Kia Optima Fuel Injectors
Precision Auto Injectors
Kia Optima Fuel Injectors
Here is every rebuilt genuine Kia injector set we offer for the 2001-2015 Kia Optima, listed by year and engine. Each row shows the part number, so you can check it against the number printed on your injectors.
Find your setKia changed the Optima's 2.4L injector three times between 2001 and 2015, so four of the six sets here are for a 2.4L. Engine size alone won't pick your set. Dirty ones all act alike. The idle gets lumpy or surges at a stop, it stumbles when you get on it, and it goes through more gas. Check the plugs and coils first. If those are good, gummed-up injectors are one of the usual causes. It shows up sooner on an Optima that sits, because gas left in the rail turns to varnish. Varnish cleans off.
Every set we sell starts with genuine OEM injectors, not overseas copies. Each one is ultrasonically cleaned, fitted with new filter baskets, O-rings and seals, flow tested on our ASNU bench, and matched into a set within 2% of each other. Sets ship ready to install.
Find your Optima injector set in three steps
One year can come with two engines. Know both.
It is printed on the injector. Read it where it sits.
Find that number below. Not there? Message us your VIN.
Kia Optima injector chart
We checked every number on this chart against Kia's parts catalog.
| Photo | Years | Engine | Part number | Shop |
|---|---|---|---|---|
 |
2011-2015 | 2.4L Theta II, GDI (direct injection) | 35310-2G710 | Shop 35310-2G710 set of 4 |
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2008-2010 | 2.4L Theta II, not GDI | 35310-2G300, also listed as L042, match your injector | Shop 35310-2G300 set of 4 |
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2006-2010 | 2.7L Mu V6 | 35310-23600, also listed as 9260930013 | Shop 35310-23600 set of 6 |
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2006-2008 | 2.4L Theta | 35310-25200, also listed as L021, match your injector | Shop 35310-25200 set of 4 |
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2001-2005 | 2.4L | 35310-38010, also listed as 9260930003 | Shop 35310-38010 set of 4 |
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2001-2005 | 2.5L or 2.7L V6 | 35310-37150, also listed as 9260930004 | Shop 35310-37150 set of 6 |
Not on the chart: the 2011-2015 2.0L turbo. Kia's catalog shows 35310-2G720 for the 2.0L. It's rebuilt to order, so message us with your VIN. From 2016 on Kia changed the Optima's injectors again (the 2.4L went to 35310-2GGA1). For a 2016 or newer car, or any Optima Hybrid, send us the number on your injector and your VIN.
Not sure which set fits your Optima?
Match the part number. The fastest way to be sure is to read the number printed on one of your injectors and match it to the listing. If your number isn't on this page, send it to us. We'll find the right set, or tell you straight if we don't have it.
Every Optima number here starts with 35310. The part after the dash tells the sets apart. Read it right on the engine, with a flashlight and a phone picture. If it's tucked where you can't see it, leave it alone. Message us your VIN instead, or call (407) 536-4509. We're in Sanford, Florida.
2011-2015 Optima 2.4L GDI: 35310-2G710
GDI is gasoline direct injection: the injector sprays straight into the cylinder, not the intake. The Optima 2.4L went to it for 2011, and the number became Kia 35310-2G710. Our listing names the LX and EX for all five years and the SX for 2014 and 2015 only. It's listed for the 2.4L only. The same set is used on the Kia Sorento, Kia Sportage and Hyundai Sonata in certain years.
Shop rebuilt Kia 35310-2G710 set of 4 for 2011-2015 Optima 2.4L GDI
2008-2010 Optima 2.4L: 35310-2G300
Kia's catalog gives 35310-2G300 for the 2008-2010 Optima 2.4L, the last one before direct injection. It's also listed as L042. Our listing for this set doesn't spell out the Optima, so match the number on yours before you order. The catalog also lists it for the Kia Forte, Rondo, Sorento and Sportage 2.4L in certain years.
