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Replacement and OEM Parts for Thermostat
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  • OEM (Genuine) Thermostat Assembly (Nippon Thermostat)

    PartNumber: 19301-P8E-A10
    OEM Thermostat Assembly (Nippon Thermostat) - 19301-P8E-A10
    Product Specifications
    • Other Names: Thermostat
    • Item Dimensions: 2.9 x 2.9 x 2.6 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 19301-PR7-305, 19300-PR7-A02, 19301-PR7-A00, 19301-PR7-A01, 19300-PR7-A01, 19301-PR7-306, 19301-PR7-307
    • Part Description: Thermostat Assembly (Nippon Thermostat)
    More Info
    $62.28 MSRP: $87.99
    You Save: $25.71 (30%)
  • AISIN Engine Coolant Thermostat - THT-019

    AISIN® Engine Coolant Thermostat

    PartNumber: THT-019
    Product Specifications
    • Part Description: Engine Coolant Thermostat
    $18.19
  • VEMO Engine Coolant Thermostat with Housing and Seal - V30-99-0197

    VEMO® Engine Coolant Thermostat with Housing and Seal

    PartNumber: V30-99-0197
    Product Specifications
    • Height [mm]: 105
    • Housing Type: Synthetic Material Housing
    • Length [mm]: 165
    • Opening Temperature [°C]: 97
    • Supplementary Article/Info 2: with sensor
    • Supplementary Article/Supplementary Info: with seal
    • Weight [kg]: 0.465
    • Width [mm]: 120
    • Part Description: Engine Coolant Thermostat with Housing and Seal
    More Info
    $142.48
  • facet Engine Coolant Thermostat with Gasket, Wiring Harness, Housing and Thermostat - 7.8927K

    facet® Engine Coolant Thermostat with Gasket, Wiring Harness, Housing and Thermostat

    PartNumber: 7.8927K
    Product Specifications
    • Part Description: Engine Coolant Thermostat with Gasket, Wiring Harness, Housing and Thermostat
    $88.80
  • STANT OE Exact Engine Coolant Thermostat - 48829

    STANT® OE Exact Engine Coolant Thermostat

    PartNumber: 48829
    Product Specifications
    • Flange Diameter (Without Seal): 1.87"
    • Height from Flange to Bottom: 1.97"
    • Height from Flange to Top of Bridge: 0.9"
    • OE Part Number: A2712000015, A2712030575, A2712030375
    • Temperature (F): 194 Degrees
    • UPC: 033342086500
    • Part Description: OE Exact Engine Coolant Thermostat
    More Info
    $35.22
  • OEM (Genuine) Thermostat Assembly (Nippon Thermostat)

    PartNumber: 19301-PAA-306
    OEM Thermostat Assembly (Nippon Thermostat) - 19301-PAA-306
    Product Specifications
    • Other Names: Thermostat
    • Item Dimensions: 6.1 x 5.3 x 2.1 inches
    • Item Weight: 0.50 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 19301-PAA-305, 19301-P08-306, 19300-PH7-004, 19300-PH7-024, 19300-PT0-003, 19300-PL2-004, 19300-P08-014, 19301-P08-315, 19300-PR3-004, 19300-P08-003, 19300-PR3-003, 19301-P08-316, 19301-P08-305, 19301-P10-307, 19300-PT0-004, 19301-P08-000, 19300-PH7-014
    • Part Description: Thermostat Assembly (Nippon Thermostat)
    More Info
    $36.29 MSRP: $51.27
    You Save: $14.98 (30%)
  • Gates OE Type Engine Coolant Thermostat - 34814

    Gates® OE Type Engine Coolant Thermostat

    PartNumber: 34814
    Product Specifications
    • Depth from Flange: 0.75"
    • Design: Reverse Poppet
    • Flange Diameter: 1.8"
    • Height from Flange: 0.7"
    • Includes Installation Tool: No
    • Jiggle Pin/Check Valve: Yes
    • Material: Steel, Copper
    • Number of Gaskets: 0
    • Number of Jiggle Pins/Check Valves: 1
    • Number of Seals: 1
    • OE Comparison Rating: OE Performance
    • Seal Type: O-Ring
    • Temperature (C): 91
    • Temperature (F): 195
    • Total Height: 1.45"
    • Type: OE Type Thermostat
    • UPC: 770075686309
    • Part Description: OE Type Engine Coolant Thermostat
    More Info
    $45.05
  • VEMO Engine Coolant Thermostat Assembly - V30-99-0198

