AISIN THT-004 thermostat for the 2013-2018 Lexus GS450h V6 3.5L and other vehicles controls coolant flow through the engine.
- Thermostat and housing supplied together as one assembly
- Exact-temperature operation for the cooling system
- Keeps coolant within the optimal temperature range
- Maintains cooling system performance
Quick facts
- Part: AISIN THT-004 thermostat
- Also called: engine coolant thermostat
- Fits: 2013-2018 Lexus GS450h V6 3.5L and other vehicles
- Condition: New
A thermostat that sticks can show up as an engine that runs hotter than normal, one that is slow to warm up, or coolant seepage at the housing. Those signs can mean this thermostat is worn, though a weak water pump or a leaking radiator hose can be behind them too, so find the cause before you replace anything.
Fits
This engine coolant thermostat is OE manufactured for exact form, fit and function. The vehicles it fits include the 2016-2018 Lexus IS300 V6 3.5L and the 2006-2017 Lexus IS350 V6 3.5L, and a single thermostat goes on each engine. If your Lexus is not among those named, match its year and engine in the "Vehicles it fits" section.
Specifications
- Type: thermostat and housing assembly
- Quantity per vehicle: 1
- Condition: new
Interchange: 143-0879 · 16031-31020 · 660-180 · WH-TB-82
34711
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
143-0879, 34711, 16031-31020, 660-180, THT-004, WH-TB-82
Frequently Asked Questions
Is this the right thermostat for a 2016-2018 Lexus IS300 V6 3.5L?
Yes. AISIN THT-004 fits the 2016-2018 Lexus IS300 V6 3.5L, and one thermostat goes on that engine.
Does this thermostat suit a 2006-2017 Lexus IS350 V6 3.5L?
Yes. This AISIN THT-004 fits the 2006-2017 Lexus IS350 V6 3.5L, with one thermostat per engine.
Does the THT-004 come with its housing?
Yes. It is sold as a thermostat and housing assembly, so the housing comes together with the thermostat.
What can a failing AISIN thermostat do to engine temperature?
A thermostat stuck shut or open can leave the engine running hotter than normal or slow to warm up. With the engine cool, you can also look for coolant seepage around the housing.
Does THT-004 replace number 16031-31020?
Yes. 16031-31020 is one of the numbers AISIN THT-004 replaces, along with 143-0879, 660-180, WH-TB-82 and 34711.
