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AEM

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

  • Based on 1,964 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, Jul 18
Order within 10 hours and 30 minutes
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Features

  • 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

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.

Specs & Other Info

SpecificationDetails
BrandAEM
Construction MaterialDurable Plastic
Weight of Item1.43 pounds (0.65 Kilograms)
DesignContemporary
Accuracy of MeasurementSuperior
Installation MethodFlange Mount
Primary UseTimekeeping
ManufacturerAEM
Product Model30-0300
Origin of ManufactureChina
Product ExteriorFinely Machined
Manufacturer & OEM Part Number30-0300
Release DateNovember 18, 2015
Current StatusNot Discontinued

Frequently asked questions

The AEM X-Series UEGO Gauge is a tool used to monitor and display the air/fuel ratio (AFR) of your vehicle. This is essential for tuning and optimizing your engine performance. It ensures that your engine runs at the best efficiency, resulting in better fuel consumption, more power, and less potential for damage.

The AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge is versatile and can be used with most vehicles that have an On-board Diagnostics (OBDII) port. However, before purchasing, it's always recommended to check if your specific vehicle model is compatible with this device.

The AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge is known for its excellent accuracy. It uses Bosch 4.9 LSU wideband UEGO sensor and the fastest controller technology in a 52mm gauge providing real-time AFR values with less than 100 millisecond response time.

The AEM X-Series UEGO Controller Gauge is generally easy to install with appropriate mechanical experience. The package includes a complete installation manual with step-by-step instructions. However, if unsure, it's recommended to have it installed by a professional to avoid any potential damage.

Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.


These reviews suggest that the product is exceptional for fine tuning engines, enhancing power, and improving overall vehicular performance. It seems convenient to install, works great after initial adjustments and provides good value for the price. Note that some users have reported issues with the bezel and recommend testing the product immediately following purchase.

Pros

  • 🔥 Considerably enhances engine performance.
  • 🔧 User-friendly installation process.
  • 💰 Provides good value for money.
  • 💡 Allows for precise tuning.

Cons

  • 😕 Some users found the bezel thick, causing aesthetic concerns.
  • ☝️ Needs immediate testing after purchase to ensure perfect functionality.
  • 🎨 Matte finish of the bezel didn't match with most interiors which may require additional modification (like painting).

Should I Buy It?

Based on the high ratings, user satisfaction, and multi-functional use, it is recommendable to purchase the product assuming the minor concerns raised aren't significant hindrances. It appears to deliver excellent results in terms of tuning and boosting performance, thereby making it a valuable addition to your automotive toolbox.


  • Good sensor
Love it since I've had it no issues at all. If you got this and are trying to figure out the wiring for a 07-14 chevy and a Pro-Link just add me on FB and message me and I'll shoot a pic of the wiring. Brian Harvill (verified)
Reviewed in the United States on June 8, 2025 by Brian H.

  • Accurate
Very accurate, and is the best thing I have bought for a carbureted engine. Very easy to read, and has been going strong for over a year now. No complaints.
Reviewed in the United States on October 4, 2024 by Kevin

  • Easy to install, very accurate
Reads the same as the accessport in my sti. Replaced my innovate lc2 with this. Far more accurate, way simpler, way easier to install. Looks great, an essential for boosted cars.
Reviewed in the United States on December 31, 2024 by Thomas

  • Works amazingly well
Excellent AF meter - works really well
Reviewed in the United States on June 10, 2025 by john kolkka

  • Excellent wideband
This is the best product on the market bang for buck. This sensor provides a wide range of measurements of rich and lean and provides provisions for a data logger to utilize the information off the sensor. Every component is of quality and is sure to last given proper installation and setup.
Reviewed in the United States on February 9, 2025 by Vladimir

  • Buy from a know supplier.
Amazon is a well known distributor so definitely a good company to buy this from since also now aem is having problems with China making knock off their products. Definitely looks simple to install.
Reviewed in the United States on January 12, 2025 by David R

  • accurate
good product has held up pretty good and pretty accurate
Reviewed in the United States on May 21, 2025 by Reinaldo hernandez

  • Do not buy. Every piece that was supposed to make this wideband good makes it trash.
Absolute trash for anything except looking pretty. Occasionally throws itself into heating mode for 10+ minutes of driving? Check. Won't output anything except .6-1.2v on the analog (0-5v) output? Check. Serial output is buggy and takes so many extra samples that you end up with a 2gb file from a 30min drive? Check. Included Sensor (FAE) is terrible and will break on you within a month. ... show more
Reviewed in the United States on June 29, 2025 by Dawson

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