best wideband gauge

The Best Wideband Gauge 2019

Installing a wideband gauge allows you to keep track of your air to fuel ratio and ensure your car is running correctly. The AFR gauge is available as a narrowband alternative but the wideband is the best option as its more precise.

The best wideband gauge is the AEM 30-0300 X-Series, which has an AFR range of 8-20 and an intuitive digital display with interchangeable face plates.

If you are serious about your cars performance, adding gauges such as a wideband or turbo boost gauge is essential. The instant feedback allow you to make adjustments and monitor the performance at a quick glance.

Best Wideband Gauge

Wideband GaugeAFR RangeOutput
AEM 30-0300 X-Series8-200-5V
AEM 30-4110 UEGO10-200-5V
Innovate Motorsports MTX-L Plus7.35-22.390-5V
Auto Meter 4379 Ultra-Lite10-170-4V
GlowShift Elite 10 Color10-200-5V

The appearance, usability, ease of installation and compatibility are the main factors to consider. There is a wide range of gauges available but the best will tick every box.

Most gauges will allow you to tweak the functionality with programmable alerts or different LED colors. If you have made changes to your engine such as a cold air intake, supercharger and other modifications, installing a wideband is recommended.

Below is a list of the best wideband gauges that provide an easy to read digital display with the ability to make adjustments.

AEM 30-0300 X-Series Wideband Gauge

AEM are a market leading brand that produce numerous gauges. The 30-0300 X-Series model is the brands most highly rated wideband gauge available. Compared to cheaper alternatives, it has a faster response time for improved feedback control.

The brand state that it is the fastest responding controller compared to 17 other UEGO controller in an independent study.

Other features of the AEM 30-0300 X-Series include:

  • Uses a Bosch LSU 4.9 sensor
  • 8-20 AFR range
  • Black face with green LEDs
  • Includes all hardware in the box
  • Requires no calibration
  • 52 mm housing
  • 0-5V and RS232 output for data logging

Overall, it is one of the best options for those requiring a high performance wideband gauge with fast responses. The modern design makes it ideal for an OEM style install but one drawback is that it comes with an expensive price tag.

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AEM 30-4110 UEGO Wideband AFR Gauge

The more affordable and popular wideband gauge by the AEM brand is the 30-4110 UEGO model. It uses the same Bosch 4.9 LSU sensor as the X-Series above but has a smaller AFR range of 10-20.

A desirable design feature of this gauge is the LED display with a sweeping LED needle, which changes colors from rich to lean.

Other features of the AEM 30-4110 UEGO include:

  • Interchangeable face plates (black or white)
  • Can be mounted in any position
  • No air sensor calibration required
  • Standard 52 mm housing
  • 0-5V analog output
  • Includes all hardware

The 30-4110 UEGO mode by AEM is by far the most popular wideband gauge available and for good reason. It has an intuitive display for instant feedback and the choice of a black or white face plate to suit your preferences.

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Innovate Motorsports 3918 MTX-L Plus Wideband Gauge

Innovate Motorsports are another brand that produce a wide range of wideband gauges. The 3918 MTX-L Plus is a premium option that uses a Bosch LSU 4.9 O2 sensor and enhanced heater control for a faster response.

The 52 mm gauge body will fit easily into most pods and it includes interchangeable face plates and bezels to suit your requirements.

Other features of the Innovate Motorsports 3918 MTX-L Plus include:

  • Large LED display
  • Programmable needle gauge
  • 7.35-22.39 AFR range
  • Improved sensor control
  • Patented direct digital technology
  • Enhanced heater control
  • Simple installation

The 3918 MTX-L Plus by Innovate Motorsports is a great alternative to the AEM models and is compatible with all fuel types. The sleek and modern design also make it suit most vehicles without being too obtrusive.

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Auto Meter 4379 Wideband Air Fuel Gauge

The Auto Meter 4379 wideband gauge uses an intuitive display with a digital segment and LED radial bar graph. The brand claim that this model provides rugged and reliable performance with precision movement and extreme accuracy.

It comes as a complete kit that includes a Bosch LSU 4.2 oxygen sensor, 8 foot wiring harness, weld-in stainless-steel bung and instructions.

