- VEHICLE FITMENT: Compatible with 2005-2006 STS 4.6L models, ensuring a precise fit for your vehicle. - OE PART NUMBER: 5WK9650. This Mass Air Flow Sensor Meter is manufactured to meet OEM standards and undergoes rigorous factory inspections for optimal performance. - MAIN FUNCTION: The Mass Air Flow Sensor accurately measures the amount of air entering the engine, providing critical data to the ECU. This ensures the right air-to-fuel mixture, resulting in benefits such as stable idle speeds, improved fuel efficiency, and a reliable plug-and-play installation. - INSTALLATION ATTENTION: For best results, ensure the air box is clean and free of debris. Clear any error codes and turn off the ECU before installation. Disconnect the harness connector prior to fitting the new air flow meter. - USE SCENARIOS: 1. Ideal for replacing a faulty sensor to restore engine performance and efficiency. 2. Perfect for tuning enthusiasts looking to enhance engine responsiveness and fuel economy. 3. A reliable choice for maintaining optimal vehicle performance during routine maintenance. Enhance your driving experience with this high-quality Mass Air Flow Sensor, designed to provide exceptional performance and reliability for your STS.