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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 green 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
  • 2243
  • M18X1.5 Fitting and Plug
  • 2230
California Residents: Prop 65 WARNING prop65 Cancer, Birth Defects and Reproductive Harm


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I have Smiths gauges in my Lotus, would it be possible along with a chrome bezel, to have a white needle to match all the other gauges?

Asked by: Lotuswins
Our custom shop is currently closed but we are still able to do some simple modifications to gauges. Please give us a call at 866.248.6356 and we can see if we are able to make the changes you are wanting to do.
Answered by: Alex at AutoMeter
Date published: 2022-05-02


Here is a link to the instructions: If you need something in addition to this or something physically mailed, please send us an email request.
Answered by: Matt from AutoMeter
Date published: 2022-02-14

Is this guage available with a more traditional incandescent bulb?

Asked by: AcampoDave
Not necessarily. Our regular Sport Comp Series may be the most comparable series that would feature traditional incandescent perimeter lighting.
Answered by: Matt from AutoMeter
Date published: 2022-02-04

Is it possible to just purchase the gauge without the harness and sensor? Thanks

Asked by: RickC
Thank you for your question. This is only sold as the kit.
Answered by: Natalia from AutoMeter
Date published: 2021-02-04

Can this gauge come with a black bezel?

Asked by: Cookie
Thank you for your question. This does not come with a black bezel, but model #5970 has a black bezel and might be closer to what you're looking for.
Answered by: Natalia from AutoMeter
Date published: 2021-01-06

is this gauge available in a 2 5/8" version with traditional classic bezel

Asked by: Carnut1cars
Thank you for your question. Unfortunately this is only available in a 2-1/16". As for the bezel it is not able to be changed since the traditional chrome bezel does not fit this gauge. For further assistance please call our tech line at 866-248-6357.
Answered by: Steve from AutoMeter
Date published: 2019-12-16

Is this air / fuel gauge available with a chrome bezel that matches your traditional gauge series? I have your traditional mechanical gauges and am wondering if I can get this gauge to match. - Ben

Asked by: Stickman
Hello Ben, thank you for your question. Yes, you can special order product #3870 to have a chrome bezel. Please call our customer service department at 866.248.6356. They will be able to help you get this done and answer any further questions you may have.
Answered by: Zach from AutoMeter
Date published: 2018-09-25

Does this meter work with E85, where I need to read values around 9:1? Or do you recommend one that goes lower for use with E85?

Asked by: fg4_nate
Hi Nate, thank you for the question. The 3870 is certainly compatible, but the range isn't necessary ideal for E85. The digital Pro-Series, model 3878, will read down to 6:1 and the radial LED scale can be adjusted for alternative fuel types, like E85.
Answered by: Matt from AutoMeter
Date published: 2018-08-26
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