Other features of the Auto Meter 4379 include:

  • 10-17 AFR range
  • 52 mm housing
  • Bosch LSU 4.9 O2 sensor
  • 0-4V data output
  • Includes all hardware
  • 1 year warranty

Overall, the Auto Meter 4379 is an excellent all-round wideband gauge that looks great and is easy to install. One drawback of this model is that it does take a brief moment (15 to 45 seconds) to re-calibrate each time you start the car.

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GlowShift Elite Wideband Gauge

For those that want more customization, the GlowShift Elite provides 10 different LED colors, which can be dimmed by 30%. The colors can be changed by a small dial, which allows you to switch easily to match your interior or night driving.

Although this wideband gauge is one of the cheapest, it still has great performance, data logging output and much more.

Other features of the GlowShift Elite Wideband Gauge include:

  • 10-20 AFR range
  • Peak recall ability
  • Audible and visual programmable warnings
  • 52 mm gauge housing
  • Includes all mounting hardware
  • 1 year warranty

For those that want to be able to program custom features such as warnings or change colors with ease, the Glowshift is the best option. This wideband gauge also offers great value for the money with similar performance to the premium alternatives.

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Wideband Gauge Buying Guide

An air fuel ratio gauge (also known as an AFR gauge) is a great bit of kit for those serious about the performance of the engine.

Once installed, it will allow you to closely monitor the mixture of air and fuel. They are available as a narrowband or the more desirable wideband, which is more precise.

To help you make an informed buying decision, we have produced the below guide regarding wideband gauges.

best wideband afr gauge

What are the Benefits?

Installing a wideband gauge to monitor the air to fuel ratio provides a range of benefits that include:

  • Easier to check the condition of the mixture
  • Provides instant feedback for diagnostic data logging
  • Allows you to tweak the mixture for maximum performance
  • Ideal for engine calibration
  • Makes the interior more interesting

Without installing a wideband gauge, you will need to read the spark plugs, use CO meters and other methods. The gauge eliminates the time and effort, which allows you to continue tweaking the mixture until it is reach optimum performance.

Narrowband vs Wideband

Air fuel gauges are available as a narrowband or the more desirable wideband gauge. The narrowband alternative uses the stock O2 sensor to retrieve the data and will have a smaller voltage range to read. The results of this is a less precise reading, which is not ideal for enthusiasts that want the best readings.

Compared to a wideband air fuel gauge, the wideband uses a larger voltage range for improved precision. They are often more expensive but the extra voltage provides more precise data and additional numbers, lights and colors on the display.

Compatibility and Installation

Prior to purchasing a wideband gauge, you will want to make sure that it is compatible with your vehicle. The first factor to consider is that some models are designed to only work with gasoline whereas others can work with all types of fuel types.

The installation of the gauge is fairly straightforward and most connect to ECUs and data loggers via the output port. Manufacturers usually include a complete wiring and mounting hardware to help with the installation.


Every car interior is different in terms of the colors and components. The ability to customize the face plates, LED display colors and needles is very desirable and can transform the interior. Other forms of customization include programmable alerts that are not just visual but also audible.


The recommendations within this article are all premium options because they provide superior accuracy. They all use the same Bosch LSU 4.9 O2 sensor, which are known for their performance and reliability. Differences between the accuracy vary by the AFR range that each gauge provides.

In order to ensure that you get the most from the sensor, you can re-calibrate the sensor on a regular basis if required. Some people may even place the sensor further into the exhaust ports to retrieve even more accuracy.

best wideband air fuel gauge

Calibration of the Gauge

Certain wideband gauges will require calibration upon every engine start. The calibration can take anywhere from a few seconds to a minute.

Some brands such as AEM claim that their gauges do not need calibration at all, which can be very beneficial.


If you are serious about your cars performance, the best wideband gauge is an essential modification. They are available in range of different styles but we highly recommend the AEM or Innovative Motorsports models for superior quality.

We have recommended a range of wideband gauges that are suitable for a range of budgets. There are many cheaper alternatives available but if you are going to the effort to install one, it is worth purchasing the best available.

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