How to replace a thermostat in a Nissan Altima?

Drain the cooling system and save the coolant if it's in good condition. Remove the fresh air intake duct, lower radiator hose, and air filter housing. Disconnect hoses from the coolant outlet and heater pipe, installing a new O-ring on the heater pipe end. Remove the housing cover, tap it loose if stuck, and clean mating surfaces. Remove the thermostat or water control valve, install a new sealing ring, and insert the valve into the housing with the air bleed facing up for the thermostat. Apply RTV sealant for the thermostat cover or use a new gasket for the water control valve. Tighten bolts evenly, then refill the cooling system. For V6 engines, remove the water pump drain plug and coolant reservoir, disconnect the IVT valve connector, and the lower radiator hose. Remove the thermostat housing/thermostat assembly and replace it if the thermostat is defective. Install everything in reverse, position the jiggle valve correctly, refill the cooling system, start the engine, and check for leaks and proper thermostat operation.

Genuine Nissan Altima Thermostat

Engine Coolant Thermostat

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12 Thermostats found

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Nissan Altima Thermostat Assembly
Part Number: 21200-EA000
$25.10 MSRP: $39.62
You Save: $14.52 (37%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat Assy; Thermostat
- Manufacturer Note: OPEN TEMP=82+-1.5
- Replaces: 21200-6N210
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2002-2018 Nissan Altima | 25SL/Moon Roof, Base, Entry, Hybrid, S, S PDS, SL, SR, SV, SV Navigation, Tech | 4 Cyl 2.5L | QR25DE
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Nissan Altima Thermostat Assembly
Part Number: 21200-9HP0A
$28.32 MSRP: $41.77
You Save: $13.45 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy; Thermostat, Thermostat Unit
- Replaces: 21200-JA10A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2007-2018 Nissan Altima | S, SE, SL, SR, SV, Tech | 6 Cyl 3.5L | VQ35DE
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Nissan Altima Thermostat Assembly
Part Number: 21200-53J00
$26.26 MSRP: $40.20
You Save: $13.94 (35%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-0C82A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1993-2001 Nissan Altima | GLE, GXE, SE, XE | 4 Cyl 2.4L | KA24DE
View related parts
Nissan Altima Thermostat Assembly
Part Number: 21200-6N210
$25.10 MSRP: $39.62
You Save: $14.52 (37%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-EA000
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2002-2016 Nissan Altima | 25SL/Moon Roof, Base, Entry, Hybrid, S, S PDS, SL, SV, SV Navigation, Tech | 4 Cyl 2.5L | QR25DE
View related parts
Nissan Altima Thermostat Assembly
Part Number: 21200-ED00A
$24.08 MSRP: $35.52
You Save: $11.44 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy; Thermostat
- Replaces: 21200-ED000
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2019-2024 Nissan Altima | Platinum, S, SL, SR, SV | 4 Cyl 2.5 L GAS, 4 Cyl 2.5L | PR25DD
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Nissan Altima Engine Coolant Thermostat Housing
Part Number: 21200-JA10A
$28.32 MSRP: $41.77
You Save: $13.45 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-9HP0A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2007-2015 Nissan Altima | S, SE, SL, SR, SV, Tech | 6 Cyl 3.5L | VQ35DE
View related parts
Nissan Altima Thermostat Assembly
Part Number: 21200-8J100
$28.22 MSRP: $43.18
You Save: $14.96 (35%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-8J10B
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2002-2006 Nissan Altima | SE, SE-R, SL | 6 Cyl 3.5L | VQ35DE
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Nissan Altima Thermostat Assembly
Part Number: 21200-40F00
$26.26 MSRP: $40.20
You Save: $13.94 (35%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Manufacturer Note: 76.5C
- Replaced by: 21200-0C82A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1993 Nissan Altima | GLE, GXE, SE, XE | 4 Cyl 2.4L | KA24DE
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Nissan Altima Sensor Assy-Thermister
Part Number: 27723-8J000
$39.80 MSRP: $53.07
You Save: $13.27 (25%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assy-Intake; Thermostat Amplifier, Thermostatic Switch
- Replaces: 27732-8J000
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2002-2006 Nissan Altima | Base, S, SE, SE-R, SL | 4 Cyl 2.5L, 6 Cyl 3.5L | QR25DE, VQ35DE
View related parts
Nissan Altima Thermostat Assembly
Part Number: 21200-0C810
$26.26 MSRP: $40.20
You Save: $13.94 (35%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Manufacturer Note: NIHON THERMOSTAT
- Replaced by: 21200-0C82A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1994-1997 Nissan Altima | GLE, GXE, SE, XE | 4 Cyl 2.4L | KA24DE
View related parts
Nissan Altima Thermostat Assembly
Part Number: 21200-53J10
$26.26 MSRP: $40.20
You Save: $13.94 (35%)
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaced by: 21200-0C82A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 1993-1995 Nissan Altima | GLE, GXE, SE, XE | 4 Cyl 2.4L | KA24DE
View related parts
Nissan Altima Thermostat Assembly
Part Number: 21200-6CA0A
$69.63 MSRP: $92.83
You Save: $23.20 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assy
- Replaces: 21200-9HE0A
- Warranty: This genuine part is guaranteed by Nissan's factory warranty.
Fits the following Vehicles:
- 2019 Nissan Altima | Platinum, S , SL , SR, SV | 4 Cyl 2.5L | PR25DD

Nissan Altima Thermostat

The Nissan Altima Thermostat is installed part in the Nissan vehicle which is near to the radiator used in the cooling system of the vehicle. Majority of them are used in refrigeration and air conditioning, keeping the engine at the right temperature for efficiency. Due to the flow rate control of the cooling system's liquids, the Thermostat ensures the non-expansion of the engine part's which may be caused by heat malfunctions. Moreover, it influences the correct kinematic viscosity of the oil, necessary for efficient lubrication and reduction of rubbing and abrasive wear. Broken Thermistors lead to ineffective coolants, so the engine becomes hot. There are several kinds of thermostats including mechanical, the key which utilizes bimetallic strip, wax pellet, and others have been installed in the Altima models as a means to warm or cool the car within the required temperatures for better utilization and comfort.

If you need any OEM Nissan Altima Thermostat, feel free to choose them out of our huge selection of genuine Nissan Altima Thermostat. All our parts are offered at unbeatable prices and are supported by the manufacturer's warranty. In addition, we offer quick shipping to have your parts delivered to your door step in a matter of days.

Nissan Altima Thermostat Parts Questions & Experts Answers

Thermostat Assembly
21200-6N210
Q: How to replace a thermostat in a Nissan Altima?
A: Drain the cooling system and save the coolant if it's in good condition. Remove the fresh air intake duct, lower radiator hose, and air filter housing. Disconnect hoses from the coolant outlet and heater pipe, installing a new O-ring on the heater pipe end. Remove the housing cover, tap it loose if stuck, and clean mating surfaces. Remove the thermostat or water control valve, install a new sealing ring, and insert the valve into the housing with the air bleed facing up for the thermostat. Apply RTV sealant for the thermostat cover or use a new gasket for the water control valve. Tighten bolts evenly, then refill the cooling system. For V6 engines, remove the water pump drain plug and Coolant Reservoir, disconnect the IVT valve connector, and the lower radiator hose. Remove the thermostat housing/thermostat assembly and replace it if the thermostat is defective. Install everything in reverse, position the jiggle valve correctly, refill the cooling system, start the engine, and check for leaks and proper thermostat operation.