Lexus Thermostats

What does the factory thermostat in a car do? That it helps prevent engine overheats is the short answer. However, it's less obvious how a simple valve, one of the many parts of a cooling system, can achieve this. Yes, how your original thermostat works may be simple: it opens and closes using either a spring or piston, and this circulates coolant through your engine and radiator. However, it's getting the interval right that's key. (After all, coolant must stay within the proper temperature range, whether it's hot out or cold.) Everything happens the way it should, though, thanks to the many other auto parts that work at the same time. They work so well that car thermostat failure is rare and the question of when to replace a car thermostat rarely comes up. If your temperature gauge reads constant, dead-center or slightly cold, then, great news: your thermostat's working normally. However, that doesn't mean it can't go bad, with age or otherwise. There are symptoms of a thermostat not working right, namely a lit Check Engine light, improper valve operation, and stuck valves. Usually, they show up as engine problems and AC and heating malfunctions, though. A non-working thermostat valve can't move coolant correctly, and this either results in an overheat or keeps coolant from reaching the appropriate temperature. Engine efficiency then drops, and your HVAC system stops heating and cooling right. Even the hoses and gaskets surrounding the thermostat area can warp, that is, if they don't fail altogether. In these cases, run an inspection. If you need to change your car thermostat, it's best to swap it out with a genuine Lexus thermostat. You can order one from our auto parts counter online. Buy now and enjoy peace of mind down the road.

Refine Results
Thermostat Unit
Part Number: 16031-36010
Other Names: Thermostat, Water Inlet, Inlet Sub-Assembly, Wate More Names
Description: ES300h. 2.5L. More Info
Fits:
  • Lexus:
    • ES300h
MSRP $51.11
$39.95
MSRP $51.11
$39.95
Thermostat Housing
Part Number: 16323-0P030
Positions: Lower
Other Names: Engine Coolant Thermostat Housing, Housing, Water Inlet More Names
Description: Canada built. RX350. Exc.Japan Built. Engine # axxxxxx-gxxxxxx. ES350. Usa built. More Info
Fits:
  • Lexus:
    • ES350,
    • RX350
MSRP $84.19
$62.76
MSRP $84.19
$62.76
Thermostat Gasket
Part Number: 16325-62010
Other Names: Engine Coolant Thermostat Gasket, Thermostat Housing Gasket, Thermostat Seal, Gasket, Water Inlet Seal, Water Inlet Gasket, Gasket,... More Names
Replaces: 16325-0H020
Fits:
  • Lexus:
    • ES250,
    • ES300,
    • ES330,
    • ES350,
    • GS300,
    • IS300,
    • LS400,
    • RX300,
    • RX330,
    • RX350,
    • RX400h,
    • RX450h,
    • SC300,
    • SC400
  • 9 more
MSRP $7.13
$5.56
MSRP $7.13
$5.56
Thermostat Housing
Part Number: 16321-46040
Other Names: Thermostat Cover, Inlet, Water More Names
Replaces: 16321-46030
Description: SC300, GS300. IS300. 3.0L. More Info
Fits:
  • Lexus:
    • GS300,
    • IS300,
    • SC300
MSRP $41.72
$32.60
MSRP $41.72
$32.60
Thermostat Housing
Part Number: 16323-0S020
Positions: Lower
Other Names: Engine Coolant Thermostat Housing, Housing, Water Inlet More Names
Replaces: 16323-38010
Description: LX570. Without tow package. Exc.Towing Package. More Info
Fits:
  • Lexus:
    • LX570
MSRP $66.00
$51.58
MSRP $66.00
$51.58
Thermostat Gasket
