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Integrated Thermostat Housing Assembly; 180-Degree (03-24 4.0L 4Runner)Find parts that fit my vehicle

Item TR43963
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$40.99 each

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      Product Information

      Features, Description, Q&A, Specs & Installation

      Features

      • Thermostat Housing Assembly
      • Integrated 180-Degree Design
      • Offset With An Air Relief Valve
      • Has Stock-Style Seals Where Applicable
      • Built Stainless Steel With A Copper Case And Wax Compound
      • Fully Tested And Calibrated
      • Direct Replacement
      • Comes In Singles
      • Fits 2003-2024 4.0L Toyota 4Runner models

      Description

      Precision Cooling. The Thermostat Housing Assembly for 2003-2024 4.0L Toyota 4Runner models integrates a 180-degree flow path with an offset air relief valve to optimize coolant circulation and eliminate trapped air pockets. This direct replacement unit restores proper engine thermostat operation, ensuring consistent warm-up times and peak operating temperature control. Its robust design helps maintain engine performance and longevity under varied driving conditions.

      Construction and Appearance. Crafted from durable stainless steel and featuring a precision-machined copper case, this assembly combines corrosion resistance with excellent thermal conductivity. The wax compound thermostat is fully tested and calibrated to open at the exact temperature specified by Toyota engineers. Stock-style seals at all interfaces guarantee leak-free performance, and the polished metal surfaces resist pitting and degradation over time, providing a long-lasting, factory-quality finish.

      Installation. As a true direct replacement part, installation requires only basic hand tools and the removal of the original housing. After draining a portion of the coolant, unbolt the old assembly, clean the mounting surface, and install the new housing using the supplied seals. The offset air relief valve allows for quick bleeding of trapped air during refilling. Tighten fasteners to factory torque specifications and refill with the recommended coolant mix. Even first-time installers will find the process straightforward, restoring leak-free operation in under an hour.

      Application. This Thermostat Housing Assembly fits 2003-2024 4.0L Toyota 4Runner models. It enhances vehicle reliability by ensuring accurate temperature regulation, preventing overheating, and reducing strain on the cooling system. The precise calibration and robust materials help maintain consistent engine temperatures, improving fuel efficiency and reducing thermal wear over the life of your 4Runner.

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      Installation & What's in the Box

      Installation Info

      Installation Time

      (approx) 1 Hour

      Difficulty Level:

      Simple installation for anyone.

      Installation Guides

        No guide available for this part yet.

      What's in the Box

      • (1) Thermostat Housing Assembly

      Questions & Answers

      No questions about this product yet. Ask the First Question

      Will It Fit My 4Runner

      • 40th Anniversary Edition - 23
      • Limited - 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
      • Nightshade - 20, 21
      • Sport - 03, 04, 05, 06, 07, 08, 09
      • SR5 - 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
      • SR5 Premium - 18, 19, 20, 21, 22, 23, 24
      • Trail - 10, 11, 12, 13, 14, 15, 16, 21, 22
      • TRD Off-Road - 17, 18, 19, 20, 21, 22, 23, 24
      • TRD Off-Road Premium - 18, 19, 20, 21, 22, 23, 24
      • TRD Pro - 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
      • TRD Sport - 22, 23, 24
      • Venture - 20, 21

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