How to replace a thermostat in a cooling system?

Before replacing the thermostat, observe the coolant level, drivebelt tension, and temperature gauge. Also, don't drive without a thermostat as it affects emissions and fuel economy. To replace the thermostat, drain the cooling system, undo the thermostat housing cover, and detach the thermostat. Then, install a new gasket, thermostat, and housing.

Genuine Hyundai Sonata Thermostat

Engine Coolant Thermostat

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18 Thermostats found

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Hyundai Sonata Thermostat Assembly
Part Number: 25500-2GGA0
$35.94 MSRP: $49.13
You Save: $13.19 (27%)

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Product Specifications
- Other Name: Thermostat
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
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Fits the following Vehicles:
- 2015-2019 Hyundai Sonata | DOHC - GDI | Sedan - 4Door 5P
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Hyundai Sonata Thermostat Assembly
Part Number: 25500-23010
$33.23 MSRP: $45.42
You Save: $12.19 (27%)

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Product Specifications
- Other Name: Thermostat
- Manufacturer Note: 82'C
- Replaces: 25500-23001
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
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Fits the following Vehicles:
- 2007-2014 Hyundai Sonata | DOHC - GDI, DOHC - MPI, DOHC - TCI/GDI | Sedan - 4Door 5P
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Hyundai Sonata Thermostat Assembly
Part Number: 25500-2B000
$20.35 MSRP: $26.95
You Save: $6.60 (25%)

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Product Specifications
- Other Name: Thermostat
- Replaces: 25500-2B400
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 2015-2019 Hyundai Sonata | DOHC - TCI/GDI | Sedan - 4Door 5P
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Hyundai Sonata Thermostat Assembly
Part Number: 25500-37200
$29.89 MSRP: $39.58
You Save: $9.69 (25%)

Add to Cart
Product Specifications
- Other Name: Thermostat
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
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Fits the following Vehicles:
- 2001-2005 Hyundai Sonata | High Grade, Middle Grade | 4 Door Sedan
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Hyundai Sonata Thermostat Assembly
Part Number: 25500-25001
$29.89 MSRP: $39.58
You Save: $9.69 (25%)

Add to Cart
Product Specifications
- Other Name: Thermostat
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 2005-2007 Hyundai Sonata | High Grade, Middle Grade | DOHC - MPI | 4 Door Sedan, Sedan - 4Door 5P
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Hyundai Sonata Thermostat Assembly
Part Number: 25500-3C100
$28.07 MSRP: $37.18
You Save: $9.11 (25%)

Add to Cart
Product Specifications
- Other Name: Thermostat
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 2005-2010 Hyundai Sonata | High Grade, Middle Grade | DOHC - MPI | 4 Door Sedan, Sedan - 4Door 5P
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Hyundai Sonata Thermostat Assembly
Part Number: 25500-26100
$23.28 MSRP: $30.82
You Save: $7.54 (25%)

Add to Cart
Product Specifications
- Other Name: Thermostat
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 2009-2014 Hyundai Sonata | DOHC - TCI/GDI | Sedan - 4Door 5P
View related parts
Hyundai Sonata Thermostat Assembly
Part Number: 25500-2GTA0
$24.55 MSRP: $32.52
You Save: $7.97 (25%)

Add to Cart
Product Specifications
- Other Name: Thermostat
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 2015-2019 Hyundai Sonata | DOHC - TCI/GDI | Sedan - 4Door 5P
View related parts
Hyundai Sonata Thermostat Assembly
Part Number: 25500-38001
$24.20 MSRP: $32.05
You Save: $7.85 (25%)

Add to Cart
Product Specifications
- Other Name: Thermostat
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 1998-2005 Hyundai Sonata | High Grade, Middle Grade | 4 Door, 4 Door Sedan
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Hyundai Sonata Thermostat Assembly
Part Number: 25500-35531
$30.23 MSRP: $40.03
You Save: $9.80 (25%)

