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AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge

4.7 4.7 out of 5 stars 1,713 ratings

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Brand AEM
Material Plastic
Item Weight 1.33 Pounds
Style Modern
Measurement Accuracy great

About this item

  • The X-Series wideband UEGO AFR sensor controller gauge (PN 30-0300) features a modern, visually striking faceplate and new seven-segment, center display that is 87% larger than the 30-4110 AEM
  • The gauge includes a 0-5v and RS232 Serial Port output for feedback control and data logging, and an AEMnet (CANbus) output for data logging
  • X-Digital wideband technology gives these controllers the ability to read and report values that other controllers do not, which can deliver more optimized engine tuning and a safer overall operating condition
  • Faster response time improves wideband feedback control, and can provide a safer, more powerful and accurate tune
  • When tuning an engine using wideband AFR feedback control on an inertia dyno, dead time affects the data you are looking at because it is reported in a different operating location than when it actually occurred
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From the manufacturer

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AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge

Description:

The X-Series Wideband UEGO AFR Sensor Controller Gauge (PN 30-0300) measures 2 1/16th-inch (52mm) in diameter and features a modern, visually striking faceplate and new seven-segment center display that is 87% larger than the 30-4110 AEM Wideband Gauge’s center display. This creates the perception of a larger overall gauge, but in a common 52mm size for easy mounting. Its slim depth (less than one inch overall) and ultra-slim cup depth of .200-inches dramatically increases its application base and potential mounting locations.

The X-Series Wideband 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 new gauge’s durability.

The gauge includes a 0-5v and RS232 Serial Port output for feedback control and data logging, and an AEMnet (CANbus) output for data logging. AEMnet allows additional X-Series Wideband Controllers to be daisy chained together (up to 16 cylinders) for recording AFR in multiple cylinders. It supports vehicle/system voltages up to 16V, and can be used on EFI or carbureted applications, and dynamometers in applications using gasoline, methanol, ethanol, Diesel, propane, and CNG.

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X-digital technology:

X-Digital wideband technology gives these controllers the ability to read and report values that other controllers do not, which can deliver more optimized engine tuning and a safer overall operating condition. The controller’s high-speed digital implementation ensures no loss of signal fidelity and full transient response, making it able to identify the slightest fluctuations in AFR and output them in full value.

Factory calibration resistor or free-air cal, it’s your choice!: The X-Series Wideband Gauge and X-Series Inline Controller support the popular Bosch 4.9LSU sensor and can utilize both the factory calibration resistor and free-air calibration methods**. This allows users to take advantage of the precise factory resistor calibration when a sensor is new but then allows for free-air calibrations if the user desires when the sensor ages. It’s the perfect marriage of simplicity and accuracy!

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Features:

  • X-Series Wideband UEGO AFR Controller Gauge were fastest responding wideband air/fuel ratio controllers in an independent test vs. 17 competitors wideband AFR controllers
  • Includes Bosch 4.9LSU wideband UEGO sensor
  • Factory calibrated resistor does not require free-air calibration, but technology allows for free-air calibration as sensor ages if user desires
  • Compatible with vehicle/system voltages up to 16V
  • 0-5V & RS232 output for data logging and feedback control, AEMnet (CANbus) for data logging and daisy-chaining multiple controllers up to 16 cylinders
  • Can display AFR values in hundredths of %
  • 52mm gauge diameter and slim 0.825” gauge depth
  • Gauge cup depth only .200” deep!
  • Auto dimming feature
  • User configurable display via buttons on the gauge face for changing AFR values, Lambda and O2%, and 3- or 4-digit display

Product Description

AEM's X-Series wideband UEGO Air/Fuel ratio sensor controller gauges are built upon unique, patent-pending X-Digital technology that makes them the fastest responding wideband air/fuel ratio controllers in independent testing against 17 other wideband UEGO air/fuel controllers.

Product information

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Warranty & Support

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AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge


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What's in the box

  • X-Series Wideband UEGO AFR Sensor Controller Gauge
  • Product guides and documents

    Looking for specific info?

    Customer reviews

    4.7 out of 5 stars
    4.7 out of 5
    1,713 global ratings

    Customers say

    Customers like the ease of use, quality, accuracy, and value of the electronic sensor. For example, they mention it's straightforward to install, has a nice long wiring harness, and is easy to read. That said, they're happy with appearance, responsiveness, and ease of tuning. That being said, opinions are mixed on performance.

    AI-generated from the text of customer reviews

    59 customers mention56 positive3 negative

    Customers find the electronic sensor very straightforward to install and wire. They say it's simple and easy to read directions. Customers also mention that the sensor comes with everything needed to install, making the wiring cleaner and easier. Overall, customers find the sensor to be a great product and helpful when setting up a new engine.

    "...Easy to install everything works great just not a fan of how it sits in the pod. Otherwise great wideband" Read more

    "...Surprisingly easy to install and calibrate! Will update after a few months" Read more

    "...its easy to read and it seems more acurate." Read more

    "...Its simple, reads fast, and with the sweeping led, is easy to see whats going on without looking directly at it...." Read more

    57 customers mention46 positive11 negative

    Customers like the quality of the electronic sensor. They mention that it works well, has a state-of-the-art design, and is well-built. Customers also appreciate the wiring harness, saying it's well-thought out and easy to install.