    VEMO® Engine Coolant Thermostat Assembly

    PartNumber: V30-99-0198
    Product Specifications
    • Height [mm]: 123
    • Housing Type: with housing
    • Length [mm]: 205
    • Opening Temperature [°C]: 95
    • Packaging Depth [cm]: 11,6
    • Packaging height [cm]: 17,7
    • Packaging width [cm]: 20,7
    • Supplementary Article/Info 2: with sensor
    • Supplementary Article/Supplementary Info: with seal
    • Weight [kg]: 0,317
    • Width [mm]: 177
    • Part Description: Engine Coolant Thermostat Assembly
    More Info
    $103.88
  • facet Engine Coolant Thermostat - 7.8738

    facet® Engine Coolant Thermostat

    PartNumber: 7.8738
    Product Specifications
    • Part Description: Engine Coolant Thermostat
    $46.05
  • STANT Engine Coolant Thermostat - 48759

    STANT® Engine Coolant Thermostat

    PartNumber: 48759
    Product Specifications
    • Bypass Plate Diameter: 1.18"
    • Flange Diameter (With Seal): 1.6"
    • Flange Diameter (Without Seal): 1.83"
    • Height from Flange to Bottom: 1.06"
    • Height from Flange to Top of Bridge: 0.93"
    • OE Part Number: 5958079, 24420652, 55353492, 4503017, 4623815, 30553038, 22687712, 90502201, 11097431, 24420653, 30563202, 09120455
    • Temperature (F): 198 Degrees
    • UPC: 033342086401
    • Part Description: Engine Coolant Thermostat
    More Info
    $27.90
  • OEM (Genuine) Thermostat Assembly (Fuji Seiko)

    PartNumber: 19301-RNA-315
    OEM Thermostat Assembly (Fuji Seiko) - 19301-RNA-315
    Product Specifications
    • Other Names: Thermostat
    • Item Dimensions: 5.9 x 3.7 x 2.0 inches
    • Item Weight: 0.50 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 19301-RNA-306, 19301-RNA-305
    • Part Description: Thermostat Assembly (Fuji Seiko)
    More Info
    $48.51 MSRP: $68.53
    You Save: $20.02 (30%)
  • Gates OE Type Engine Coolant Thermostat - 34800

    Gates® OE Type Engine Coolant Thermostat

    PartNumber: 34800
    Product Specifications
    • Depth from Flange: 0.98"
    • Design: Reverse Poppet
    • Flange Diameter: 2.63"
    • Height from Flange: 0.88"
    • Includes Installation Tool: No
    • Jiggle Pin/Check Valve: Yes
    • Material: Steel, Copper
    • Number of Gaskets: 0
    • Number of Jiggle Pins/Check Valves: 1
    • Number of Seals: 2
    • OE Comparison Rating: OE Performance
    • Seal Type: O-Ring
    • Temperature (C): 80
    • Temperature (F): 176
    • Total Height: 1.87"
    • Type: OE Type Thermostat
    • UPC: 770075686163
    • Part Description: OE Type Engine Coolant Thermostat
    More Info
    $42.55
  • VEMO Engine Coolant Thermostat with Gasket - V20-99-1258-1

    VEMO® Engine Coolant Thermostat with Gasket

    PartNumber: V20-99-1258-1
    Product Specifications
    • Number of Poles: 2
    • Opening Temperature [°C]: 97
    • Part Description: Engine Coolant Thermostat with Gasket
    More Info
    $89.12
  • facet Engine Coolant Thermostat - 7.8758

    facet® Engine Coolant Thermostat

    PartNumber: 7.8758
    Product Specifications
    • Part Description: Engine Coolant Thermostat
    $44.53
  • OEM (Genuine) Water Inlet

    PartNumber: 90916-A3003
    OEM Water Inlet - 90916-A3003
    Product Specifications
    • Other Names: Water Inlet
    • Item Dimensions: 2.3 x 0.9 x 1.9 inches
    • Item Weight: 1.30 Pounds
    • Replaces: 90916-03129, 90916-03084
    • Part Description: Water Inlet
    More Info
    $21.27 MSRP: $30.63
    You Save: $9.36 (31%)
  • Gates Premium Engine Coolant Thermostat - 34025S