Add to Cart
Product Specifications
- Other Name: Thermostat
- Replaces: 25500-35530
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 1998-2001 Hyundai Sonata | High Grade, Middle Grade | 4 Door
View related parts
Hyundai Sonata Thermostat Assembly
Part Number: 25500-33060
$22.18 MSRP: $29.37
You Save: $7.19 (25%)

Add to Cart
Product Specifications
- Other Name: Thermostat
- Manufacturer Note: KONGHWA,88'C
- Replaces: 25500-33020, 25500-21220, 25500-11010, 25500-33050, 25500-33040, 25500-21210, 25500-21100
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
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Fits the following Vehicles:
- 1988-1998 Hyundai Sonata | High Grade, Middle Grade | 4 Door
View related parts
Hyundai Sonata Thermostat Assembly
Part Number: 25500-35530
$30.23 MSRP: $40.03
You Save: $9.80 (25%)

Add to Cart
Product Specifications
- Replaced by: 25500-35531
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 1998-2001 Hyundai Sonata | High Grade, Middle Grade | 4 Door
View related parts
Hyundai Sonata Thermostat Assembly
Part Number: 25500-11010
$22.18 MSRP: $29.37
You Save: $7.19 (25%)

Add to Cart
Product Specifications
- Manufacturer Note: 88'C
- Replaced by: 25500-33060
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 1988-1993 Hyundai Sonata | High Grade, Middle Grade | 4 Door
View related parts
Hyundai Sonata Thermostat Assembly
Part Number: 25500-33020
$22.18 MSRP: $29.37
You Save: $7.19 (25%)

Add to Cart
Product Specifications
- Manufacturer Note: 88'C
- Replaced by: 25500-33060
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 1988-1993 Hyundai Sonata | High Grade, Middle Grade | 4 Door
View related parts
Hyundai Sonata Thermostat Assembly
Part Number: 25500-33040
$22.18 MSRP: $29.37
You Save: $7.19 (25%)

Add to Cart
Product Specifications
- Manufacturer Note: 88'C
- Replaced by: 25500-33060
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 1988-1993 Hyundai Sonata | High Grade, Middle Grade | 4 Door
View related parts
Hyundai Sonata Thermostat Assembly
Part Number: 25500-33050
$22.18 MSRP: $29.37
You Save: $7.19 (25%)

Add to Cart
Product Specifications
- Replaced by: 25500-33060
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 1988-1998 Hyundai Sonata | High Grade, Middle Grade | 4 Door
View related parts
Hyundai Sonata Thermostat Assembly
Part Number: 25500-21210
$22.18 MSRP: $29.37
You Save: $7.19 (25%)

Add to Cart
Product Specifications
- Manufacturer Note: 88'C
- Replaced by: 25500-33060
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 1988-1993 Hyundai Sonata | High Grade, Middle Grade | 4 Door
View related parts
Hyundai Sonata Thermostat Assembly
Part Number: 25500-21220
$22.18 MSRP: $29.37
You Save: $7.19 (25%)

Add to Cart
Product Specifications
- Manufacturer Note: 88'C
- Replaced by: 25500-33060
- Warranty: This genuine part is guaranteed by Hyundai's factory warranty.
View More
Fits the following Vehicles:
- 1988-1993 Hyundai Sonata | High Grade, Middle Grade | 4 Door

Hyundai Sonata Thermostat Parts Questions & Answers

Thermostat Assembly
25500-23010
Q: How to replace a thermostat in a cooling system?
A: Before replacing the thermostat, observe the coolant level, drivebelt tension, and temperature gauge. Also, don't drive without a thermostat as it affects emissions and fuel economy. To replace the thermostat, drain the cooling system, undo the thermostat housing cover, and detach the thermostat. Then, install a new gasket, thermostat, and housing.

Related Hyundai Sonata Parts

About Hyundai Sonata Thermostat

Of all the high-precision auto parts within a Hyundai car, the most important one is the Hyundai Sonata Thermostat. Keeping your Sonata Thermostat in top condition is critical to keeping your vehicle running smoothly. By buying a new replacement part, you can save hundreds, even thousands of dollars in costly auto repairs later down the road.