Part Number: 16325-0T030
Other Names: Thermostat Seal, Gasket, Water Inlet More Names
Replaces: 16325-28010
Description: 2.5L. NX300h. Hs hybrid. More Info
Fits:
  • Lexus:
    • HS250h,
    • NX300h
MSRP $6.75
$5.28
MSRP $6.75
$5.28
Engine Coolant Thermostat
Part Number: 90916-03075
Other Names: Thermostat More Names
Description: 1992-93. More Info
Fits:
  • Lexus:
    • ES250,
    • ES300
MSRP $35.46
$27.72
MSRP $35.46
$27.72
Engine Coolant Thermostat
Part Number: 90916-03138
Other Names: Thermostat More Names
Description: SC430. GX470. From 07/2006. GS430. More Info
Fits:
  • Lexus:
    • GS430,
    • GX470,
    • LX470,
    • SC430
MSRP $49.10
$38.38
MSRP $49.10
$38.38
Engine Coolant Thermostat
Part Number: 90916-03100
Other Names: Thermostat More Names
Fits:
  • Lexus:
    • GS400,
    • GS430,
    • GX470,
    • LS400,
    • LS430,
    • LX470,
    • SC400,
    • SC430
  • 3 more
MSRP $28.66
$22.40
MSRP $28.66
$22.40
Thermostat Unit Seal
Part Number: 16325-36010
Other Names: Thermostat Gasket, Gasket, Water Inlet More Names
Description: ES300h. 2.5L. More Info
Fits:
  • Lexus:
    • ES300h
MSRP $5.43
$4.24
MSRP $5.43
$4.24
Thermostat Housing Gasket
Part Number: 16346-32010
Other Names: Engine Coolant Thermostat Gasket, Thermostat Gasket, Gasket, Thermostat More Names
Replaces: 16346-17010
Description: 4.0L. From 07/97. O-Ring. To 01/1998. 1998-00, to 1/98. 4.3L. More Info
Fits:
  • Lexus:
    • GS400,
    • GS430,
    • LS400,
    • SC400
MSRP $4.22
$3.30
MSRP $4.22
$3.30
Thermostat Housing Gasket
Part Number: 16325-0P020
Other Names: Engine Coolant Thermostat Housing Gasket, Gasket, Water Inlet More Names
Description: Canada built. Engine # axxxxxx-gxxxxxx. Exc.Japan Built Part. More Info
Fits:
  • Lexus:
    • ES350,
    • RX350
MSRP $2.38
$1.86
MSRP $2.38
$1.86
Engine Coolant Thermostat Housing
Part Number: 16321-50010
Positions: Upper
Other Names: Thermostat Cover, Water Inlet, Inlet, Water More Names
Description: 1992-97. To 09/97. More Info
Fits:
  • Lexus:
    • LS400,
    • SC400
MSRP $41.69
$32.59
MSRP $41.69
$32.59
Engine Coolant Thermostat Housing
Part Number: 16321-20030
Positions: Upper
Other Names: Thermostat Housing, Water Inlet, Water Outlet, Inlet Pipe, Inlet, Water More Names
Replaces: 16321-0A030
Description: ES300. RX300. ES330. RX400h. Type-A. Short Outlet wo/Mounting Tab. 2004-06, japan built, type 1. More Info
Fits:
  • Lexus:
    • ES300,
    • ES330,
    • RX300,
    • RX330,
    • RX400h
MSRP $78.90
$61.66
MSRP $78.90
$61.66
Engine Coolant Thermostat Gasket
Part Number: 16346-50010
Other Names: Thermostat Gasket, Gasket, Water Inlet Gasket, Thermostat Housing Gasket, Thermostat Seal, Gasket, Thermostat More Names
Description: LX470. GX470. O-Ring. 4.3L. 1998-00, from 1-98. From 01/1998. GS430. More Info
Fits:
  • Lexus:
    • GS400,
    • GS430,
    • GX470,
    • LS400,
    • LS430,
    • LX470,
    • SC400,
    • SC430
  • 3 more
MSRP $5.60
$4.38
MSRP $5.60
$4.38
Engine Coolant Thermostat Gasket
Part Number: 16346-66020
Other Names: Gasket, Thermostat More Names
Fits:
  • Lexus:
    • LX450
MSRP $5.60
$4.38
MSRP $5.60
$4.38
Thermostat Housing O-Ring
Part Number: 16325-38010
Other Names: Water Inlet Gasket, Engine Coolant Thermostat Housing Gasket, Gasket, Water Inlet More Names
Fits:
  • Lexus:
    • GX460,
    • LX570
MSRP $2.38
$1.86
MSRP $2.38
$1.86
Engine Coolant Thermostat Housing Gasket
