Bosch 003-542-71-18 Wideband Oxygen Sensor

The Bosch 003-542-71-18 (OEM 0035427118, Bosch 17019) is a premium wideband air/fuel ratio oxygen sensor engineered for precise emission control and fuel economy optimization. This OE-identical sensor utilizes advanced wideband sensing technology to accurately measure the exact oxygen content in exhaust gases rather than simply switching between rich and lean conditions, providing the vehicle's ECU with proportional feedback for superior engine management.

Key Features:

• 5-wire heated sensor design with zirconium sensing element
• 18mm thread diameter with pre-applied anti-seize compound
• 31.5-inch (800mm) wire harness with OE-type direct-fit connector
• Voltage range: 0-5V for precise air/fuel ratio measurement
• Double laser-welded stainless steel body for complete submersion protection
• 100% functional quality tested with seared protection tube
• Threadable mounting for secure installation

Bosch invented the automotive oxygen sensor and remains the world's leading OE supplier. Each sensor undergoes rigorous quality testing to ensure optimal performance, reduced emissions, and improved fuel economy. The robust sensor design and sealed construction protect against harsh exhaust conditions for extended service life. Cross-references: 0035427118, 0045423618, A0035427118, 17019, 0258017018.