Best Seller! The DM-6 + SM-AFR Gen4 Gauge Combo is a tuner grade Bosch LSU 4.9 wideband oxygen sensor controller with 2 1/16" touch screen gauge. Accurately reads the air/fuel ratio of any internal combustion from 0.68 Lambda to 1.36 Lambda (10:1 - 20:1 AFR *Gasoline). Fully plug and play, no sensor calibration is required. Compatible with Gasoline, Diesel, Ethanol, Methanol, E85, LPG, CNG. Accurate to 0.1AFR with less than 100mS reaction time from rail to rail. Advanced sensor health monitoring, displays oxygen sensor health and reaction time on the DM-6 gauge.

The SM-AFR Gen4  is a tuner grade Bosch LSU 4.9 wideband oxygen sensor controller with digital/analog outputs for 3rd interface. Accurately reads the air/fuel ratio of any internal combustion from 0.68 Lambda to 1.36 Lambda (10:1 - 20:1 AFR *Gasoline). Fully plug and play, no sensor calibration is required. Compatible with Gasoline, Diesel, Ethanol, Methanol, E85, LPG, CNG. Accurate to 0.1AFR with less than 100mS reaction time from rail to rail. Advanced sensor health monitoring, displays oxygen sensor health and reaction time when connected to DM-6 gauge.

The DM-6 Multi Gauge Display Module is an OLED automotive gauge designed to display the measured values from your PLX Sensor Modules. Measuring only 0.7" (18 mm) thin, it can be mounted virtually anywhere. The DM-6 Multi Gauge is designed to fit into most aftermarket 2 1/16" (52 mm) cups, and can be mounted for seamless integration into your vehicle. Utilizing new touch screen sense technology, buttons are a thing of the past. Navigate your gauge and menus with ease by touching the bezel of the gauge. An ideal accessory for your PLX Sensor Modules. Connect to a Multi Gauge with OBD II for even more information than any standard gauge.

For use with DM-6, DM-100 OBDII, DM-100 Touch. The 2 1/16" (52mm) gauge ring mount offers the perfect mounting solution for those that do not wish to drill into their dashboard or install a gauge cluster. This 2 1/16" gauge ring mount will fit any standard sized 2 1/16" gauge and also includes double sided tape for installation.

For use with all Sensor Modules. The sensor module connect kit can be used with any PLX sensor modules. It contains a molex connector, power cable, serial cable, analog output cable, and three termination pins.

Genuine Bosch LSU 4.9 wideband oxygen sensor is a 5 wire sensor with a built-in calibration resistor with an M18 x 1.5 thread. This is the industry standard sensor for tuning internal combustion engines of various fuel types (gasoline, diesel, ethanol, methanol, LPG, CNG, E85). The wideband oxygen sensor is sometimes referred to as a lambda sensor or UEGO. It is the ideal sensor to be used with all PLX Wideband Controllers. Each sensor is hand tested by a PLX technician to verify its accuracy and precision. For use with PLX Gen4 or later Widebands ONLY.


Compatible with PLX Devices Wideband Gen4 and later
Compatible with Walker P/N 250-25036, 250-25075
Compatible with Bosch P/N 0258017025, 0258017271, 0281004028, 0258017036

The O2 sensor harness connects the PLX Wideband Controller with a Bosch LSU4.9 sensor. It includes a 6 position molex mini fit jr male plug on one end and a standard 6 position Bosch LSU4.9 connector on the other end. The cable is 10ft (3m) long and is made in USA. For use with PLX Gen4 or later Widebands ONLY.

The oxygen sensor bung is a must have accessory for installing your wideband oxygen sensor to your exhaust pipe. Its steel alloy makes it easy to weld. The thread is an M18 x 1.5mm pitch. Works with Bosch LSU4.2, Bosch LSU4.9, NTK/NGK L1H1, NTK/NGK L2H2 wideband oxygen sensors.

The oxygen sensor bung plug is the ideal accessory for use with our oxygen sensor bung when your wideband oxygen sensor is not in use. The thread is an M18 x 1.5mm pitch.

The new PLX Wideband AFR Smartphone combo takes engine efficiency to the next level. Our Wideband SM-AFR controller coupled with the new MultiGauge Link™ allows you to wirelessly send data to any smart device eliminating the need to install dedicated gauges in your vehicle. Simply launch the MultiGauge™ app, available now for Apple and Android, to instantly connect to your smart device for brilliant real-time gauges.

For use with connecting to the output for Sensor Module serial transmit (TX) to feed both DM-6 gauge and MultiGauge Link simultaneously.

This MultiGauge App is designed to function with the PLX Devices Multi Gauge Link hardware interface. The Multi Gauge Link includes a Bluetooth LE wireless communication protocol designed to work seamlessly with this app. PLX Devices sensor modules can be connected in a daisy-chain and the Multi Gauge Link is connected to the last sensor module in the chain to transmit sensor data to your smart phone for visual display.

SM-Pro is a combined sensor module for accurately measuring Vac/Boost, Exhaust Gas Temperature, Air Intake Temperature, Fluid (Oil/Water) Temperature, and Fluid Pressure with a digital output for interfacing with DM-6, Multigauge Link Smartphone gauges and analog outputs for 3rd party interface with ECU's and data loggers.