Kia Optima Fuel Injector Replacement Costs

Estimate price near me

Service Location

Customer Ratings

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

See availability

Customer Ratings

Fuel Injector Replacement Service

How much does a Fuel Injector Replacement cost?

On average, the cost for a Kia Optima Fuel Injector Replacement is $407 with $267 for parts and $140 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2006 Kia OptimaL4-2.4L	Service typeFuel Injector Replacement	Estimate$705.42	Shop/Dealer Price$843.11 - $1247.27
2006 Kia OptimaV6-2.7L	Service typeFuel Injector Replacement	Estimate$1825.82	Shop/Dealer Price$2202.54 - $3323.24
2010 Kia OptimaL4-2.4L	Service typeFuel Injector Replacement	Estimate$1449.99	Shop/Dealer Price$1774.38 - $2742.97
2013 Kia OptimaL4-2.4L	Service typeFuel Injector Replacement	Estimate$1350.39	Shop/Dealer Price$1649.88 - $2543.76
2002 Kia OptimaL4-2.4L	Service typeFuel Injector Replacement	Estimate$680.91	Shop/Dealer Price$817.97 - $1221.66
2003 Kia OptimaV6-2.7L	Service typeFuel Injector Replacement	Estimate$1723.66	Shop/Dealer Price$2082.13 - $3148.08
2014 Kia OptimaL4-2.0L Turbo	Service typeFuel Injector Replacement	Estimate$1559.73	Shop/Dealer Price$1897.72 - $2905.38
2011 Kia OptimaL4-2.0L Turbo	Service typeFuel Injector Replacement	Estimate$1435.33	Shop/Dealer Price$1742.20 - $2656.54

Show example Kia Optima Fuel Injector Replacement prices

What is a fuel injector and how does it work?

A fuel injector is a fuel metering device that sprays atomized droplets of fuel in a specific pattern into the engine’s intake manifold or directly into the combustion chamber. The injector has a solenoid and valve within and the operation, or pulsing, of the solenoid is controlled by the powertrain control module (PCM). The PCM controls the solenoid’s “on” time in order to keep the air-fuel ratio optimized while the engine load and operating conditions constantly change. Fuel injectors are usually connected to a fuel rail located on the top of the engine and the fuel rail, in turn, is supplied with fuel under pressure from the fuel pump located in the fuel tank.

When to consider replacing a fuel injector:

Rough idle, loss of power, or misfiring. Poor engine operation has many causes but faults in the fuel injection system, including the fuel injectors, are high on the list of possibilities.
Odor of raw gas or visible leaks. Fuel injectors should not leak fuel into the intake manifold when the car is off. If you notice any fuel odor around your car, the possibility of a leaking fuel injector should be considered. There should be no external leak from a fuel injector. If an externally-leaking injector is suspected, do not start your car due to the fire hazard.
Check engine light. Some fuel injection failures, for example, a faulty solenoid, may cause a trouble code to be set in the PCM and that will cause the check engine light to illuminate. The codes are read and the fuel injector is tested directly, as needed.
Major engine repairs, engine replacement, or lengthy storage. All fuel injectors will have deposits given enough mileage. These deposits can cause an imbalance in the performance of the injectors from cylinder to cylinder. When an engine is already disassembled, or if you are installing a new engine, that is a perfect time to service the injectors as a set. All injectors have tiny internal filter baskets. A professional injector service facility will clean each injector ultrasonically and replace these filters for a relatively low cost.

How do mechanics replace a fuel injector?

Injectors can be serviced once removed from the car or replaced outright with new injectors. If the injectors are serviced, specialized cleaning and test equipment are required. The choice to repair versus replace will depend on exactly what is wrong with the injector as well as customer preference. Either option requires removing the injector from the car and the following procedure is typical:

Once the engine is cold, the pressure within the fuel rail is relieved by briefly running the engine with the fuel pump fuse out.
The upper plenum on the intake manifold is removed along with any cables, hoses, or wiring that restricts access.
The supply and return lines are removed from the fuel rail. The electrical connectors to each fuel injector are unlocked and removed. The fuel rail is then unbolted and removed from the intake manifold.
The injector(s) requiring replacement are removed from the fuel rail, taking care to not allow any debris to enter the exposed openings. An O-ring seal usually holds the injector very firmly in a finely polished bore in the fuel rail.
Using a new O-ring, the serviced or replaced injector is re-inserted into the fuel rail — using engine oil on the O-ring to prevent damaging it. O-rings in this application fit very tight to prevent fuel leaks.
The fuel rail is re-installed and the supply and return lines are re-connected. The plenum is re-installed along with all cables, hoses, or wiring.
Finally, the engine is run, there is a careful check for leaks, and the vehicle is road tested.

