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AISIN THT-019 Engine Coolant Thermostat - Compatible with Select Lexus ES, HS, LS, RX, SC Scion tC, xB, xD Toyota 4Runner, Avalon, Camry, Corolla, Highlander, RAV4, Sienna, Tacoma, Tundra + More

  • Based on 571 reviews
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Availability: In Stock.
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Arrives Sunday, Jul 26
Order within 21 hours and 48 minutes
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Features

  • 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
  • Gasket not included
  • Compatible with select vehicles (engine may affect fitment - verify specific fitment details with fit checker above): LEXUS: 1990-91 ES250, 1992-03 ES300, 2004-06 ES330, 2007-18 ES350, 2010-12 HS250h, 1996-97 LS400, 1999-03 RX300, 2004-06 RX330
  • Compatible with (continued): LEXUS: 2007-15 RX350, 2006-08 RX400h, 2010-15 RX450h, 1996-97 SC400; SCION: 2005-16 tC, 2008-15 xB, 2008-14 xD; TOYOTA: 1996-02 4Runner, 1995-18 Avalon, 1988-17 Camry, 1990-93,2000-05 Celica, 1998-14 Corolla
  • Compatible with (continued): TOYOTA: 2001-19 Highlander, 2003-14 Matrix, 1991-95 MR2, 2000-06 MR2 Spyder, 2001-18 RAV4, 1998-16 Sienna, 1999-08 Solara, 1995-98 T100, 1995-04 Tacoma, 2000-04 Tundra, 2009-16 Venza

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.

Brand: AISIN


Model Name: AISIN


Controller Type: touch


Color: Factory


Specific Uses For Product: [POSSIBLE USES Engine temperature regulation, Vehicle heating and cooling system control, Automotive cooling system maintenance] See more


Controller Type: touch


Specific Uses For Product: [POSSIBLE USES Engine temperature regulation, Vehicle heating and cooling system control, Automotive cooling system maintenance]


Temperature Control Type: automatic


Connectivity Technology: Wired


Power Source: Corded Electric


Voltage: 12 Volts


Display Type: manual


Control Type: Button Control


Control Method: Touch


Connectivity Protocol: Wired


Mounting Type: Direct Engine Mount


Backlight: No


Smart Home Compatibility: Not Smart Home Compatible


Color: Factory


Shape: cylindrical


Product Style: Modern


Brand Name: AISIN


Model Name: AISIN


Included Components: thermostat


Model Number: THT-019


Manufacturer Warranty Description: 1 year.


Global Trade Identification Number: 01


Manufacturer: AISIN


Manufacturer Part Number: THT-019


Item Type Name: Aisin THT-019 OE Engine Coolant Thermostat


Unit Count: 1.0 Count


Material Type: Alloy Steel, Plastic


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jul 26

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


  • High Quality Thermostat High Quality Thermostat
Tested sat out of the box for once, I've tried a lot of thermostat brands (even Napa) and they are very hit or miss these days. Quality control since the pandemic has been atrociously worse. Aisin however has remained top notch. Opens right at the advertised temp and opens linearly until maximum opening, and reliably opens and closes effectively. Works well. Don't forget a thermostat gasket if you need one (but don't add one if you don't!) ... show more
Reviewed in the United States on November 12, 2025 Reviewed in the United States on November 12, 2025 by Josh Henderson

  • Factory replacement
Exact fit and replacement for your factory part
Reviewed in the United States on April 10, 2026 by Bradley

  • It just works
It's thermy the thermostat, he's chilling in your engine helping to keep everything cool
Reviewed in the United States on June 6, 2026 by Jordan

  • Good to go!
After a snafu with the original order, a replacement was promptly sent to me. The thermostat is what the OEM uses, so I expect many, many years of service out of this.
Reviewed in the United States on June 8, 2026 by Trent C.

  • As Good as the Original
This thermostat functions just as well as the original from Toyota. Since Aisin is an OEM supplier, this may be the exact same part. It fits perfectly in the 1MZ-FE engine in my 1999 Camry. Doesn't come with the gasket, but the gasket is cheap and readily available. Just make sure the "jiggle" valve is on top when your install it. ... show more
Reviewed in the United States on February 15, 2025 by Austin

  • A Great alternative to oem
"What such high quality at an affordable price! It's the same quality as OEM, but at a lower price. Please do not buy the cheap, unbranded ones just to save a few dollars; think about the long term instead. Paying only 10-15 dollars for a high-quality one is far better than buying a cheap one that won't last long. The only con I noticed is the exclusion of the gasket; you need to buy it separately." ... show more
Reviewed in the United States on April 10, 2026 by musheer

  • All mechanics are not bad . Just do some checking before you ok the work !
This took care of my cooling issues,over heating over flowing and stalling. Went to a name brand shop for repairs and they could not find out why it was over heating after $635.00! Was then told to bring it back after diving it for a while to clear any thing in the cooling system. The thermostat had been gutted so the water could circulate I went and replaced the stat myself with this one and no more cooling issues! 2004 Toyota Matrix XRS. ... show more
Reviewed in the United States on September 4, 2025 by Esse

  • Sienna finally reaches operating temp in winter!
Installed on 2013 Toyota Sienna. It wasn't reaching operating temperature in the winter, but does now after replacing with this thermostat. Quality appears to be OEM (Aisin). Pay attention to the position of the little "jiggle valve" when installing. The gasket is sold separately but should probably be replaced at the same time. ... show more
Reviewed in the United States on January 16, 2026 by HPDinAK

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