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Description, Reviews, Q&A
The AEM Wideband X-Series UEGO AFR Gauge has a user configurable display via buttons on the gauge face that allows you to change AFR values for different fuels, Lambda or O2%, change the center display to three or four digits, perform a free-air calibration if desired as the sensor ages, and change the CAN message ID when linking multiple X-Series Inline Controllers or X-Series Controller Gauges. A black bezel and black dual-faced faceplate for air/fuel and Lambda are included, and an optional silver bezel with white dual-faced air/fuel and Lambda faceplate is available (PN 30-0300-ACC, sold separately). An Auto Dimming feature is included. Locking connectors ensure a positive connection between the harnesses and gauge and a new single board design adds to the gauge's durability.
Category Description: The Company's induction systems number in the hundreds. AEM is still the one to beat.
Subcategory Description: Having a set of gauges in your car can be very critical, especially if you're one who likes to drive aggressively at the track. Keep an eye on the health of your vehicle with Air fuel ratio (afr), oil pressure, oil temperature, water temperature, and many more gauges. Select from our list of brands like AEM, Turbosmart, Innovate, Autometer, and more!
Brand Description: AEM was founded in 1987 by John Concialdi (J.C.) and Bob Sullivan as a tuning performance shop. The shop focused on vintage automobiles and the latest trends in street racing modified imports. With its location in Compton California, AEM was embedded in the tuner market from the very beginning. It was a matter of being in the right place, at the right time, with the right technical knowhow. Between J.C. and Sullivan, AEM had two important advantages. Technical engine knowledge and massive creativity fueled by an unbridled passion to make things go faster. When it came to understanding air flow through an engine, few had more experience than Concialdi. He managed the R&D department for Weber Carburetors for North American aftermarket applications the previous 10 years. By 1993 when the shop relocated to Gardena California, AEM had the reputation as a modifier of choice. The business had grown so much that at times it ran 24 hours a day. Racers depended on AEM to have cars ready for the next street race or sanctioned event. Cars and drivers sporting AEM's bright yellow logo became famous in the street racing scene for one consistent reason, they won races. AEM's first glimpse of mainstream notoriety came when cars tuned by their shop won at the Battle of the Imports. This highly contested shoot-out landed AEM on the cover of Turbo Magazine and Sport Compact Magazine. Many of the most visible drivers in import street racing ran cars modified by AEM. This included names like Adam Saruwatari, Tony Fuchs, Brian Kim and Darin Ishitani, Archie Medrano, Russ Matuseavich, Abel Iberra, Miles Bautista, E.T. Saffon.
AEM developed one of the first Packaged Air Induction Systems. Its design came from their experience in dyno testing, understanding intake energy dynamics and racing at the Battle of the Imports. AEM's presence in the tuner movement and its proximity to Nissan, TRD and Honda allowed them a unique opportunity. There was an advantage to living side by side with racers and working with OES engineers. AEM was able to understand both the practical and theoretical side of engine performance. AEM's first air intake kit was offered for sale in 1994 as a 'Do-It-Yourself' upgrade for the Honda CRX. This intake proved to be the beginning of a whole new tradition. People could suddenly purchase affordable cars and modify them for increased torque and horsepower. AEM has been a leader in the development of precision tuned induction systems since the Battle of the Imports. Today
AEM Electronics 30-0300
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Jun 17, 2025
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
Excellent
Great product, works great with my HP tuner. Easy install but I do have a lift. Took me about an hour because I ran the wiring the right way for a permanent install.
May 3, 2025
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
Wideband UEGO AFR
Reads the AFR pretty well and accurate. It is truth worthy and will have your tune on point. Also, gives the interior a more aggressive feel.
Feb 20, 2025
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
AEM wideband
Works as it should, no issues. Simple install, either weld in your own bung or have a shop install pending skill set. Accurate reading for tuning and engine monitoring.
Jan 4, 2025
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
X-Series Wideband
The AEM X-Series Wideband UEGO AFR Gauge is a reliable and accurate tool for monitoring your air-fuel ratio (AFR). It uses the Bosch LSU 4.9 sensor, which is known for its accuracy and fast response. This is especially helpful when tuning your engine or keeping an eye on your AFR for performance and safety.
Aug 17, 2024
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
Perfect choice
This unit comes ready to install and everything is easy and useful instructions
Jul 30, 2024
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
Easy
It was my first time and I had no issues. YouTube was helpful. Not all wires were used.