    Gates® Premium Engine Coolant Thermostat

    PartNumber: 34025S
    Product Specifications
    • Design: Reverse Poppet
    • Height: 1.92
    • Height Between Flanges: 1.18
    • Height from Flange: .74
    • Includes Installation Tool: No
    • Jiggle Pin Weep Hole: No
    • Material: Stainless Steel, Copper
    • Number of Gaskets: 0
    • Number of Jiggle Pins/Check Valves: 0
    • Number of Seals: 0
    • Sealing Flange Outside Diameter: 2.13
    • Start to Open Temperature: 180; 82
    • UPC: 770075753322
    • Part Description: Premium Engine Coolant Thermostat
    More Info
    $38.65
  • VEMO Engine Coolant Thermostat Assembly - V20-99-1294

    VEMO® Engine Coolant Thermostat Assembly

    PartNumber: V20-99-1294
    Product Specifications
    • Height [mm]: 90
    • Housing Type: Synthetic Material Housing
    • Length [mm]: 150
    • Opening Temperature [°C]: 108
    • Packaging Depth [cm]: 13,4
    • Packaging height [cm]: 12,1
    • Packaging width [cm]: 14,1
    • Supplementary Article/Supplementary Info: without gasket / seal
    • Weight [kg]: 0,273
    • Width [mm]: 130
    • Part Description: Engine Coolant Thermostat Assembly
    More Info
    $81.59
  • facet Engine Coolant Thermostat - 7.8756

    facet® Engine Coolant Thermostat

    PartNumber: 7.8756
    Product Specifications
    • Part Description: Engine Coolant Thermostat
    $34.57
  • OEM (Genuine) Thermostat Assembly (Nippon Thermostat)

    PartNumber: 19301-RAF-004
    OEM Thermostat Assembly (Nippon Thermostat) - 19301-RAF-004
    Product Specifications
    • Other Names: Thermostat, Thermostat Unit
    • Item Dimensions: 4.6 x 3.7 x 2.8 inches
    • Item Weight: 0.80 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 19301-RAF-003
    • Part Description: Thermostat Assembly (Nippon Thermostat)
    More Info
    $79.51 MSRP: $112.32
    You Save: $32.81 (30%)
  • VEMO Engine Coolant Thermostat with Housing and Gasket - V15-99-2067

    VEMO® Engine Coolant Thermostat with Housing and Gasket

    PartNumber: V15-99-2067
    Product Specifications
    • Closing temperature [°C]: 88
    • Height [mm]: 69
    • Length [mm]: 180
    • Opening Temperature [°C]: 88
    • Packaging Depth [cm]: 9,8
    • Packaging height [cm]: 10,6
    • Packaging width [cm]: 25,9
    • Weight [kg]: 0,265
    • Width [mm]: 75
    • Part Description: Engine Coolant Thermostat with Housing and Gasket
    More Info
    $63.03
  • facet Engine Coolant Thermostat - 7.8770

    facet® Engine Coolant Thermostat

    PartNumber: 7.8770
    Product Specifications
    • Part Description: Engine Coolant Thermostat
    $34.57
  • OEM (Genuine) Thermostat

    PartNumber: 90916-03100
    OEM Thermostat - 90916-03100
    Product Specifications
    • Item Dimensions: 2.6 x 2.6 x 2.5 inches
    • Item Weight: 1.20 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Thermostat
    More Info
    $23.31 MSRP: $33.58
    You Save: $10.27 (31%)
  • Gates Premium Engine Coolant Thermostat - 34016S

    Gates® Premium Engine Coolant Thermostat

    PartNumber: 34016S
    Product Specifications
    • By-Pass Flange Diameter: 1.38
    • Design: Bottom By-Pass
    • Height: 2.22
    • Height Between Flanges: 1.4
    • Height from Flange: .82
    • Includes Installation Tool: No
    • Jiggle Pin Weep Hole: No
    • Material: Stainless Steel, Copper
    • Number of Gaskets: 0
    • Number of Jiggle Pins/Check Valves: 0
    • Number of Seals: 2
    • Seal Type: O-Ring
    • Sealing Flange Outside Diameter: 2.12
    • Start to Open Temperature: 188; 87
    • UPC: 770075745457
    • Part Description: Premium Engine Coolant Thermostat
    More Info
    $35.82
  • VEMO Engine Coolant Thermostat with Housing and Gasket - V15-99-2081

