A properly functioning engine thermostat is crucial for maintaining optimal engine temperature, preventing overheating or undercooling. Choosing the right replacement part ensures your vehicle's longevity and performance. This guide will help you navigate the options and select the best thermostat for your automotive needs.
- Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
- Premium aftermarket replacement part
- Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models
- Quality-controlled factory calibration assures accuracy of opening and closing, regardless of pressure changes
- OEM fit, function and design for precise engine cooling
- > Jiggle pins for air venting, seals and gaskets make these thermostats equivalent to the original equipment parts
- Comes with the thermostat and gasket you need to replace the thermostat
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function
- 【THERMOSTAT REPLACEMENT】90916-A3003, 90916A3003, 90916-03129, 9091603129 Engine Thermostat For Toyota Is 100% Rigorously Tested Before Shipping. Check The Part Number To Confirm The Compatibility Before Purchase. High Quality Materials, Engine...
- 【COMPATIBLE WITH TOYOTA VEHICLES】Thermostat Compatible With 1994 Camry 2.2L L4, 3.0L V6 | 1995-2001 Camry 3.0L V6 | 2002-2006 Camry 2.4L L4 | 2004-2006 Camry 3.3L V6 | 2010-2017 Camry 2.5L L4 | 1995-2004 Avalon | 1990-1993,2000-2005 Celica...
- 【COMPATIBLE WITH LEXUS VEHICLES】Thermostat Compatible With 1990-1991 ES250 L4 2.5L | 1992-1994 ES300 V6 3.0L | 1994-2003 ES300 | 2004-2006 ES330 | 1993-2005 GS300 | 2001-2005 IS300 | 1990-1997 LS400 | 1999-2003 RX300 | 2004-2006 RX...
- 【COMPATIBLE WITH SCION VEHICLES】Thermostat Compatible With 2005-2006, 2011-2016 Scion tC | 2004-2006 Scion xB | 2004-2006 Scion xA | 2008-2010 Scion xD Thermostat.
- 【Replace Vehicles Year】Can Fit Vehicles Included Year 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019, Please Check The Year/Make/Model...
- 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: 1998-00 GS400, 2001-07 GS430, 2003-09 GX470, 1998-00 LS400, 2001-06 LS430, 1996-97 LX450, 1998-07 LX470
- Compatible with (continued): LEXUS: 1998-00 SC400, 2002-10 SC430; TOYOTA: 2003-09 4Runner, 1993-07 Land Cruiser, 2001-09 Sequoia, 2000-09 Tundra
- Repairs leaking thermostat housings
- Corrects engine overheating caused by failed thermostat
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function; Thermostat Material: Steel
- country of origin : china
- the package height of the product is 2.55 inches
- the package length of the product is 4.02 inches
- the package width of the product is 3.35 inches
- Fit type: Vehicle Specific
- Motorcraft Thermostat Assembly - RT1255
- Item Package Dimension: 4.05L x 2.94W x 2.35H inches
- Item Package Weight - 0.20 Pounds
- Item Package Quantity - 1
- Product Type - AUTO PART
- Ideal replacement - this engine coolant thermostat housing assembly directly replaces the original water outlet on specified vehicle years, makes and models
- Durable construction - this part is specifically designed to withstand extreme temperature changes and resist cracking and leaking
- Century of experience - for over 100 years, Dorman Products has provided quality automotive replacement parts to its customers
- Industry-leading design - professionally engineered by the aftermarket leader in replacement thermostat housing assemblies
- Ensure fit - Input your vehicle into the garage tool and check Confirmed Fit bar at the top of the page. If there is an “i” in a blue circle, additional verification is needed. Please hover over the "i" to verify fitment notes match your vehicle
- Larger than OEM opening allowing for up to 50 percent increase in coolant flow
- Triple bridge opening design for increased stability and strength
- Manufactured from high quality components to meet the demanding conditions of the automotive cooling system
- Copper case and wax compound assures rapid response to temperature changes in the coolant
- Offset design, air relief valve and OEM style seals included where applicable
- Fit type: Vehicle Specific
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Last update on 2026-06-08 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Engine Thermostats
Understanding Thermostat Types
Replacement thermostats generally fall into a few categories. The most common is the "wax pellet" type, which uses a temperature-sensitive wax to expand and contract, opening and closing the valve. Some high-performance or specialized applications might use "thermal switch" thermostats, though these are less common for standard replacements. For most vehicles, a direct-fit wax pellet thermostat designed for your specific make and model is the appropriate choice.
Key Features to Consider
- Temperature Rating: This is the most critical specification. It indicates the temperature at which the thermostat begins to open. Using the incorrect rating can lead to engine damage. Always consult your vehicle's owner's manual or a reliable parts catalog for the OEM-specified temperature.
- Material and Construction: Most thermostats are made of brass or stainless steel. Look for durable materials and a well-constructed sealing mechanism to prevent leaks and ensure longevity.
- Stantard vs. High-Flow: While most replacements are standard, some performance vehicles might benefit from high-flow thermostats, which allow coolant to circulate more freely. Ensure compatibility before opting for a high-flow model.
- Included Gasket or Seal: Some thermostats come with a pre-installed gasket or O-ring, simplifying installation. If not included, ensure you purchase the correct one separately.
Compatibility is Crucial
The single most important factor when buying a replacement thermostat is ensuring it's compatible with your vehicle's make, model, and year. Thermostats are engineered for specific engine cooling systems. Using an incompatible part can lead to poor performance, overheating, or leaks.
Installation and Maintenance Tips
Replacing a thermostat typically involves draining some coolant, removing the thermostat housing, swapping the old unit for the new one (ensuring correct orientation), and refilling the coolant system. It's often recommended to replace the thermostat along with the coolant and potentially the radiator cap, especially if they are old. Always follow the vehicle manufacturer's recommended service intervals for coolant system maintenance.