11 Fuel Injectors found

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Kia Optima Fuel Injector Assembly
Part Number: 353102G710
$233.45 MSRP: $341.90
You Save: $108.45 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Injector Assembly-Fuel; Injector
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2015 Kia Optima | 2.0L - Theta 2, 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Fuel Injector Assembly
Part Number: 353102GTA1
$112.99 MSRP: $163.05
You Save: $50.06 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Injector Assembly-Fuel; Injector
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2016-2020 Kia Optima | 2.0L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Fuel Injector Assembly
Part Number: 353102GGA1
$124.07 MSRP: $180.60
You Save: $56.53 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Injector Assembly-Fuel; Injector
- 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 Fuel Injector Assembly
Part Number: 353102G720
$365.74 MSRP: $535.65
You Save: $169.91 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Injector Assembly-Fuel; Injector
- 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
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Kia Optima Fuel Injector Assembly
Part Number: 353102G300
$106.85 MSRP: $154.18
You Save: $47.33 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Injector Assembly-Fuel; Injector
- 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 Fuel Injector Assembly
Part Number: 3531023600
$98.88 MSRP: $142.68
You Save: $43.80 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Injector Assembly-Fuel; Injector
- 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 Fuel Injector Assembly
Part Number: 353102B350
$113.12 MSRP: $163.23
You Save: $50.11 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Injector Assembly-Fuel; Injector
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2019-2020 Kia Optima | 1.6L - GAMMA | Sedan - 4Door 5P
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Kia Optima Fuel Injector Assembly
Part Number: 3531037150
$104.68 MSRP: $151.05
You Save: $46.37 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Injector Assembly-Fuel; Injector
- 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 Fuel Injector Assembly
Part Number: 353102B160
$115.21 MSRP: $167.70
You Save: $52.49 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Injector Assembly-Fuel; Injector
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2016-2018 Kia Optima | 1.6L - GAMMA | Sedan - 4Door 5P
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Kia Optima Fuel Injector Assembly
Part Number: 3531038010
$110.40 MSRP: $150.82
You Save: $40.42 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Injector Assembly-Fuel
- Replaced by: 3531038010D
- 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 Fuel Injector Assembly
Part Number: 3531025200
$135.27 MSRP: $196.90
You Save: $61.63 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Injector Assembly-Fuel; Injector
- 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

Kia Optima Fuel Injector

Kia Optima Fuel Injector sprays the right amount of fuel into the engine, replacing carburetors and boosting power and mileage. Recent versions of the Kia have adopted an electronic returnless system that shifts control of the pressure to the pump or engine control module, which has also helped to eliminate the clutter of hoses while maintaining steady pressure to all Fuel Injectors. Guided by the ECU, each Fuel Injector pressurizes gasoline then mists it when the piston drops, providing an ideal air-fuel blend for current load. Over the life of the Optima across the broader Kia lineup, there have been two principal injection methods, indirect manifold injection and later direct injection, and the difference lies in the release location of the Fuel Injector. Indirect systems shoot the spray into the intake manifold for Optima engines to mix the fuel and air before it hits the chamber, whereas direct setups shoot straight into the cylinder for faster response and leaner burn. Though robust, a stuck or clogged Fuel Injector can reduce efficiency or even damage the engine, so it's important that every Kia Optima driver pays attention to the Fuel Injector in a timely manner.

If you're in search of top-notch, reasonably priced OEM Kia Optima Fuel Injector, then you've found the perfect spot. Our website boasts an extensive inventory of Kia Optima Fuel Injector, 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 Fuel Injector Parts Questions & Experts Answers

Fuel Injector Assembly
3531023600
Q: How to remove and install Fuel Injector and Fuel Rail on Kia Optima?
A:
We recommend replacing all injector O-rings even when only one injector O-ring or seal is leaking. On most fuel rails, you have to remove the entire assembly anyway, so replace all of the O-rings/seals to avoid having to remove the fuel rail later. First, relieve the fuel pressure. Then, disconnect the cable from the negative battery terminal. Remove the engine cover, if equipped, and the air intake duct. On V6 models, remove the upper intake manifold. Disconnect the electrical connectors from the fuel injectors, unbolt the harness and set the injector harness aside. Remove the fuel rail mounting bolts, the fuel rail and the fuel injectors as a single assembly. Remove the fuel injectors from the fuel rail. If you intend to re-use the same injectors, replace the grommets and O-rings. Installation is the reverse of removal. Be sure to use new injector O-rings and tighten the fuel rail mounting bolts to the torque.