    VEMO® Engine Coolant Thermostat with Housing and Gasket

    PartNumber: V15-99-2081
    Product Specifications
    • Height [mm]: 85
    • Housing Type: with housing
    • Length [mm]: 155
    • Opening Temperature [°C]: 85
    • Packaging Depth [cm]: 11,1
    • Packaging height [cm]: 14,2
    • Packaging width [cm]: 22,1
    • Supplementary Article/Supplementary Info: with seal
    • Weight [kg]: 0,226
    • Width [mm]: 109
    • Part Description: Engine Coolant Thermostat with Housing and Gasket
    More Info
    $63.04
  • facet Engine Coolant Thermostat - 7.8427

    facet® Engine Coolant Thermostat

    PartNumber: 7.8427
    Product Specifications
    • Part Description: Engine Coolant Thermostat
    $32.66
  • OEM (Genuine) Thermostat Assembly

    PartNumber: 19301-PNA-003
    OEM Thermostat Assembly - 19301-PNA-003
    Product Specifications
    • Other Names: Thermostat
    • Item Dimensions: 4.6 x 4.1 x 3.7 inches
    • Item Weight: 0.70 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Thermostat Assembly
    More Info
    $81.40 MSRP: $114.50
    You Save: $33.10 (29%)
  • Gates Premium Engine Coolant Thermostat - 33943S

    Gates® Premium Engine Coolant Thermostat

    PartNumber: 33943S
    Product Specifications
    • Design: Reverse Poppet
    • Height: 1.91
    • Height Between Flanges: 1.25
    • Height from Flange: .66
    • Includes Installation Tool: No
    • Jiggle Pin Weep Hole: No
    • Material: Stainless Steel, Copper
    • Number of Gaskets: 0
    • Number of Jiggle Pins/Check Valves: 0
    • Number of Seals: 1
    • Seal Type: O-Ring
    • Sealing Flange Outside Diameter: 2.12
    • Start to Open Temperature: 180; 82
    • UPC: 770075745327
    • Part Description: Premium Engine Coolant Thermostat
    More Info
    $34.95
  • VEMO Engine Coolant Thermostat - V20-99-0173

    VEMO® Engine Coolant Thermostat

    PartNumber: V20-99-0173
    Product Specifications
    • Height [mm]: 73
    • Length [mm]: 100
    • Opening Temperature [°C]: 82
    • Packaging Depth [cm]: 14,1
    • Packaging height [cm]: 8,2
    • Packaging width [cm]: 8,8
    • Vehicle Equipment: for vehicles with automatic transmission
    • Weight [kg]: 0,107
    • Width [mm]: 98
    • Part Description: Engine Coolant Thermostat
    More Info
    $56.88
  • facet Engine Coolant Thermostat - 7.8349

    facet® Engine Coolant Thermostat

    PartNumber: 7.8349
    Product Specifications
    • Part Description: Engine Coolant Thermostat
    $29.69
  • STANT OE Type Engine Coolant Thermostat - 14099

    STANT® OE Type Engine Coolant Thermostat

    PartNumber: 14099
    Product Specifications
    • Bypass Plate Diameter: 1.7"
    • Flange Diameter (Without Seal): 2.625"
    • Height from Flange to Bottom: 1.03"
    • Height from Flange to Top of Bridge: 0.73"
    • OE Part Number: 07D121111AB, 078121113F, 078121113G
    • Temperature (F): 198 Degrees
    • UPC: 033342054752
    • Part Description: OE Type Engine Coolant Thermostat
    More Info
    $13.33
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About Thermostat

The thermostat is fundamental to the vehicles system in order to keep it cool. It is located by the radiator and it helps keep the engine at the best range for max performance. It is vital that the thermostat is perfect because if the engine is too hot or too cool, the engine can be damaged as well as other components.

Mechanical thermostats

Bimetal is a water and steam that is controlled by the metallic thermostat. While mechanical thermostats are used to control the dampers in the vents. Some heating systems have a valve that is controlled by the thermostat which allows the water and temperature to be adjusted to a certain level.

The wax pellet is used to maintain the engine at a stable temperature by controlling the amount of coolant that travels to the radiator by the expansion of the wax pellet. This component does not limit the amount of flow to the heater core on many makes.

There is also a pneumatic thermostat which restricts the heating or cooling system of tubes at a pressure of 15 to 18 psi.

Common issues with a bad thermostat

A bad thermostat can lead to overheating, blown radiator hose, and inaccurate temperature markings.