How to remove the radiator and Coolant Reservoir on Kia Optima?

First, disconnect the minus battery cable before taking off the radiator, remove any engine splash shields or covers and break off connection of any wiring to the fan motor(s). Get rid of the coolant and remove air inlet duct for 2006.5 and later models. Mark their positions and detach upper and lower radiator hoses together with reservoir hose. Disconnect transaxle oil cooler hoses on automating vehicles, cap fittings to prevent leakage. Then follow up by unbolting radiator top mounting brackets and carefully removing the radiator and fan (s) as an assembly. Thereafter, one should remove cooling fans from radiators. Find out if there are leaks in radiators or if they have been damaged at all or if their channels are blocked. Use compressed air with a brush that is not harshly bristled, to clean bugs and dirt from it but take care not to curve its cooling fins when cleaning them out .Do not forget that while fitting ensure rubber mounts are correctly placed before filling the cooling system with right mixture of antifreeze and water; then start it allow it run so that you can see whether there are leakages in order to monitor how much of coolant gets lost at a time too.To be more sure make sure you check auto trans fluid too.Put your hand around this reservoir hose connecting it towards the radiator; soon after pinch it firmly just before disconnecting that same hose.However in case of 2001 thru 2006 models after pinching off this hose connecting it between this container as well as radiator you will require removing even cells plus tray.Discover where its mounting fasteners are placed thereby lift out its reservoir which also needs inspection for damage.Installation requires reversing removal steps by refilling it back till lower level line.

Genuine Kia Optima Radiator

Cooling Radiator

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18 Radiators found

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Kia Optima Radiator Assembly
Part Number: 253103R501
$404.94 MSRP: $569.54
You Save: $164.60 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Replaced by: 253103S651
- 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 Radiator Assembly
Part Number: 253103S700
$376.52 MSRP: $529.57
You Save: $153.05 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Replaced by: 253103S750
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2014-2015 Kia Optima | 2.0L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Radiator Assembly
Part Number: 25310C1150
$385.77 MSRP: $564.99
You Save: $179.22 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Radiator
- 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 Radiator Assembly
Part Number: 253103S000
$360.31 MSRP: $506.77
You Save: $146.46 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 253103S051
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2013 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
View related parts
Kia Optima Radiator Assembly
Part Number: 253103Q600
$376.52 MSRP: $529.57
You Save: $153.05 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 253103S750
- 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 Radiator Assembly
Part Number: 25310C1250
$385.77 MSRP: $564.99
You Save: $179.22 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Radiator
- 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
View related parts
Kia Optima Radiator Assembly
Part Number: 253103R500
$404.94 MSRP: $569.54
You Save: $164.60 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 253103S651
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2013 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Radiator Assembly
Part Number: 253103L290
$428.53 MSRP: $627.60
You Save: $199.07 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Radiator
- Replaces: 253103K280
- 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 Radiator Assembly
Part Number: 253103K180
$360.10 MSRP: $506.47
You Save: $146.37 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Replaced by: 253103K190
- 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 Radiator Assembly
Part Number: 253103K190
$345.82 MSRP: $506.47
You Save: $160.65 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Radiator
- Replaces: 253103K180
- 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 Radiator Assembly
Part Number: 253103K080
$360.31 MSRP: $506.77
You Save: $146.46 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 253103K090
- 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
View related parts
Kia Optima Radiator Assembly
Part Number: 253103Q500
$404.71 MSRP: $592.72
You Save: $188.01 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Radiator
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2013 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
View related parts
Kia Optima Radiator Assembly
Part Number: 25310D5200
$408.70 MSRP: $598.57
You Save: $189.87 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Radiator
- 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
View related parts
Kia Optima Radiator Assembly
Part Number: 253103K280
$446.22 MSRP: $627.60
You Save: $181.38 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 253103L290
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2008 Kia Optima | High Grade, Middle Grade | 2.7L, 2.7L - MU | 4 Door Sedan, Sedan - 4Door 5P
View related parts
Kia Optima Radiator Assembly
Part Number: 253103K290
$434.95 MSRP: $637.02
You Save: $202.07 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Radiator
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2010 Kia Optima | 2.4L - Theta 2, 2.4L - Theta FF | Sedan - 4Door 5P
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Kia Optima Radiator Assembly
Part Number: 2531038001
$332.00 MSRP: $466.95
You Save: $134.95 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 2531038005
- 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
View related parts
Kia Optima Radiator Assembly
Part Number: 253103K090
$346.02 MSRP: $506.77
You Save: $160.75 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Radiator
- Replaces: 253103K080
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2010 Kia Optima | High Grade, Middle Grade | 2.4L, 2.4L - Theta 2, 2.4L - Theta FF | 4 Door Sedan, Sedan - 4Door 5P
View related parts
Kia Optima Radiator Assembly
Part Number: 2531038050
$402.37 MSRP: $565.92
You Save: $163.55 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 2531038055
- 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, 2.5L, 2.7L | 4 Door Sedan

Kia Optima Radiator

The Kia Optima Radiator is located at the front of the car and functions as the primary heat exchanger that allows hot coolant to dump heat from the engine into moving air. Coolant from the Optima engine flows through tight tubes while thin metal fins absorb the heat and transfer it to the breeze that blows through the grille, and the faster the fins operate, the cooler the motor remains. Across the years, Kia applied primarily aluminum-core Radiator designs with plastic or aluminum side tanks since aluminum sheds heat quickly and is lightweight, although some of the early designs were made using copper or brass, which were heavier but easier to repair. No matter the material, the same layout of inlet tank, core, and outlet tank is maintained in each Radiator, and the same constant airflow is relied upon with the help of the Optima fan or the motion of the car. Leaks are a common failure, and while small holes can be soldered, a fresh Radiator will give full cooling performance and also protect the Kia powerplant against overheating. This reliable Radiator continues to be part and parcel of every Kia Optima produced.

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

Radiator Assembly
253103K090
Q: How to remove the radiator and Coolant Reservoir on Kia Optima?
A:
First, disconnect the minus battery cable before taking off the radiator, remove any engine splash shields or covers and break off connection of any wiring to the fan motor(s). Get rid of the coolant and remove air inlet duct for 2006.5 and later models. Mark their positions and detach upper and lower radiator hoses together with reservoir hose. Disconnect transaxle oil cooler hoses on automating vehicles, cap fittings to prevent leakage. Then follow up by unbolting radiator top mounting brackets and carefully removing the radiator and fan (s) as an assembly. Thereafter, one should remove cooling fans from radiators. Find out if there are leaks in radiators or if they have been damaged at all or if their channels are blocked. Use compressed air with a brush that is not harshly bristled, to clean bugs and dirt from it but take care not to curve its cooling fins when cleaning them out .Do not forget that while fitting ensure rubber mounts are correctly placed before filling the cooling system with right mixture of antifreeze and water; then start it allow it run so that you can see whether there are leakages in order to monitor how much of coolant gets lost at a time too.To be more sure make sure you check auto trans fluid too.Put your hand around this reservoir hose connecting it towards the radiator; soon after pinch it firmly just before disconnecting that same hose.However in case of 2001 thru 2006 models after pinching off this hose connecting it between this container as well as radiator you will require removing even cells plus tray.Discover where its mounting fasteners are placed thereby lift out its reservoir which also needs inspection for damage.Installation requires reversing removal steps by refilling it back till lower level line.