Bosch LSU4.9 Lambda Sensor 0258017025

This wide band lambda sensor LSU 4.9 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 4.9 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.

Technical Specifications

Measurement range -  Lambda 0.65 to ∞

Fuel compatibility - Gasoline/Diesel/E85

Exhaust gas pressure - ≤ 2.5 bar (higher with decrease accuracy)

Exhaust gas temperature range (operating)  - < 930°C

Exhaust gas temperature range (max.) for short time - < 1,030°C

Hexagon temperature - < 600°C

Wire and protective sleeve temperature - < 250°C

Connector temperature - < 140°C

Storage temperature range -  -40 to 100°C

Max. vibration (stochastic peak level) - 300 m/s2

Electrical Connections

Mating connector - BOSD261205356-01

Installation Notes

This lambda sensor operates only in combination with a special LSU-IC, used in most aftermarket Motorsport ECUs and lambda control units like our 60-610A or 60-611A Lambda modules.

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.