Bosch (LSU 4.2) Wideband O2 Sensor Only

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This sensor is designed to measure the proportion of oxygen in exhaust gases of automotive gasoline engines. The wide band lambda sensor LSU 4.2 is a planar ZrO2 dual cell limiting current sensor with integrated heater. Its monotonic output signal in the range of lambda 0.65 to air makes the LSU capable of being used as a universal sensor for lambda 1 measurement as well as for other lambda ranges. The connector module contains a trimming resistor, which defines the characteristic of the sensor. The main benefit of the LSU is the very robust design combined with the high Bosch production quality standard.

Installation Notes
The lambda sensor should be installed at point which permits the measurement of a representative exhaust -gas mixture, which does not exceed the maximum permissible temperature.
Install at a point where the gas is as hot as possible.
Observe the maximum permissible temperature.
As far as possible install the sensor vertically (wire upwards).
The sensor is not to be fitted near to the exhaust pipe outlet, so that the influence of the outside air can be ruled out.
The exhaust-gas passage opposite the sensor must be free of leaks in order to avoid the effects of leak -air.
Protect the sensor against condensation water.
The sensor is not to be painted, nor is wax to be applied or any other forms of treatment.
Use only the recommended grease for lubricating the thread.