Bosch LSU4.9 Wideband Lambda Sensor + Connector

The Bosch LSU4.9 Wideband Lambda Sensor is a high-precision oxygen sensor designed for measuring the proportion of oxygen in automotive engine exhaust gases, including those from gasoline and diesel engines. It features a planar zirconium dioxide (ZrO2) dual-cell design with an integrated heater.

The LSU4.9 is known for its monotonic output signal, enabling it to measure a wide range of air-fuel ratios (lambda values) from 0.65 to air (infinite lambda). It is widely used in modern engine management systems and data loggers.