Jul 29, 2024
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
AEM GAUGE
AMAZING, was simple to install, last piece that I needed to get a remote tune, very accurate, love it
Jun 3, 2024
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
Excellent wideband, and integrates well with most tuners
This is not the only wideband sensor I have or have used, but it's probably my current favorite for everyday tuning and monitoring of A/F ratio. The 30-0334 is another $50, but can be wired to your car's electronics simply by plugging it's jumper OBD2 connector onto your vehicle's and can directly broadcast your data over the car's CAN Bus. The 30-0300 is the identical sensor and gauge, save for the OBD2 connector part. All wires on that version need to be manually connected to your vehicle, but it also has the capability of being used over CAN or providing an output for data logging, tuning etc.. If you have an older carbureted and/or non OBD2 vehicle, don't spend the extra $50 on the 0334. Mine is being used on a 2017 C7 Corvette, and has been an indispensable tool in conjunction with my HP Tuners to get my combination dialed in. My installation took longer than most, as I pulled my radio out to incorporate it in the storage area behind the display screen. Most standard installs probably take about an hour. The response time and resolution are great on this sensor, and unlike a competitor's gauge/sensor that I have on a Mustang, this one consistently fires up every time and reads without having to reboot/key cycle occasionally like the other brand's does. It integrates well with HP Tuners. (There's a ton of info on the net on how to set it up with HP) I have absolutely nothing bad to say about this one. I realize they aren't cheap, but I can honestly say based on its performance and reliability combined with how well it provides a necessary function for tuning, it's worth every penny! Great tool.
Feb 1, 2024
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
AEM WIDEBAND!
AEM is one of the greatest product! this one gives u a better and more precise tuning
Oct 20, 2023
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
great gauge
it requires some wiring and drilling but the gauge make the interior look so siiiiiiiick
Jun 17, 2025
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
Excellent
Great product, works great with my HP tuner. Easy install but I do have a lift. Took me about an hour because I ran the wiring the right way for a permanent install.
May 3, 2025
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
Wideband UEGO AFR
Reads the AFR pretty well and accurate. It is truth worthy and will have your tune on point. Also, gives the interior a more aggressive feel.
Feb 20, 2025
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
AEM wideband
Works as it should, no issues. Simple install, either weld in your own bung or have a shop install pending skill set. Accurate reading for tuning and engine monitoring.
Jan 4, 2025
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
X-Series Wideband
The AEM X-Series Wideband UEGO AFR Gauge is a reliable and accurate tool for monitoring your air-fuel ratio (AFR). It uses the Bosch LSU 4.9 sensor, which is known for its accuracy and fast response. This is especially helpful when tuning your engine or keeping an eye on your AFR for performance and safety.
Aug 17, 2024
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
Perfect choice
This unit comes ready to install and everything is easy and useful instructions
Jul 30, 2024
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
Easy
It was my first time and I had no issues. YouTube was helpful. Not all wires were used.
Jul 29, 2024
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
AEM GAUGE
AMAZING, was simple to install, last piece that I needed to get a remote tune, very accurate, love it
Jun 3, 2024
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
Excellent wideband, and integrates well with most tuners
This is not the only wideband sensor I have or have used, but it's probably my current favorite for everyday tuning and monitoring of A/F ratio. The 30-0334 is another $50, but can be wired to your car's electronics simply by plugging it's jumper OBD2 connector onto your vehicle's and can directly broadcast your data over the car's CAN Bus. The 30-0300 is the identical sensor and gauge, save for the OBD2 connector part. All wires on that version need to be manually connected to your vehicle, but it also has the capability of being used over CAN or providing an output for data logging, tuning etc.. If you have an older carbureted and/or non OBD2 vehicle, don't spend the extra $50 on the 0334. Mine is being used on a 2017 C7 Corvette, and has been an indispensable tool in conjunction with my HP Tuners to get my combination dialed in. My installation took longer than most, as I pulled my radio out to incorporate it in the storage area behind the display screen. Most standard installs probably take about an hour. The response time and resolution are great on this sensor, and unlike a competitor's gauge/sensor that I have on a Mustang, this one consistently fires up every time and reads without having to reboot/key cycle occasionally like the other brand's does. It integrates well with HP Tuners. (There's a ton of info on the net on how to set it up with HP) I have absolutely nothing bad to say about this one. I realize they aren't cheap, but I can honestly say based on its performance and reliability combined with how well it provides a necessary function for tuning, it's worth every penny! Great tool.
May 17, 2024
Review shared from AEM Electronics Digital Wideband UEGO AFR Gauge (Universal; Some Adaptation May Be Required)
Aem afr gauge
This is as good as expected or better. Such a good fast accurate reading for tuning now with the Uego sensor kit. Very satisfied.
Feb 1, 2024
Review shared from AEM Electronics X-Series Wideband UEGO AFR Sensor Controller Gauge (Universal; Some Adaptation May Be Required)
AEM WIDEBAND!
AEM is one of the greatest product! this one gives u a better and more precise tuning