APSG Genuine 90916-A3003 Thermostat with Gasket | OE 82°C Engine Coolant Thermostat | Lexus/Scion/Toyota | USA/Japan

Keep your engine cooling on track with the APSG Genuine 90916-A3003 Thermostat with Gasket. This OE-style thermostat is designed for select Lexus, Scion, and Toyota models and features an 82°C (179.6°F) rating to help regulate the flow of coolant as the engine warms up and during steady driving.

Manufactured to meet or exceed OEM specifications, the component combines durable construction with precise temperature control for reliable operation over time. The included gasket simplifies installation and helps ensure a proper seal when mounted to the engine block. The part is produced for markets in the USA and Japan, reflecting a cross-border approach to materials and quality control that supports long-term cooling system health.

Key benefits

• Genuine OEM part: 90916-A3003 with gasket for a trustworthy replacement
• Compatibility: designed for Lexus, Scion, and Toyota vehicles that require an 82°C thermostat
• Temperature rating: 82°C engine coolant thermostat to promote steady engine temperature
• USA/Japan made: built with materials sourced in Japan and assembled in the USA
• Thermostat function: regulates coolant flow for balanced warmth and cooling cycles

Real-life use cases

• Performing cooling system maintenance on aging vehicles to restore consistent temperature behavior
• Applying to hot climates where reliable temperature regulation helps prevent overheating during extended drives
• Replacing a worn part to support smooth warm-up and stable engine operation on daily commutes

Installation notes: follow the recommended OEM torque specs and use proper gasket sealing to achieve a proper fit and seal. If you are unsure about the process, consider professional installation to protect your cooling system and ensure proper alignment.

Why choose APSG?

APSG parts are designed to meet or exceed OEM standards, delivering dependable performance for routine maintenance and replacements. The 82°C threshold aligns with common cooling system specifications, making it a practical choice for many Toyota-based platforms. This thermostat supports consistent warm-up and steady cooling cycles that help your engine reach and maintain its ideal operating range.

Quality and testing: Each unit is crafted to tolerances that help ensure a precise seal and reliable operation over time, reducing the chance of leaks and temperature fluctuations in everyday driving scenarios.