AISIN
0 ratings
AISIN GENUINE THT-004 Engine Coolant Thermostat with Housing and Gasket - Compatible with Select Lexus GS300, GS350, GS450h, IS250, IS300, IS350, RC300, RC350
genuine image
AISIN GENUINE THT-004 Engine Coolant Thermostat with Housing and Gasket - Compatible with Select Lexus GS300, GS350, GS450h, IS250, IS300, IS350, RC300, RC350
OE manufactured thermostats from AISIN that ensure a perfect fit and reliable performance.
AISIN GENUINE THT-004 Engine Coolant Thermostat with Housing and Gasket - Compatible with Select Lexus GS300, GS350, GS450h, IS250, IS300, IS350, RC300, RC350
Item #: 16866522

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

Item #: 16866522

BHD 17

Price Details

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

*All items will import from US

0 ratings Write a review
In stock
us Imported from USA store

QTY:

Order now and get it around Thursday, September 10
Secured transactionsecured transaction

Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.

Our Top Logistics Partners
  • fedex
  • dhl
  • aramex
OE manufactured thermostats from AISIN that ensure a perfect fit and reliable performance.
U-Care Warranty:
None
Select a Plan
fast shipping

Fast
Shipping

free return

Free
Return*

secure packaging

Secure Packaging

100% original products

100% Original Products

pci-dss

PCI DSS Compliance

iso certified

ISO 27001 Certified

paypal payment
visa payment
mastercard payment
benefit payment
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.

What Stands Out

Complete Assembly
This engine coolant thermostat includes housing and gasket, providing a complete solution for easy installation, eliminating the hassle of sourcing separate components.
Optimal Compatibility
Engineered specifically for select Lexus models, ensuring perfect fit and reliable performance, reducing the risk of overheating and ensuring engine efficiency.
Quality Assurance
Manufactured with high-quality materials to withstand extreme temperatures, guaranteeing longevity and consistent performance compared to competitors, enhancing vehicle reliability.

Product Details

Get the best deals on AISIN THT-004 Thermostat with Housing at Ubuy Bahrain. OE manufactured, exact form, fit and function. Maintains cooling system performance. Shop now!

Who Should Buy?

Suitable For
  • Lexus Owners

    Ideal replacement for owners of compatible Lexus models to ensure optimal engine temperature regulation.

  • DIY Mechanics

    Perfect for home mechanics looking to perform their own maintenance with a reliable thermostat and housing kit.

  • Preventative Maintenance

    Useful for drivers aiming to prevent overheating issues by proactively replacing old thermostats in their vehicles.

Not Suitable For
  • Non-Lexus Vehicles

    Not suitable for vehicles outside the specified compatible Lexus models, limiting its usability.

Product Description

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

About This Item

Introducing the AISIN THT-004 Thermostat with Housing - the perfect solution for maintaining optimal engine temperature in your vehicle. This high-quality thermostat is designed to ensure that your engine operates at the right temperature, providing improved fuel efficiency and performance. With its durable construction and precise engineering, the AISIN THT-004 thermostat is built to last, ensuring reliable performance mile after mile.

The included housing is an essential component of the thermostat, providing a secure and leak-free connection. Made with premium materials, it is designed to withstand the rigors of the engine environment, ensuring long-lasting durability and a tight seal. Not only does the AISIN THT-004 Thermostat with Housing offer exceptional functionality, but it is also compatible with a wide range of vehicles.

Whether you have a sedan, SUV, or truck, this thermostat is designed to fit seamlessly and deliver reliable results. Installation is a breeze, thanks to the user-friendly design of the AISIN THT-004 Thermostat with Housing. Simply follow the included instructions and enjoy the benefits of improved engine temperature control.

Trust in AISIN, a trusted brand known for its commitment to quality and performance. The AISIN THT-004 Thermostat with Housing is an OEM-compatible product that meets or exceeds the manufacturer's specifications, ensuring a seamless replacement for your original thermostat. Upgrade your engine's cooling system with the AISIN THT-004 Thermostat with Housing.

Experience the benefits of enhanced engine performance, improved fuel efficiency, and reliable temperature control. Don't settle for anything less than the best for your vehicle - choose AISIN. Order yours today and experience the difference!.

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What vehicles are compatible with the AISIN THT-004 Engine Coolant Thermostat?

    Answer: The AISIN THT-004 Engine Coolant Thermostat is specifically designed to be compatible with several Lexus models, including the GS300, GS350, GS450h, IS250, IS300, IS350, RC300, and RC350. This compatibility ensures that it fits perfectly in these vehicle models, helping maintain optimal engine temperature. Having the right thermostat is crucial, as it regulates the coolant flow based on the engine's needs. If you're unsure about compatibility, check your vehicle's specifications or consult with a mechanic.
  • Question: What symptoms indicate that the thermostat needs to be replaced?

    Answer: Several signs can indicate a failing thermostat, such as overheating engine, erratic temperature readings on the gauge, or coolant leaks near the housing. If your engine frequently runs too hot or too cold, it may not be regulating temperature properly. Addressing these symptoms promptly can prevent further engine damage, and replacing the thermostat can restore your vehicle's cooling efficiency. If you detect these symptoms while driving, it's prudent to get your vehicle checked to avoid serious issues down the line.
  • Question: How do I install the AISIN THT-004 Engine Coolant Thermostat?

    Answer: To install the AISIN THT-004, you'll typically need to drain the coolant, remove any components obstructing access to the thermostat, and then replace the old thermostat with the new one, ensuring the gasket is properly seated to prevent leaks. It's essential to follow the manufacturer’s instructions for your specific vehicle model for precision. This task involves basic mechanical skills, so if you're unsure, consulting a professional mechanic can save time and prevent potential mistakes during installation.
  • Question: What is the role of the Engine Coolant Thermostat?

