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Best Wideband Gauges: Top Options for High-Performance Engines

Get accurate readings of your vehicle’s air-to-fuel ratios with these wideband gauges

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BYNorah Tarichia/ LAST UPDATED ON May 17, 2021

A wideband gauge or a wideband O2 sensor is the next best upgrade from a narrowband gauge. It helps those with powerful engines to monitor the air-to-fuel ratios that can’t be recognized by a narrowband gauge. We take a look at some of the top wideband gauges for your vehicle in the guide below.

Best Overall

AEM UEGO Gauge Display Set  

Summary
A set of customizable gauges that can fit in almost all gauge pods
Pros
Fast, accurate, and highly responsive. Power-efficient. Easy-to-read LED display. Color changing indicator needle. It doesn’t need free air sensor calibration. Includes interchangeable faceplates and bezels. Includes a booster pressure gauge.
Cons
Non-interchangeable sensors. It doesn’t measure ratios lower than 10:1. Short bung.
Best Value

Innovative Motorsports MTX-L Plus 

Summary
An innovative wideband gauge with fast analog speeds and superior sensor control.
Pros
Affordable. Sleek design. Accurate and reliable. Easy to read. Features 100-percent digital wideband technology. It can calibrate the oxygen sensor for maximum accuracy. Durable. Easy to install and use. Offers fast O2 sensor feedback.
Cons
Hard-to-follow user instructions. It doesn’t come pre-calibrated. It has a delicate sensor that’s prone to failure.
Honorable Mention

GlowShift Elite AFR Gauge Kit

Summary
A colorful wideband gauge with an analog display that’s compatible with most modern data loggers.
Pros
Reads from 10.0 to 20.0 AFR. Vintage look. It can display 10 different LED colors. Adjustable brightness. Includes an audio-visual warning when limits are exceeded. It comes with mounting hardware. Backed with free lifetime technical support.
Cons
Some of the LED colors may stop working. May display inaccurate readings with time. Vague installation instructions.
Best Wideband Gauges: Top Options for High-Performance Engines

The AEM 2 Gauge Display Set comes with two wideband gauges for versatility and functionality. Each one is designed as both a dual analog and digital AFR gauge, increasing their usefulness by providing you with an easy-to-read screen.


The gauges are fast, accurate, and highly responsive when it comes to monitoring and recording the fuel to air ratio. They are also power efficient, and include easy-to-read LED displays with a color-changing indicator needle. They also come with interchangeable faceplates and bezels and a booster pressure gauge.


However, the sensors are non-interchangeable. The gauges are not rated to measure ratios lower than 10:1. They also have a rather short bung and they don't feature back lighting while driving at night.

Here is a high-tech modern wideband gauge built to record and capture sensory data quickly and efficiently. The gauge is built with a fast analog output speed and an enhanced heater control for more accurate readings. It’s also affixed with a Bosch LSU 4.9 wideband 02 sensor and a 52mm diameter screen. 


We like that the price is lower than some other name brand options on the market. It is sleekly designed, accurate, reliable, and easy to read. Plus, it features 100-percent digital wideband technology, it provides O2 feedback, and it has a universal fit.


However, you may not be able to understand the instructions. They are a bit difficult to follow. Also, it does not come pre-calibrated, and the gauge has a delicate sensor that’s prone to failure.

This wideband gauge from GlowShift features 10 color modes. This makes it one of the most versatile choices when it comes to displaying your personal style. It also includes an analog display with a brightly lit red needle for better visibility on its 52mm diameter screen. 


The gauge reads from 10.0 to 20.0 AFR, includes adjustable brightness levels, and has audible and visual warning alerts that let you know when limits are exceeded. It also includes all of the mounting hardware you need to install it. Plus it is backed with free lifetime technical support.


Unfortunately, you may find that over time a few of the LED colors may stop functioning. The device may also display inaccurate readings as well. Plus, the installation instructions can be vague.

This wideband gauge is elegantly designed and includes a large screen. It includes a 52mm faceplate with a seven-segment center display. It’s also designed with a slim depth so it can be easily mounted in more places around the car. It won’t take up a lot of space either.


The gauge includes configurable buttons that allow you to change AFR values for different types of fuel. It’s even compatible with voltages up to 16V, includes an auto-dimming feature for night driving, and functions quickly so you are kept up to date with recent readings. It’s also rather simple to install.


However, it comes with a lot of extra wiring. The wires can be difficult and annoying to manage. The kit is also expensive.

The Auto Meter Ultra-Lite Digital Wideband Air and Fuel Ratio Kit is a great option for your vehicle. It has one of the easiest to read screens around due to its fully digital faceplate. Plus its custom tuned .1 AFR Resolution Bosch LSU4.2 Sensor monitors air and fuel readings quickly. 


