Bosch 11-78-7-523-435 Wideband Air/Fuel Ratio Oxygen Sensor

The Bosch 11-78-7-523-435 (part number 17215) is a premium wideband air/fuel ratio oxygen sensor engineered to deliver OE-identical performance and reliability. As the inventor of automotive oxygen sensors, Bosch supplies this sensor with the same quality trusted by vehicle manufacturers worldwide.

Advanced Wideband Technology:

• Sophisticated planar pump-cell design provides continuous, high-precision air/fuel ratio measurements across the full lambda range
• Delivers far more detailed information than traditional switching sensors for exceptionally accurate mixture control
• Fast light-off and optimized heater control ensures reliable performance during rapid load changes and harsh thermal cycles
• Heated 5-wire design reaches operating temperature quickly for improved sensor response and engine efficiency

Key Specifications:

• Thread diameter: 18mm with 22mm hex size
• Wire harness length: 38.5 inches (978mm)
• 5-wire heated sensor with OE-type connector
• Pre-coated threads with anti-seize compound for easy installation
• Robust ceramic construction with metal housing
• Threaded mounting type

Benefits:

• Optimizes engine performance and fuel efficiency by enabling precise air-fuel mixture control
• Reduces harmful emissions and supports proper catalytic converter function
• Direct-fit OE connector and harness for straightforward installation
• Helps resolve check engine light codes related to fuel trim and sensor performance (P0130, P0131, P0132, P0133, P0134)

This sensor is designed for rear exhaust manifold (bank 2) pre-catalytic converter applications. The precision-engineered design ensures accurate oxygen measurement in exhaust gases, allowing the ECU to maintain optimal combustion under all operating conditions. Cross-references to OEM part number 11787523435.