Is it safe to drive with a fuel injector problem?

Yes, so long as there is no external leak of fuel from a broken or malfunctioning injector, it is safe to drive the car. However, if the injector is known to be malfunctioning, it can cause engine misfires, excessive emissions or, in the case of a badly leaking injector, can overload and overheat the catalytic converter. Additionally, fuel efficiency will always be diminished if the fuel injectors are not working properly.

When replacing a fuel injector keep in mind:

Using high quality (Tier One) gasoline may reduce deposits on fuel injectors and prolong their life.
If an injector problem develops that requires removal of one injector, the best practice is to remove and service all of the injectors at the same time. That service might involve replacement of the electrically failed injector along with off-the-car cleaning of the remaining injectors. Serving all injectors at once ensures the injector set will be balanced, in terms of flow rates, and in turn promote smooth operation of the engine.
Do not use fuel system cleaning compounds, or procedures, unless such materials are specified by the manufacturer of your car.
On the car cleaning of fuel injectors is not as effective as off-the-car cleaning because injectors have tiny internal filter baskets that should be replaced as part of the process of servicing a fuel injector.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee

Meet some of our expert Kia mechanics

Real customer reviews from Kia owners like you.

Excellent Rating

(820)

Rating Summary

778

15

8

2

17

778

15

8

2

17

SEE REVIEWS NEAR ME

Octavio

13 years of experience

77 reviews

Request Octavio

Octavio

13 years of experience

Request Octavio

by Ed

Kia Optima L4-2.4L - Cooling System Flush - Kissimmee, Florida

He was very professional and knew what was needed

Joshua

16 years of experience

33 reviews

Joshua

16 years of experience

by tamera

Kia Optima L4-2.4L - Door Mirror Replacement (Driver Side) - Stone Mountain, Georgia

Very nice and quick job

Dan

40 years of experience

1080 reviews

Dan

40 years of experience

by Nancy

Kia Optima L4-2.4L - Power Steering Return Hose - Gainesville, Georgia

Dan was very good and worked hard to get the job done.

Tien

24 years of experience

903 reviews

Tien

24 years of experience

by Jordan

Kia Optima L4-2.0L Turbo - Battery Light is on - Hayward, California

Great mechanic! Efficient and professional

Excellent Rating

(820)

Rating Summary

778

15

8

2

17

778

15

8

2

17

SEE REVIEWS NEAR ME

Recent articles & questions

4 Essential Things to Know About Your Car’s Fuel Gauge

Few Few things are as frustrating and worrisome as running out of gas. Most people will do their best to make sure that they always have some gas in the tank. However, if there is an issue with the fuel...

P0064 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2, Sensor 3)

P0064 P0064 trouble code definition Indicates that there is an abnormally high voltage or resistance present in the heater control circuit of oxygen sensor (bank 2 sensor 3). The oxygen sensor measurements only become accurate when the sensor reaches a...

Cell Phones and Texting: Distracted Driving Laws in Hawaii

Hawaii Hawaii has strict laws when it comes to distracted driving and using cell phones while driving. Since July of 2013, texting and using a handheld cell phones is against the law for drivers of all ages. Hawaii’s Department of...

I was told by my mechanic I needed to replace the front left wheel bearing over a month ago, how long can I wait to replace it?

Hey there, thanks for writing in about your 2006 Audi A4 Quattro. As the bearing gets noisy, you will notice the noise get louder and you may get to a point of the wheel seizing or wobbling on the highway....

Does a 1994 Cadillac Deville have a crankshaft sensor or do I need to replace the whole distributor?

Hi there. The ignition system for the 4.9L in your vehicle, should be HEI (high energy ignition) and does not have a CKP (crankshaft position sensor). The pick-up coil is inside the distributor and most likely is not the cause...

2004 Lincoln ls v6 my car runs bad when cold until it hits normal temp. The breaks are stiff during the warm up process

To identify the cause of poor operation like that you are describing, the cylinder firing patterns have to be looked at on a scope. That diagnostic reveals whether the issue is fuel or ignition related and also which cylinders are...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (844) 997-3624 · hi@yourmechanic.com