Part Number: 16119-66020
Other Names: Gasket, Thermostat G More Names
Fits:
  • Lexus:
    • LX450
MSRP $6.49
$5.07
MSRP $6.49
$5.07
Thermostat
Part Number: 90916-03093
Description: SC300, GS300. IS300. 3.0L. More Info
Fits:
  • Lexus:
    • GS300,
    • IS300,
    • SC300
MSRP $28.71
$22.44
MSRP $28.71
$22.44
Thermostat
Part Number: 90916-03117
Replaces: 90916-03094
Description: LX450. More Info
Fits:
  • Lexus:
    • LX450
MSRP $31.52
$24.64
MSRP $31.52
$24.64
Thermostat
Part Number: 16342-70010
Other Names: Valve, Water Control More Names
Description: Water control valve. LS500. More Info
Fits:
  • Lexus:
    • LS500
MSRP $910.47
$645.90
MSRP $910.47
$645.90
Thermostat
Part Number: 90916-03154
Positions: Right, Left
Fits:
  • Lexus:
    • GS Turbo,
    • GS200t,
    • GS300,
    • IS200t,
    • IS300,
    • NX200t,
    • NX300,
    • RC Turbo,
    • RC200t,
    • RC300
  • 5 more
MSRP $35.88
$28.04
MSRP $35.88
$28.04
Thermostat
Part Number: 90916-03136
Description: Hs hybrid. More Info
Fits:
  • Lexus:
    • HS250h
MSRP $28.55
$22.31
MSRP $28.55
$22.31
Thermostat
Part Number: 90916-03156
Positions: Left, Right
Fits:
  • Lexus:
    • GS200t,
    • GS300,
    • IS200t,
    • IS300,
    • NX200t,
    • NX300,
    • RC Turbo,
    • RC200t,
    • RC300
  • 4 more
MSRP $63.44
$49.58
MSRP $63.44
$49.58
Thermostat
Part Number: 90916-A3002
Replaces: 90916-03133, 90916-03140, 90916-A3001
Description: RX350. Japan built. 3.5L. ES350. RX450h. 2007-09. More Info
Fits:
  • Lexus:
    • ES350,
    • RX350,
    • RX450h
MSRP $28.55
$22.31
MSRP $28.55
$22.31
Thermostat
Part Number: 90916-A3003
Replaces: 90916-03084, 90916-03129
Description: LS400, SC400. ES300. 1992-97. RX300. 1994-96. 2004-06. ES330. RX400h. More Info
Fits:
  • Lexus:
    • ES300,
    • ES330,
    • LS400,
    • RX300,
    • RX330,
    • RX400h,
    • SC400
  • 2 more
MSRP $28.58
$22.33
MSRP $28.58
$22.33
Thermistor
Part Number: 88620-0R010
Other Names: Thermostat Assembly More Names
Replaces: 88620-28060
Description: 250h. More Info
Fits:
  • Lexus:
    • UX250h
MSRP $38.20
$29.86
MSRP $38.20
$29.86
Water Inlet
Part Number: 16031-0S010
Other Names: Thermostat Unit, Thermostat Housing, Thermostat, Inlet Sub-Assembly, Wate More Names
Replaces: 16031-38010
Notes: 28. More Notes
Fits:
  • Lexus:
    • GS F,
    • GS460,
    • GX460,
    • IS F,
    • LC500,
    • LS460,
    • LS600h,
    • LX570,
    • RC F
  • 4 more
MSRP $55.19
$43.13
MSRP $55.19
$43.13
Water Inlet
Part Number: 16321-0F010
Positions: Upper
Other Names: Thermostat Housing, Engine Coolant Thermostat Housing, Thermostat Cover, Inlet, Water More Names
Replaces: 16321-50020
Description: LX470. Cover. GX470. 1998-00. 4.0L. GS400. 4.3L. GS430. From 07/97. More Info
Fits:
  • Lexus:
    • GS400,
    • GS430,
    • GX470,
    • LS400,
    • LS430,
    • LX470,
    • SC400,
    • SC430
  • 3 more
MSRP $78.90
$61.66
MSRP $78.90
$61.66
Gasket
Part Number: 16346-36011
Positions: Left, Right
Other Names: Water Inlet Gasket, Thermostat Gasket, Gasket, Thermostat More Names
Replaces: 16346-36010
Description: RC200t, RC Turbo, RC300. NX300. IS300. 2.0l. Left. NX200t. IS200t. Right. GS200t. For t-stat: wax 82-95. GS300. More Info
Fits:
  • Lexus:
    • GS Turbo,
    • GS200t,
    • GS300,
    • IS200t,
    • IS300,
    • NX200t,
    • NX300,
    • RC Turbo,
    • RC200t,
    • RC300
  • 5 more
MSRP $6.21
$4.86
MSRP $6.21
$4.86
Water Inlet
