Description
The gauges are currently in development and will be ready to ship by mid January 2026
This wideband controller requires no wiring! It simply plugs into the rear (or front) oxygen sensor connector. The ECU will control power to the controller using the oxygen sensor pre-heater circuitry and receive the measured air to fuel ratio via the oxygen sensor input channel.
This controller comes with a genuine Bosch LSU4.9 sensor and an optional wireless display. There are two options for the display – a rectangular 2.3″ x 1.8″ OLED or a 52mm round LCD. Both screens connect to the controller wirelessly and are powered via a USB-C connection. The screen does not need to powered on for the wideband controller to function.
Since the wideband sensor’s power is controlled by the ECU, the sensor will only start pre-heating after the engine has started. This prevents the most common failure mode of aftermarket installed wideband sensors – thermal shock of the ceramic sensing element. If a the sensor is pre-heated prior to engine start, cold water from the engine will hit the hot sensor and cause the sensing element to crack.
This controller uses an extremely accurate and robust all digital control strategy, with a very fast response time of 10ms.
In order for this controller to be plug and play using the rear oxygen sensor connector, a modified tune must be flashed to the ECU and a single ECU pin bridged internally. The tune modification reconfigures the oxygen sensor pre-heater code so that the controller will receive power only while the engine is running. The solder bridge connects the oxygen sensor ground pin to common ground. For those who already have a tune from us, we will modify your tune to suit and modify your ECU, if ordered at the same time as a tune. If you’re tuning the car yourself or have someone else tuning the car, we will provide a tune patch free of charge.
When this controller is combined with wideband lambda control, it will completely replace the stock front oxygen sensor. While this controller comes with a factory rear oxygen sensor connector, it can be plugged into the front oxygen sensor connector by simply cutting the ‘key’ on the side of the connector.