2008 is the year to watch. The catalog shows two numbers on 2008 cars, and they aren't the same injector. If yours read 35310-2G300 or L042, this is your set. If they read 35310-25200 or L021, it's the 2006-2008 set below. The catalog also puts 35310-2G300 on the 2011-2013 Optima Hybrid. Send us your VIN first on a Hybrid, since our listing doesn't name it.
Shop rebuilt Kia 35310-2G300 set of 4 for 2008-2010 Optima 2.4L
2006-2010 Optima 2.7L V6: 35310-23600
From 2006 the Optima V6 takes Kia 35310-23600, also listed as 9260930013. It's not the injector the 2001-2005 V6 used. Count before you order: this is the set of six. We sell the same number as a set of four for a 2.0L four-cylinder, and that one isn't yours. The listing calls out a stumble under load, a surging idle at stops and lean codes. The same set is used on the Hyundai Sonata 2.7L and the Kia Rondo 2.7L.
Shop rebuilt Kia 35310-23600 set of 6 for 2006-2010 Optima 2.7L V6
2006-2008 Optima 2.4L: 35310-25200
The 2.4L injector changed for 2006, and Kia's catalog gives 35310-25200 for 2006 through 2008. The listing adds L021, the Kefico mark, and either one may be on yours. Kia used more than one injector on its 2.4L engines, so the listing says year and engine size aren't enough. Order this set only if yours read 35310-25200 or L021. The same set is used on the Kia Rondo 2.4L and the Hyundai Sonata 2.4L in certain years.
Shop rebuilt Kia 35310-25200 set of 4 for 2006-2008 Optima 2.4L
2001-2005 Optima 2.4L: 35310-38010
The first Optima 2.4L takes Kia 35310-38010, also listed as 9260930003. Kia's catalog shows 35310-38010D as its replacement, so yours may read either. This is the set of four. We sell the same number as a set of six for a 3.5L V6, so check the count. Our listing runs to 2006, but the catalog stops this number at 2005. If your 2006 reads 35310-38010, send us your VIN before you order. The listing puts the same set on the Hyundai Sonata 2.4L of those years.
Shop rebuilt Kia 35310-38010 set of 4 for 2001-2005 Optima 2.4L
2001-2005 Optima V6: 35310-37150
The first Optima V6, both the 2.5L and the 2.7L, takes Kia 35310-37150, also listed as 9260930004. Kia's catalog lists this number for every V6 Optima from 2001 through 2005. This is the set of six. We sell the same number as a set of four for a four-cylinder, so count before you order. It's a different injector from the 35310-23600 the V6 moved to in 2006. The same set fits the Hyundai Sonata V6 of those years.
Shop rebuilt Kia 35310-37150 set of 6 for 2001-2005 Optima V6
Signs your Optima needs injectors
- A lumpy or surging idle at a stop that evens out once you're rolling
- A stumble when you get on the gas, climbing a ramp with the A/C on
- A lean code such as P0171 with no vacuum leak to explain it
- A misfire code that stays on one cylinder after you move the coil and plug. A compression test rules out the engine before you blame the injector.
- Filling up more often with nothing else changed
The leaking fuel injector symptoms guide has the checks to run before you order. A flashing check engine light is a hard misfire. Park it until it's fixed.
Common questions
Will a bottle of injector cleaner fix it?
It may help a mildly dirty set, over a few tanks. It won't free a stuck injector, and it can't tell you whether they all flow the same. That takes a bench. Want to keep your own injectors? Our fuel injector cleaning service does that.
Why a matched set instead of one injector?
On a four-cylinder Optima, one injector is a quarter of the engine. Drop one clean injector in with three dirty ones and they still don't flow alike, so it may not idle any better. A matched set gives every cylinder the same gas.
Do I send my old injectors back?
Your old set is called the core. Some sets carry a core refund when you send it back, and some don't. The listing tells you which. The core refund page spells out the rules.