Part Number: 16031-31020
Other Names: Thermostat Housing, Thermostat Unit, Engine Coolant Thermostat Kit, Inlet Sub-Assembly, Wate More Names
Notes: 58. More Notes
Fits:
  • Lexus:
    • GS300,
    • GS350,
    • GS450h,
    • IS250,
    • IS300,
    • IS350,
    • RC300,
    • RC350
  • 3 more
MSRP $71.77
$56.10
MSRP $71.77
$56.10
Water Inlet Gasket
Part Number: 16326-38010
Other Names: Gasket, Thermostat Unit Gasket, Thermostat Housing O-Ring, Thermostat Seal, Thermostat Unit O-Ring, Gasket, Water Inlet More Names
Notes: 31. More Notes
Fits:
  • Lexus:
    • GS F,
    • GS460,
    • GX460,
    • IS F,
    • LC500,
    • LS460,
    • LS600h,
    • LX570,
    • RC F
  • 4 more
MSRP $5.57
$4.36
MSRP $5.57
$4.36
Water Inlet
Part Number: 16321-20010
Other Names: Thermostat Housing, Inlet, Water More Names
Replaces: 16321-0A020
Description: ES300. 1994-96. More Info
Fits:
  • Lexus:
    • ES300
MSRP $95.97
$71.54
MSRP $95.97
$71.54
Gasket
Part Number: 16326-31020
Other Names: Water Inlet Gasket, Thermostat Housing Gasket, Thermostat Unit Gasket, Engine Coolant Thermostat Gasket, Gasket, Water Inlet More Names
Replaces: 16326-31010
Notes: 32. More Notes
Fits:
  • Lexus:
    • GS300,
    • GS350,
    • GS450h,
    • IS250,
    • IS300,
    • IS350,
    • RC300,
    • RC350
  • 3 more
MSRP $1.35
$1.05
MSRP $1.35
$1.05
Water Inlet
Part Number: 16031-24021
Other Names: Thermostat, Inlet Sub-Assembly, Wate More Names
Replaces: 16031-24020
Description: UX250h. More Info
Fits:
  • Lexus:
    • UX250h
MSRP $69.36
$54.21
MSRP $69.36
$54.21
Water Inlet
Part Number: 16323-0S010
Other Names: Thermostat Housing, Housing, Water Inlet More Names
Replaces: 16323-38020
Description: LX570. With tow package. All. More Info
Fits:
  • Lexus:
    • LX570
MSRP $67.12
$52.46
MSRP $67.12
$52.46
Water Manifold Gasket
Part Number: 16345-F0020
Other Names: Thermostat Gasket, Gasket, Water Outlet More Names
Replaces: 16345-25030
Description: ES300h. 2.5L. More Info
Fits:
  • Lexus:
    • ES300h
MSRP $4.11
$3.21
MSRP $4.11
$3.21
Engine Coolant Pipe O-Ring
Part Number: 96761-35035
Positions: Lower
Other Names: Housing Gasket, Thermostat Housing O-Ring, Thermostat Housing Seal, Ring, O More Names
Description: Lower Thermostat Housing. 4.3L. More Info
Fits:
  • Lexus:
    • GS F,
    • GS400,
    • GS430,
    • GS460,
    • GX460,
    • GX470,
    • IS F,
    • LC500,
    • LS400,
    • LS430,
    • LS460,
    • LS600h,
    • LX470,
    • LX570,
    • RC F,
    • SC400,
    • SC430
  • 12 more
MSRP $4.65
$3.64
MSRP $4.65
$3.64
Water Inlet
Part Number: 16031-31031
Other Names: Thermostat, Inlet Sub-Assembly, Wate More Names
Replaces: 16031-31030
Description: Without hybrid. RX350. RX450h. 3.5L. ES350. More Info
Notes: 20. More Notes
Fits:
  • Lexus:
    • ES350,
    • RX350,
    • RX350L,
    • RX450h
MSRP $62.21
$48.62
MSRP $62.21
$48.62
Water Inlet Seal
Part Number: 16326-37020
Other Names: Thermostat Gasket, Gasket, Water Inlet More Names
Description: CT200h. More Info
Fits:
  • Lexus:
    • CT200h
MSRP $5.49
$4.29
MSRP $5.49
$4.29
Water Inlet
Part Number: 16031-24011
Other Names: Thermostat, Inlet Sub-Assembly, Wate More Names
Replaces: 16031-24010
Description: 200. More Info
Fits:
  • Lexus:
    • UX200
MSRP $58.41
$45.66
MSRP $58.41
$45.66
Housing Stud
Part Number: 92122-B0825
Other Names: Thermostat Housing Stud, Bolt, Stud More Names
Fits:
  • Lexus:
    • GX470,
