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SM-AFR Wideband DM-6 Gauge Combo (Gen4)
Wideband O2 Touch Screen Multi Guage for Air/Fuel Ratio

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Trusted by tuners.
Since 2003 PLX widebands have tuned engines worldwide to run cleaner, operate more efficiently, and produce more power. Patented.

  • Fast and accurate - PLX widebands employ PID critically damped technology, are individually tested, and are accurate to less than 0.1AFR.

  • Plays nice - Works with gasoline, diesel, methanol, ethanol, LPG, Diesel, E85. 0-5V analog output interfaces with 3rd party ECU’s and data loggers.

  • Monitor sensor health - Proprietary IntelliHealth algorithm detects your sensor’s remaining life and reaction time.

  • Fully plug and play - Installation requires no manual calibration – simply install your sensor, connect the wire harness, and apply power.

  • Digital sensors - All sensor modules have a built in microprocessor designed display quick, accurate, ultra high resolution sensor readings.
Combo includes: multi-touch gauge, controller box, Bosch LSU4.9 sensor, sensor harness, and wire/connector kit. Don't forget to add an O2 bung or backup oxygen sensor.

Price: $279.99
Sale Price: $209.99
Savings: $70.00

Availability: Usually Ships in 6 to 8 Weeks
Product Code: 897346002719

Description Technical Specs Extended Information

User Manual

User Manual


We're proud to introduce our next generation wideband oxygen sensor controller with intelligent health monitoring technology and current for improved sensor performance. Our new Gen4 Wideband AFR Gauge Combo utilizes the next generation in Bosch Wideband Air/Fuel Ratio sensor technology. The Gen4 is faster, more accurate, more durable, and uses less power than the Gen3. The Gen4 also employs the innovative PLX Devices new intelligent health monitoring technology where the oxygen sensor is meticulously monitored every 2mS (488 times per second) to obtain peak performance, accuracy and reaction time. Coupled with the updated patented DM-6 touch screen MultiGauge, battery voltage is displayed from 9V-20V, sensor life is displayed from 0-100%. The oxygen sensor reaction time is displayed from 10mS/1000mS on the brilliant high contrast OLED display.

The PLX Wideband AFR (UEGO) gauge combo combines an accurate, fast response wideband AFR (Air Fuel Ratio) controller with the world's most advanced touch screen 2 1/16" gauge (52mm). It includes a Bosch LSU4.9 wideband oxygen sensor. The wideband controller (SM-AFR) works with gasoline, bio diesel, ethanol, methanol, E85, LPG, and CNG. It includes two analog outputs (wideband 0-5V, and narrowband 0-1V) for interfacing with 3rd party devices and one digital serial output for interfacing with the DM-6 gauge and other Multi Gauges. The wideband analog output is ideal for interfacing with aftermarket ECU's and data loggers. The narrowband output is ideal for stock narrowband oxygen sensor replacement where the simulated narrowband analog output is fed back into your ECU to make it operate as if the stock narrowband oxygen sensor is still installed while running the PLX wideband setup. All three outputs can be used simultaneously. Additional features include advanced soft start technology which prolongs the oxygen sensor's life.

Gen3 vs. Gen 4
  • More accurate
  • Uses only 7.5Watts compared to 10Watts
  • Faster response time
  • Improved sensor durability
  • Faster warm up time
  • Maintains accuracy throughout life
  • Less susceptible to contamination to surrounding pollution
  • 10+ years of average service life

*Due to continuous product improvements, actual product may differ slightly from photos/videos.

New Sensor: Improved reliability, reaction time, warm up time, and reduced power consumption New Parameters: O2 Sensor Health, O2 Sensor Reaction Time, Voltage New Bosch LSU 4.9 Sensor Plug and play controller and gauge combo No Calibration Required Soft start technology 2 analog outputs 1 digital input, 1 digital output Compatible with multiple fuels Accurate to 0.1 AFR resolution (gasoline)

Included Items:
SM-AFR wideband O2 controller main unit
DM-6 2 1/16" gauge with multi-touch
Genuine Bosch LSU 4.9 wideband sensor
O2 sensor harness 10ft
Sensor Module Connect Kit (4ft power wire with 2.1mm connector, 4ft Analog wires and connector with 4 terminals, 1ft Serial Cable, 4 Pin connector for SM-AFR connectivity, 2 Terminals for 4 pin Connector)
Termination jumper
User Manual
*O2 Bung and Cap Sold Separately

DM-6 2 1/16" Touch Screen Multi-Gauge SM-PRO - Combined Sensor Module Array MultiGauge Link 3.5mm Y Splitter Cable 2 1/16" (52mm) Gauge Holder
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2 1/16" Touch Screen MultiGauge | For All Sensor Modules SM-PRO Combined Sensor Module Array MultiGauge Link 3.5mm Y Splitter Cable Auto Gauge Ring Mount (2 1/16" 52mm) for Wideband O2 OBD2 Sensor
Bosch LSU4.9 Wideband Oxygen Sensor MultiGauge Link Adapter Bosch LSU4.9 Sensor Harness M18 x 1.5mm O2 Sensor Bung Plug
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Bosch LSU4.9 Wideband Oxygen O2 Air Fuel Ratio Sensor MultiGauge Link for Smartphone Interface with PLX Devices Sensor Modules Bosch LSU4.9 Wideband Oxygen O2 Air Fuel Ratio Sensor Harness Oxygen Sensor Bung Fitting and Plug (Weld In)
MultiGauge App for Apple/Android M18 x 1.5mm O2 Sensor Bung Sensor Module Connect Kit

Sale Price: $8.99

Sale Price: $16.49

MultiGauge App OBD Car to Smartphone Software Weld In Oxygen Sensor Bung Fitting M18 x 1.5mm Wideband O2 OBD2 Sensor Module Connect Kit with Serial & Analog Cable

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 1 Write a review »

  8 of 8 people found the following review helpful:
5 of 5 Fan since 2005 September 18, 2016
Reviewer: Paul Black from CA, United States  
I've been using my PLX wideband for 7 years now and my setup still works great. The O2 sensor still responds quickly and my wideband controller functions flawlessly evertime. I'm using the narrowband output from my controller to feed back into my ECU for simulated narrowband operation so I don't have to install another bung. It's neat to see the closed loop operation on my gauge. My fuel efficiency is excellent signaling that my systems are running at optimum. Great product!

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