Industry leading throttle position sensor ( TPS ) manufacture in the automotive aftermarket. Walker Products TPS sensor is Manufactured for OE Fit, Form, and Function that it is worry free installation and performance you can trust Walker Products TPS sensor is Manufactured for OE Fit, Form, and Function that it is worry free installation and performance you can trust Symptoms of failure include poor starting, improper automatic transmission converter lockup, engine stumbling, stalling, and or a check engine light. There is no scheduled service for TPS sensors, sensors are non-serviceable and must be replaced when failure occurs OE Interchange: YS4Z9B989BB 988F9B989BB 1F2018851 Fit: 2000-2011 Mazda B2300, Ford Escape, Ford Focus, Mercury Mariner, Ford Ranger