It’s a high-grade device that comes with everything you need to get it mounted quickly. One of its best features is its design. The screen is surrounded by a stainless steel housing, increasing its durability, toughness, and reliability. It is lightweight as well, and it looks great in your car. 


But one thing you will notice is the price of the kit. The AFR reader is pricey, but it doesn’t look very modern or fancy. Yes, it may look great once mounted, but some may find the device bland looking.

A futuristic-looking wideband gauge designed to read levels with improved accuracy. It is an all-digital gauge built with a large viewing screen with bright blue text that is easy to read. The device includes 32-channel data logging and can log hundreds of hours worth of information onto an SD card. 


The gauges are available in three different colors as well including red, green, and blue text. It’s a huge step above analog wideband gauges that may be more difficult to read and understand at a glance. It’s built to monitor superchargers, turbos, and standard engines too, making it versatile and highly functional.


However, it isn’t a device without faults. The one glaring negative about the Innovate Wideband Air/Fuel DB Gauge is its price point. While we understand they all will generally be expensive, this one is missing some great benefits such as a dimming feature. Reducing the light levels could really make a difference while driving at night.

While Auto Meter has been featured on our list already, this model stands out from its counterpart. The design is different and in a good way. While there is no means anything wrong with the previously mentioned ones look, this one feels and looks more modern and hi-tech. The housing is developed out of stainless steel increasing its durability. 


However, by far the most important thing about this wideband gauge when compared to the other is its price. It is by no means cheap but it is a less expensive choice. The device features a .1 resolution Bosch LSU4.2 sensor for fast upload speeds. It is also built to function with gasoline engines and has a LED radial bar graph display.


It does come with a lot of cables and wires that you may not necessarily need. This may make installation a bit more time-consuming. Installation may also be more difficult due to the fact the instructions are hard to follow.

A great tuner device for monitoring fuel and air ratios built for racers or commuters. If you’re focused on high-performance readings and levels, then this is a great wideband gauge to consider. The compact 52mm gauge is lightweight and sets snugly and firmly in your vehicle without taking up much space at all. 


The gauge is built with a black dial, a tinted lens, and an all-digital and large display. The screen is brightly lit and blends in with your speedometer, radio, or whatever other tech you may have upfront on the dash. It also comes with a nice dimming feature that automatically dims by 30 percent when night falls.


While not a major pain, you are stuck with the blue light, as it cannot be changed. Even though the box labels it the 7 Series, that does not mean it includes seven colors.

Tips

  • Calibrate your wideband oxygen sensor often to maintain accuracy. You should do this every three months. Also, recalibrate the sensor when you experience altitude changes of more than 5,000 feet. 
  • If you notice that the wideband gauge is displaying faulty readings, it could be due to a bad sensor. Your car may run less efficiently, and you may experience engine misfires or rough idle. Also, the check engine lights will constantly come on. Consider getting an aftermarket oxygen sensor replacement that can pair with the wideband gauge. 
  • You can loosen a rusted or stuck oxygen sensor with penetrating oil. Alternatively, if the sensor is in an open place where you can easily remove it, you could heat up the engine for about 30 minutes and allow the exhaust and catalytic converter to heat up. The metal will expand and release the sensor. Do not pour cold water on the sensor as it may crack. Use gloves to protect your hands from the heat. 

FAQs

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Our reviews are driven by a combination of hands-on testing, expert input, “wisdom of the crowd” assessments from actual buyers, and our own expertise. We always aim to offer genuine, accurate guides to help you find the best picks.

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Q: How does a wideband gauge work?

A: Wideband gauges use accurate oxygen sensors to measure the air-to-fuel mixture in your engine's exhaust. The sensor feeds the data to the vehicle's computer system, which is then translated into numerical figures that appear on the wideband display.

Q: What causes a wideband gauge failure?

A: The main cause of failure is poor positioning of the oxygen sensor. The oxygen sensor needs to be positioned 24 inches downstream from the exhaust ports to take accurate measurements. If it’s too close to the exhaust, the high gas temperatures and high overcooling velocity of the exhaust gas will lead to sudden overheating or freezing of the wideband, which can destroy the components. 

Q: What's the difference between a narrowband and wideband AFR gauge?

A: A narrowband Air Fuel Ratio (AFR) gauge uses your car's stock O2 sensor and will only read data at a range of zero (lean mix) to one volt (rich mix). A wideband gauge typically comes with its own oxygen sensor that reads data at about zero to five volts. It’s, therefore, more accurate than a narrowband gauge and typically features fancy LED-lit displays.

Final Thoughts

We chose the AEM UEGO Gauge Display Set as our top pick due to its reliable calibration and accurate data readings. It also sends back timely responses to even the slightest changes in ratios and draws minimal current from your vehicle’s electrical system. 

The Innovative Motorsports MTX-L Plus is our value pick. It’s one of the most affordable wideband gauges that provide accurate real-time data on how the engine is running.

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