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AISIN GENUINE THT-004 Engine Coolant Thermostat with Housing and Gasket - Compatible with Select Lexus GS300, GS350, GS450h, IS250, IS300, IS350, RC300, RC350

Based on 154 reviews
Condition: New
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$31.40

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Availability: In Stock.
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Arrives Monday, Nov 2
Order within 18 hours and 27 minutes

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At a glance

Condition
New
Model
THT-004
Dimensions
4.1 x 4.1 x 3.7 in
Weight
7 oz
Exterior
Machined
OEM Part Number
16031-31020
Mirror Adjustment
Button Control

Features 6

  • AISIN OE matched engine coolant thermostats are designed for efficient, consistent performance
  • With superior OE technology and know-how, AISIN ensures that every thermostat provides perfect OE form, fit, and function
  • Manufactured using only the highest quality materials for long life and dependable cooling system performance
  • All AISIN thermostats feature the correct OE specified operating temperature

Description

AISIN OE matched engine coolant thermostats are designed for efficient, consistent performance and manufactured using only the highest quality materials. With superior OE technology and know-how, AISIN ensures that every thermostat provides perfect OE form, fit, and function and features the correct OE specified operating temperature. AISIN is a leader in the development and production of high-quality original equipment matched components and systems for the automotive industry. Founded in 1965 to produce original equipment automotive parts, AISIN has grown into a $25+ billion global enterprise with approximately 70,000 employees worldwide. Superior products through engineering excellence, progressive technological development, and dedication to service are some factors which have contributed to bringing AISIN to its position as a multiple-award-winning global leader in automotive parts. Set Contains: Thermostat

Specs 11

Manufacturer AISIN
Brand AISIN
Model AISIN
Item Weight 7 ounces
Product Dimensions 4.1 x 4.1 x 3.7 inches
Item model number THT-004
Exterior Machined
Manufacturer Part Number THT-004

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Nov 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


Fits 2006 IS350
This part fit great and is made very well. Fixed cooking issues on a 2006 IS350
Reviewed in the United States on August 16, 2023 by Jason C.

An OEM part. Fit my 11 GS350
It is an OEM part with "Toyota" rubbed off and replaced with a "TAMA Thermostat" sticker. They and AISIN are pretty much an OEM supplier to the major Japanese brands. Your reliable transmission? Made by AISIN. They probably sell any overstock as their brand. 100% you can trust this aftermarket brand. Toyota does, puts it in their box, charges $30 more. It is important to have original OEM for a plastic housing, some Fords have this similar setup and fail. If I had to do over replacing it, I would have removed the water housing (like the book says). But it is doable with some creativity leaving it on and removing the hoses. Spec is 7ft/lbs-84 in/lbs for the nuts (or bolts, depending how they come out!). Do not overtighten! I used a no spill funnel to fill the system, was due for 100K service. If the review stays the same, the part is working. ... show more
Reviewed in the United States on March 11, 2022 by Lenny

Same as OEM
This is the exact company the makes all mechanical parts for these engines/transmissions. The sensors are made by Denso and AISIN makes the rest. peel the sticker back and see for yourself. If anybody had an issue is most likely they have a 2GR and did not bleed the air out the bleeder.
Reviewed in the United States on August 21, 2022 by Daniel Daniel

fits my 08 lexus is 350
fit my 08 lexus rx350
Reviewed in the United States on December 16, 2022 by Bob S.

OEM, great quality at an affordable price, thank you! A+
OEM, great quality at an affordable price, thank you! A+
Reviewed in the United States on August 8, 2022 by Amazon Customer

Fits and works great on 2007 IS350
Authentic OEM replacement for 2007 IS350. Works great, no leaks, and is identical to the original thermostat. Probably didn't need replace it but why not. It's extra insurance since I'm already replacing the water pump anyway.
Reviewed in the United States on July 15, 2021 by fogcity

Works just like the OEM one
Replaced it when I was doing the water pump replacement for my 08 is250. No leak, works just like the old OEM one.
Reviewed in the United States on November 16, 2021 by Yi

It work the best
This thermostat fit perfect, it made in Japan I think it original oem.
Reviewed in the United States on October 20, 2021 by Chamrong c.
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