    "It works very well, very nice, thank you, I recommend it.100%" Read more

    "...The wiring/cables are of excellent quality and long enough for a rear engine vehicle...." Read more

    "Good product ..works Well and fits just right" Read more

    "Packaging is nice, product is nice, extremely fast response time which is good for data logging. I have 0 complaints." Read more

    51 customers mention45 positive6 negative

    Customers like the accuracy of the electronic sensor. They mention that it's the best wideband gauge out there, it gives instant feedback, and it'll match the readings perfectly. Some say that the logging accuracy is great and that it gives them instant feedback versus having to look at a data log after the fact.

    "...Otherwise great wideband" Read more

    "...its easy to read and it seems more acurate." Read more

    "-Very nice wideband gauge/controller!-Everything you need is in the kit...." Read more

    "...It's easy to read, day or night, and the large digital readout is a plus...." Read more

    25 customers mention25 positive0 negative

    Customers are satisfied with the value of the electronic sensor. They mention it's a great product for the price, it saves them dyno costs, and it'll be a good purchase. Some say that it'd be the best on the market for tuning.

    "...Overall, worth the investment in my opinion." Read more

    "Great product for the price" Read more

    "...Awesome unit at a very good price." Read more

    "...It reads 12.5 at idle and 11 at wide open.Worth the money! Saves me dyno costs and I can drive with Pease of mind." Read more

    20 customers mention20 positive0 negative

    Customers are satisfied with the appearance of the electronic sensor. They mention that it has a clean OEM-like appearance, and a much improved design. Some appreciate the nicer display and the fact that it's 100% accurate.

    "...The package looks great and the Guage looks nice. Sensor is heavy duty with some nice grease on it already. Hopefully I can get the instructions soon." Read more

    "...This is the updated version of what I've used before but it looks even better...." Read more

    "...The kit is very nice and they give a generous amount of length of both wiring harnesses. I used a clamp on O2 sensor bung. Happy with the purchase!" Read more

    "...SMY also makes a vent gauge pod which has a clean OEM-like appearance. I highly recommend getting this gauge." Read more

    19 customers mention15 positive4 negative

    Customers like the responsiveness of the electronic sensor. They say it has a fast response, is accurate, and warns up quickly. They also appreciate the fast updates and the fact that it reads within seconds.

    "...-Everything you need is in the kit.-Fast updates, no “freezing” requiring a reboot like some competitors.Key features:..." Read more

    "Packaging is nice, product is nice, extremely fast response time which is good for data logging. I have 0 complaints." Read more

    "...Fast response, 4.9 Bosch sensor and I like the thinner gauge since I normally temporarily install these to tune a carburetor and then remove them...." Read more

    "...back to life then started showing glitching lights, and got stuck in an endless heat cycle...." Read more

    11 customers mention11 positive0 negative

    Customers find the electronic sensor easy to use. They mention it's a perfect solution for tuning, and appreciate the responsiveness of its output. Some say that it works great for carb tuning.

    "...I like the responsiveness of its output for tuning and the sweeping LED part of the display is useful for visualizing transients like acceleration..." Read more

    "...But, these are the best for tuning carburetors. The response is fast enough to see the pump shot effects...." Read more

    "This is a must for any carb’d engine! Easy tuning" Read more

    "...Nice to have that feedback in realtime. Makes tuning a bit easier for sure." Read more

    112 customers mention76 positive36 negative

    Customers are mixed about the performance of the electronic sensor. Some mention that it works very well, is easy to use, adjust, and works well with the included Bosch sensor. However, others say that the sensor was maybe a dud, the ECU reads without the gauge, and the car won't run.

    "It's very good performance" Read more

    "It works very well, very nice, thank you, I recommend it.100%" Read more

    "...Will do this in the future, but for now its great as is. Gauge pod not included(Bully Dog for 4th Gen Ram 1500,2500,3500)." Read more

    "...For mounting, I used the AUTO METER 2204 Mounting Cup and it worked perfectly. I used a hose clamp and then covered it with black heat shrink tubing." Read more

    Solid
    5 Stars
    Solid
    Bought this to replace my innovate. Using it for about a week and pretty happy how accurate it runs so far. Surprisingly easy to install and calibrate! Will update after a few months
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    5.0 out of 5 stars Thanks!!
    Reviewed in the United States on February 1, 2024
    It works very well, very nice, thank you, I recommend it.100%
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    Reviewed in the United States on February 2, 2024
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    5.0 out of 5 stars Solid
    Reviewed in the United States on February 2, 2024
    Bought this to replace my innovate. Using it for about a week and pretty happy how accurate it runs so far. Surprisingly easy to install and calibrate! Will update after a few months
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    Reviewed in the United States on October 22, 2023
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    Top reviews from other countries

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    Austin
    5.0 out of 5 stars Works great 👍
    Reviewed in Canada on August 7, 2023
    Luis Alvarez
    5.0 out of 5 stars Excelente... espero que dure más que la anterior.
    Reviewed in Spain on August 31, 2023
    Amazon Kunde
    5.0 out of 5 stars Sehr hilfreich.
    Reviewed in Germany on March 31, 2023
    Riccardo
    5.0 out of 5 stars Ottimo
    Reviewed in Italy on March 9, 2022
    Frederic
    5.0 out of 5 stars Très bon produit : précis et simple d'installation
    Reviewed in France on June 29, 2021
    2 people found this helpful
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