Bosch 11-78-8-631-047 Wideband Oxygen Sensor

The Bosch 11-78-8-631-047 is a premium wideband oxygen sensor designed for direct replacement on select BMW vehicles. This OEM-quality sensor features a heated 5-wire design that provides precise air-fuel ratio measurements to the engine control unit, ensuring optimal combustion efficiency, reduced emissions, and improved fuel economy.

Key Features:

• Heated oxygen sensor with 5-circuit wiring for faster warm-up and accurate readings
• Overall length of approximately 23 inches (582mm) with pre-catalytic converter mounting position
• Direct-fit replacement with factory-style connector for hassle-free installation
• Constructed with high-temperature resistant materials and advanced ceramic elements
• Recommended service interval of 250,000 km for long-lasting performance
• Cross-references to Bosch part number 0258027103

Bosch oxygen sensors utilize advanced zirconia ceramic element technology to deliver consistent performance under harsh thermal and vibration loads. As the inventor of the oxygen sensor in 1976, Bosch brings over four decades of OE development expertise to ensure accurate lambda measurements and reliable engine management system communication.