How do you remove and install a exhaust manifold in a Kia Optima for four cylinder engine?

To remove the manifold, first disconnect the cable from the negative terminal of the battery. Raise the front of the vehicle and support it securely on jackstands, disconnecting the wiring from the oxygen sensor only if it interferes with manifold removal. Apply penetrating oil to the nuts and springs retaining the catalytic converter to the manifold, then remove the nuts and separate the converter from the manifold, taking care not to damage the oxygen sensors. For models from 2006.5 and later, remove the complete front muffler assembly. In the engine compartment, remove the upper heat shield from the manifold, ensuring the upper oxygen sensor is removed for those later models, and unbolt the exhaust manifold brace. Disconnect any other interfering brackets, which may vary by vehicle, and then remove the nuts to detach the manifold and gasket. For installation, use a scraper to clean all old gasket material and carbon deposits from the mating surfaces, checking the manifold for warpage if the gasket shows signs of leaking. Position a new gasket over the cylinder head studs, install the manifold, and thread the mounting nuts into place. Tighten the nuts/bolts from the center out to the specified torque, then reinstall the remaining parts in reverse order. Finally, run the engine and check for exhaust leaks.

Genuine Kia Optima Exhaust Manifold

Engine Exhaust Manifold

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19 Exhaust Manifolds found

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Kia Optima Exhaust Manifold Catalytic Assembly, Right
Part Number: 285103E040
$1018.70 MSRP: $1495.88
You Save: $477.18 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust,Rh; Exhaust Manifold, Manifold
- Position: Passenger Side
- 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
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Kia Optima Exhaust Manifold Catalytic Assembly, Left
Part Number: 285103E830
$1032.03 MSRP: $1515.47
You Save: $483.44 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust,Lh; Exhaust Manifold, Manifold
- Position: Driver Side
- Replaces: 285003E835
- 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
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Kia Optima Exhaust Manifold Catalytic Assembly
Part Number: 285102G240
$1857.37 MSRP: $2727.42
You Save: $870.05 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust; Exhaust Manifold
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2014-2015 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Exhaust Manifold Assembly
Part Number: 285112G710
$237.45 MSRP: $341.75
You Save: $104.30 (31%)
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Product Specifications
- Other Name: Manifold Assembly-Exhaust; Exhaust Manifold
- Replaces: 285112G720
- 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 Exhaust Manifold Catalytic Assembly
Part Number: 285102G190
$3789.10 MSRP: $5564.02
You Save: $1774.92 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust; Exhaust Manifold
- Replaces: 285102G170
- 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 Exhaust Manifold Catalytic Assembly
Part Number: 285102GAV0
$1452.73 MSRP: $2133.24
You Save: $680.51 (32%)
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Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust; Catalytic Converter, Manifold With Converter
- 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 Exhaust Manifold Catalytic Assembly
Part Number: 285102GAS0
$2849.81 MSRP: $4184.75
You Save: $1334.94 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust; Manifold With Converter
- 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 Exhaust Manifold Assembly
Part Number: 285112G010
$190.65 MSRP: $272.75
You Save: $82.10 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold Assembly-Exhaust; Exhaust Manifold
- 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 Exhaust Manifold Catalytic Assembly
Part Number: 285102G400
$763.18 MSRP: $1091.82
You Save: $328.64 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust
- 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 Exhaust Manifold Catalytic Assembly, Right
Part Number: 285103E046
$625.28 MSRP: $918.18
You Save: $292.90 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust,Rh; Exhaust Manifold
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2010 Kia Optima | 2.7L - MU | Sedan - 4Door 5P
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Kia Optima Exhaust Manifold Assembly, Left
Part Number: 2851037371
$728.67 MSRP: $1070.00
You Save: $341.33 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Assembly-Exhaust,Lh; Exhaust Manifold, Manifold
- Position: Driver Side
- 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 Exhaust Manifold Assembly, Right
Part Number: 2851037381
$728.67 MSRP: $1070.00
You Save: $341.33 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Assembly-Exhaust,Rh; Exhaust Manifold, Manifold
- Position: Passenger Side
- 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
View related parts
Kia Optima Exhaust Manifold Catalytic Assembly, Left
Part Number: 285103E836
$875.85 MSRP: $1286.12
You Save: $410.27 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust,Lh; Exhaust Manifold
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2006-2010 Kia Optima | 2.7L - MU | Sedan - 4Door 5P
View related parts
Kia Optima Exhaust Manifold Catalytic Assembly
Part Number: 2851025450
$1608.45 MSRP: $2361.90
You Save: $753.45 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust; Exhaust Manifold
- 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 Exhaust Manifold Assembly
Part Number: 285112G720
$242.98 MSRP: $341.75
You Save: $98.77 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Manifold Assembly-Exhaust
- Replaced by: 285112G710
- 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 Exhaust Manifold Catalytic Assembly
Part Number: 285102G195
$2531.36 MSRP: $3717.12
You Save: $1185.76 (32%)
ADD TO CART
Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust; Exhaust Manifold
- 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
View related parts
Kia Optima Exhaust Manifold Assembly
Part Number: 285112G000
$226.74 MSRP: $324.38
You Save: $97.64 (31%)
Product Specifications
- Other Name: Manifold Assembly-Exhaust; Exhaust Manifold
- 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
View related parts
Kia Optima Exhaust Manifold Catalytic Assembly
Part Number: 285102G245
$1229.14 MSRP: $1804.90
You Save: $575.76 (32%)
Product Specifications
- Other Name: Manifold Catalytic Assembly-Exhaust; Exhaust Manifold
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2014-2015 Kia Optima | 2.4L - Theta 2 | Sedan - 4Door 5P
View related parts
Kia Optima Exhaust Manifold Assembly
Part Number: 2851038250
Product Specifications
- Other Name: Manifold Assembly-Exhaust; Exhaust Manifold
- 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 Exhaust Manifold

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Kia Optima Exhaust Manifold Parts Questions & Experts Answers

Exhaust Manifold Catalytic Assembly, Right
285103E040
Q: How do you remove and install a exhaust manifold in a Kia Optima for four cylinder engine?
A: To remove the manifold, first disconnect the cable from the negative terminal of the battery. Raise the front of the vehicle and support it securely on jackstands, disconnecting the wiring from the oxygen sensor only if it interferes with manifold removal. Apply penetrating oil to the nuts and springs retaining the catalytic converter to the manifold, then remove the nuts and separate the converter from the manifold, taking care not to damage the oxygen sensors. For models from 2006.5 and later, remove the complete front muffler assembly. In the engine compartment, remove the upper heat shield from the manifold, ensuring the upper oxygen sensor is removed for those later models, and unbolt the exhaust manifold brace. Disconnect any other interfering brackets, which may vary by vehicle, and then remove the nuts to detach the manifold and gasket. For installation, use a scraper to clean all old gasket material and carbon deposits from the mating surfaces, checking the manifold for warpage if the gasket shows signs of leaking. Position a new gasket over the cylinder head studs, install the manifold, and thread the mounting nuts into place. Tighten the nuts/bolts from the center out to the specified torque, then reinstall the remaining parts in reverse order. Finally, run the engine and check for exhaust leaks.