    • SC430
MSRP $1.72
$1.35
MSRP $1.72
$1.35
Gasket
Part Number: 16325-36051
Positions: Inner, Right, Left
Other Names: Water Outlet Gasket, Thermostat Gasket, Engine Coolant Thermostat Gasket, Gasket, Water Inlet More Names
Description: 2.0L, #1. Inner Thermostat. IS300. 2.0l. Right. IS200t. Left. GS200t. For t-stat: wax 78-91. GS300. More Info
Fits:
  • Lexus:
    • GS200t,
    • GS300,
    • IS200t,
    • IS300,
    • IS350,
    • NX200t,
    • NX300,
    • RC200t,
    • RC300
  • 4 more
MSRP $7.58
$5.92
MSRP $7.58
$5.92
In-Car Sensor
Part Number: 88620-74010
Other Names: Thermistor, Thermostatic Switch, Thermistor Assembly, Air More Names
Description: LS500. Without hybrid. More Info
Fits:
  • Lexus:
    • LS500
MSRP $38.20
$29.86
MSRP $38.20
$29.86
Water Inlet
Part Number: 16321-31030
Other Names: Inlet Pipe, Thermostat Housing, Inlet, Water More Names
Replaces: 16321-31011
Description: RX350. Japan built. 3.5L. Without tow hitch. RX450h. Without towing package. ES350. 2007-09. More Info
Fits:
  • Lexus:
    • ES350,
    • RX350,
    • RX450h
MSRP $41.35
$32.32
MSRP $41.35
$32.32
Water Inlet O-Ring
Part Number: 16326-31050
Other Names: Water Inlet Gasket, Thermostat Gasket, Gasket, Engine Coolant Thermostat Gasket, Gasket, Water Inlet More Names
Description: 3.5L, without hybrid. GS350. IS300. 3.5l. IS350. RC300. RC350. O-Ring. LS500h. RX350L. RX450hL. More Info
Fits:
  • Lexus:
    • ES350,
    • GS350,
    • IS300,
    • IS350,
    • LC500h,
    • LS500h,
    • RC300,
    • RC350,
    • RX350,
    • RX350L,
    • RX450h,
    • RX450hL
  • 7 more
MSRP $0.72
$0.56
MSRP $0.72
$0.56
In-Car Sensor
Part Number: 88620-30290
Other Names: Thermistor, Thermostatic Switch, Thermistor Assembly, Air More Names
Description: LS500h. With hybrid. More Info
Fits:
  • Lexus:
    • LS500,
    • LS500h
MSRP $42.59
$33.29
MSRP $42.59
$33.29
Water Outlet Gasket
Part Number: 16325-31010
Other Names: Engine Coolant Thermostat Housing Gasket, Thermostat Housing Gasket, Housing Gasket, Gasket, Water Inlet More Names
Description: Is 250/350. 3.0, 3.5L. To 10/2017. To 11/2017. 2007-09. Japan Built. More Info
Fits:
  • Lexus:
    • ES350,
    • GS300,
    • GS350,
    • GS450h,
    • IS250,
    • IS300,
    • IS350,
    • RC300,
    • RC350,
    • RX350,
    • RX450h
  • 6 more
MSRP $1.98
$1.55
MSRP $1.98
$1.55
Water Inlet
Part Number: 16321-0P010
Positions: Upper
Other Names: Engine Coolant Thermostat Housing, Inlet, Water More Names
Description: Canada built. Exc.Japan Built. Engine # axxxxxx-gxxxxxx. ES350. Usa built. More Info
Fits:
  • Lexus:
    • ES350,
    • RX350
MSRP $39.08
$30.54
MSRP $39.08
$30.54
Water Outlet
Part Number: 16304-31037
Positions: Lower
Other Names: Engine Coolant Thermostat Housing, Outlet Sub-Assembly, Wat More Names
Replaces: 16304-31030, 16304-31031, 16304-31032, 16304-31033, 16304-31034, 16304-31035, 16304-31036
Notes: 16. More Notes
Fits:
  • Lexus:
    • GS300,
    • GS350,
    • GS450h,
    • IS250,
    • IS300,
    • IS350,
    • RC300,
    • RC350
  • 3 more
MSRP $163.80
$122.12
MSRP $163.80
$122.12

No results found for "thermostat". Here are some helpful search tips:

  • Search by a part name. Example: water pump.
  • Be less specific. Example: brake instead of ceramic brake.
  • Remove information such as make, year or model.
  • Can't find the part you are looking for? Contact us and we'll find it for you!