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Quick Specs

  • Size:2-1/16" (52.4mm)
  • Type:Digital Stepper Motor
  • Range:8:1-18:1 AFR
  • Lighting:LED
  • Instructions: Download PDF


Mirroring the functions of AutoMeter’s Street Wideband, the Digital Stepper Motor Wideband provides the most important functions necessary to make sure you’re extracting the most power possible, safely. An analog needle display integrates seamlessly with other gauges and easily illustrates rate of change as well as the actual value. Our advanced auto calibration system automatically calibrates your gauge on every startup to assure you of the highest degree of accuracy over the entire lifespan of your sensor (no free air calibration is ever necessary). Designed for gasoline applications, this wideband gauge provides the same degree of accuracy and response as the Pro version, but at a reduced cost. Data logging output is included for one wire or two wire systems. Our specially designed O2 sensor and wiring harness are included for ease of installation.
Feature Points
  • Modern blue LED through-the-dial lighting provides clear visibility during nighttime use
  • Gauge kit includes custom tuned .1 AFR Resolution Bosch LSU4.2 Sensor, 8ft. wiring harness, 304 stainless steel weld-in bung, mounting hardware, and detailed instructions for installation
  • AutoMeter’s race proven digital stepper motor electric instruments provide unmatched accuracy which is further increased by utilizing a self calibration sequence during power up
  • Display range of 8:1 to 18:1
  • Suitable for use with gasoline powered engines
  • 12 and 16 volt compatible, compatible with nearly every street car or race car electrical system
Ships With
  • Includes Sending Unit: 2243
  • M18X1.5 Fitting and Plug
  • Wire Harness: 5298
  • 2230
California Residents: Prop 65 WARNING prop65 Cancer, Birth Defects and Reproductive Harm



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I have a roadrace 69 boss 302 mustang. Has a Holley 850 cfm fully adjustable race carb. Which of these AFR wideband gauges will allow me to fine tune without a computer ? 6178 or 6171 ?

Asked by: supershifter2
Either of the gauges will allow you to fine tune the vehicle.
Answered by: Steve from AutoMeter
Date published: 2022-06-15

Does this gauge also connect back to the ECU on a 2008 Jeep Grand Cherokee SRT8 so the AFR is visible to the computer and part of the data logging when using HPTuners? This is my setup so I want to make sure it can it is visible to tuning software. Thx.

Asked by: Metal Health
Thank you for your inquiry. This gauge has a 0 to 4 volt output than can send data to an engine management or data acquisition system.
Answered by: Jim from AutoMeter
Date published: 2020-04-01

Curious if I have a 383 stroker with a carb, is this a necessary gauge for a carb’d motor?

Asked by: Nick129
Thank you for your question. It would not be considered necessary, but it can still be used. You may not be able to fine tune it as much as you would an electric system, but you can certainly still use it for some slight tuning on a carb application.
Answered by: Zach from AutoMeter
Date published: 2019-04-19

Hello could you tell me the conde color that usted conected to the o2 sensor my harness was damaged and I need yo conect it wire by wire

Asked by: Joshua c
Hi Joshua, thank you for reaching out to us. The gauge side and sensor side pinouts for the 6171 can be found here:
Answered by: Matt from AutoMeter
Date published: 2019-01-10

Will this work on my 2003 Cobra

Asked by: Dust
Thank you for your question. None of your gauges are vehicle specific, so this gauge should certainly work for your application.
Answered by: Zach from AutoMeter
Date published: 2018-11-27

I recently bought an AutoMeter Wideband Gauge #6171 at Ebay , but the needle in the gauge is not marking zero. All others that are for sale on eBay have the needle at zero. Could it be that the gauge is damaged? Thanks for all your attention.

Asked by: amorera
Thank you for your question. With the gauge not hooked up at all, it is not uncommon for the gauges to not be on zero. With power applied, the gauge should go to zero.
Answered by: Zach from AutoMeter
Date published: 2018-10-30

What is the difference between these gauges? They all look alike. #3370, 3670, 3870 and 6171. Thanks, Tom

Asked by: thom
Hi Thom, thank you so much for contacting us. Functionally, these are all basically the same. They use the same O2 sensor and the same basic meter movement. The differences are all cosmetic. 3370: Opaque dial, incandescent bulb lighting, floods around the edge of the dial, brushed bezel 3670: White LED "through the dial" back lighting for excellent visibility, lit pointer, brushed bezel 3870: Green LED "through the dial" back lighting for excellent visibility, lit pointer, mid polished bezel (shiny but not full chrome) 6171: Blue LED "through the dial" back lighting for excellent visibility, lit pointer, mid polished bezel (shiny but not full chrome)
Answered by: Joseph At AutoMeter
Date published: 2018-07-07

Can this gauge be used with E85?

Asked by: John D.
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