    Answer: The Engine Coolant Thermostat plays a vital role in regulating the engine's temperature by controlling the flow of coolant between the engine and the radiator. It ensures that the engine reaches the optimal operating temperature for efficiency, performance, and emissions control. When functioning properly, it helps to prevent overheating and maintains a steady temperature, contributing to the overall health of your vehicle. By ensuring your thermostat operates correctly, you're supporting better engine longevity and performance.
  • Question: What should I check if my car is overheating?

    Answer: If your car is overheating, it's essential to check several components: first, verify the coolant level, as low coolant can lead to overheating. Next, inspect the radiator and hoses for leaks or blockages. If the thermostat is stuck closed, it will prevent coolant from circulating, leading to increased engine temperatures. Monitoring the dashboard temperature gauge during your drive can help you identify potential issues before they become severe, allowing you to take action early and avoid extensive damage.
  • Question: How does the AISIN THT-004 compare to other brands?

    Answer: The AISIN THT-004 is known for its high-quality construction and reliable performance, often preferred over other brands due to its OEM (Original Equipment Manufacturer) status. This means it is manufactured to the same specifications as the original part, ensuring optimal fit and function. When comparing it to alternatives, consider factors like build quality, reliability, and compatibility with your specific model. Selecting a reputable brand like AISIN can provide peace of mind and better long-term performance for your cooling system.
  • Question: Is professional installation recommended for the thermostat?

    Answer: While experienced DIY enthusiasts may successfully install the thermostat themselves, professional installation is often recommended, especially for those unconfident in their mechanical abilities. A professional will ensure proper installation and configuration of the unit, reducing the risk of common mistakes that could lead to overheating or leaks. If you're unfamiliar with automotive mechanics, seeking expert assistance can save you time and potential repair costs in the future, resulting in a more efficient and effective installation.
  • Question: How does the thermostat affect fuel efficiency?

    Answer: A properly functioning thermostat ensures that your engine operates at the right temperature, which can enhance fuel efficiency. When the engine runs too cold due to a malfunctioning thermostat, it can lead to incomplete combustion, resulting in higher fuel consumption. Conversely, an overheated engine can cause performance issues, also negatively impacting fuel efficiency. By maintaining an optimal operating temperature, the AISIN THT-004 helps ensure your vehicle runs efficiently, thus optimizing fuel usage for drivers.
  • Question: Can I buy the AISIN THT-004 Engine Coolant Thermostat in Bahrain?

    Answer: Yes, you can purchase the AISIN THT-004 Engine Coolant Thermostat with Housing and Gasket in Bahrain. A great option for buying this product is Ubuy, where you can find a variety of automotive parts, including this specific thermostat. Ubuy offers a user-friendly experience for searching and ordering the products you need, making it a convenient choice for car maintenance and repair needs. You can visit their website to explore more and make your purchase easily.
  • Question: What materials are used in the AISIN THT-004 Engine Coolant Thermostat?

    Answer: The AISIN THT-004 Engine Coolant Thermostat is crafted from high-quality materials, typically featuring a durable plastic housing and a metal thermostat element designed to withstand the heat and stresses of engine operation. This combination provides excellent longevity and performance, ensuring reliability even under extreme conditions. Selecting a product made from reliable materials not only enhances performance but also reduces the frequency of replacements, making it a smart choice for maintaining your vehicle's cooling system.

AISIN Thermostats Editorial Review

AISIN GENUINE THT-004 Engine Coolant Thermostat with Housing and Gasket - Compatible with Select Lexus GS300, GS350, GS450h, IS250, IS300, IS350, RC300, RC350 is a reliable OEM part that offers perfect fit and function for various Lexus models. Customers appreciate the effectiveness of this thermostat, noting that it restores proper temperature control, as seen in reviews highlighting how it resolved stuck open thermostat issues in older models. Users noted that it matches the original part closely, reinforcing trust in AISIN's quality as an OEM supplier. It's essential to handle the installation carefully, as mentioned in one review, and to follow recommended torque specifications to avoid potential issues.

Customer Reviews & Ratings

1 customers ratings
  • 5 Star
    100%
  • 4 Star
    0%
  • 3 Star
    0%
  • 2 Star
    0%
  • 1 Star
    0%

Review this product

Share your thoughts with other customers

Pros

  • OEM quality ensures reliable temperature regulation
  • Fits various Lexus models perfectly
  • Easy installation with proper guidelines
  • Minimal risk of leaks reported
  • Trusted brand known for durability

Cons

  • Installation may require some creativity to access parts

Platform Trust & Buyer Confidence

trustpilot logo
4.6/5 148 reviews
Read reviews
MB
Maryam
Verified buyer

“The order arrived fast and in perfect condition”

2 June 2026 · via Trustpilot
T
trusttaker
Verified buyer

“I loved it. That was my second order, and I am already thinking of placing a third order.”

16-Jul-26 · via Trustpilot
HA
Haitham
Verified buyer

“Trusted merchant”

11 July 2026 · via Trustpilot
MA
Mohammad
Verified buyer

“Excellent quality and very fast delivery, I really appreciate your service, when you work good I will appreciate that, I am very satisfied , thank you”

13 June 2026 · via Trustpilot
LA
Lulwa
Verified buyer

“I like the package arrived safely”

17 June 2026 · via Trustpilot
Secure Checkout Global Delivery Easy Returns Genuine Products

Product Price History

Important information

  • Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
  • Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

BHD 17

Order now and get it around Thursday, September 10

QTY:

Secured transactionsecured transaction

PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

Our Top Logistics Partners
  • fedex
  • dhl
  • aramex
Fastest cross-border delivery

Ubuy Assurance

Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.