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Product # 4379

  • 2-1/16" (52.4mm)
  • Digital Digital
  • 10:1-17:1 AFR
  • Digital LED
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Taking the core features from AutoMeter’s Pro Wideband, the Street Wideband provides the most important functions necessary to make sure you’re extracting the most power possible, safely. 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

  • 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
  • 0-4v data output feed for ECU, data acquisition unit, or Laptop tuning
  • Suitable for use with gasoline powered engines
  • Digital segment display and LED radial bar graph display
  • 12 and 16 volt compatible, compatible with nearly every street car or race car electrical system

Sending Units

  • 2243


  • M18X1.5 Fitting and Plug

Wire Harness

  • 5298

Mounting Hardware

  • 2230
2-1/16" WIDEBAND STREET AIR/FUEL RATIO, 10:1-17:1 AFR, ULTRA-LITE is rated 5.0 out of 5 by 2.
Rated 5 out of 5 by from Great product Very cool. I love how accurate it is. Very easy install
Date published: 2019-03-12
Rated 5 out of 5 by from looks very nice, works well I bought the a/f gauge a month ago , and it looks and works great. It was very easy install , good instructions. I am very happy, and it compliments my factory Mazdaspeed Miata gauges well. I mounted it in my glove box with an Autometer boost gauge , and will be adding water temp, and oil pressure. It looks great when I open the glove box at night. It makes a nice addition to my car. Thanks
Date published: 2019-05-02
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can i just buy the guage without the wire harness

Asked by: roberto123
Thank you for your question. Unfortunately, we do not offer just the gauge head by itself. If yours is having issues, you can send it in to us for service with the information on this form: https://www.autometer.com/media/Service_Form.pdf
Answered by: Zach from AutoMeter
Date published: 2019-08-28

Mine only goes form 10 to 16. I'm assuming it is because it's an older model? Can I still get it serviced? Some of the number portions are starting to go out.

Asked by: Watts
Thank you for your question. You can always send in your AutoMeter products for service if they are having issues. We will evaluate them when we receive them and then contact you with what options we have available as far as repairing or replacing your unit as well as any associated costs. The evaluation itself is done for no charge, all you need to do is get the gauge in to us. Any repair or replacement we offer may have an additional cost, however, you can always decline all the options and we will send the unit back to you in the same condition that we received it. The older the unit is, the less likely it is that we can repair it, but we are always willing to look at it and see what we can do. You can find a form with the information for sending in a product for service here: https://www.autometer.com/media/Service_Form.pdf
Answered by: Zach from AutoMeter
Date published: 2019-06-21

will the a/f ratio ,wideband,digital gauge part # atm-4379 work with old school engines by welding a bung in the exhust header and making the connection no computer just tuning the carburetor manually. being a digital gauge whats the life span ?

Asked by: EDDIE 94
Thank you for your question. Yes, this can be used if you weld in a bung in the exhaust. A lot of factors go into the lifespan and it will vary per application. The gauge has a 1-year warranty but we certainly stand behind it much longer than that. We would expect the gauge to last many years.
Answered by: Zach from AutoMeter
Date published: 2019-05-11

Do you sell longer wiring harnesses for this product

Asked by: Tyler819
Thank you for your question. Yes, harness #5252 is 25ft and works with this gauge.
Answered by: Zach from AutoMeter
Date published: 2019-04-05

Does the wideband & gauge illuminate when the cars parking/headlights are turned on ? My gauge works great but this is the 1st time I’ve drove at night & it doesn’t light up like all my other autometer gauges do ?? It’s only about 6 months old also 

Asked by: Big red rolling thunder
Thank you for your question. Due to the unique way these gauges are assembled, the placement of the LEDs and the way the circuit board is composed, there is no other form of back lighting besides those LEDs. Unfortunately, the gauge will not illuminate any more than the LEDs on the display.
Answered by: Zach from AutoMeter
Date published: 2018-09-24

Is there any way possible that I can buy just a pro comp afr digital gauge I bought one like a year ago and the digits numbers are starting to disappear 

Asked by: Roberto sohc
Hi Robert, thank you for the question. We only sell our wideband air/fuel ratio gauges as a kit with the harness and sensor. We do service our gauges and you can send in your gauge for evaluation and service. While this form isn't required, this is the type of information you'll want to include along with an invoice or receipt if the product is within or near the 1 year warranty period: http://www.autometer.com/media/Service_Form.pdf
Answered by: Matt from AutoMeter
Date published: 2018-08-26

I have this gauge and it wasn't working this year. I got it working yesterday. Asy first it would just flash e02. Eventually it started working but it doesn't seem very accurate. What does e02 mean? Do I need a new sensor?

Asked by: Ed1234
Thank you so much for contacting us. The E02 code typically means there is a connection issue between the gauge and the sensor. This could be damaged wiring, a pin in a connector that isn't seating properly or can also be caused by using a non AutoMeter oxygen sensor. I would recommend checking the wiring first. If you've got other questions, I strongly recommend contacting out tech team at 866.248.6357, hitting the Chat link at the top of the page or emailing us here: http://www.autometer.com/resources/index/ask_a_question Hope this helps!
Answered by: Joseph From AutoMeter
Date published: 2018-09-04
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