---
product_id: 50068512
title: "AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge"
brand: "aem"
price: "₨8684"
currency: SCR
in_stock: true
reviews_count: 7
category: "Aem"
url: https://www.desertcart.sc/products/50068512-aem-30-0300-x-series-wideband-uego-afr-sensor-controller
store_origin: SC
region: Seychelles
---

# fastest wideband response 87% larger display multi-output data logging AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge

**Brand:** aem
**Price:** ₨8684
**Availability:** ✅ In Stock

## Summary

> 🏁 Tune like a pro, see like a boss.

## Quick Answers

- **What is this?** AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge by aem
- **How much does it cost?** ₨8684 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/50068512-aem-30-0300-x-series-wideband-uego-afr-sensor-controller)

## Best For

- aem enthusiasts

## Why This Product

- Trusted aem brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Slim & Sleek 52mm Design:** Fits effortlessly in tight spaces with ultra-slim depth for flexible, professional-grade installation.
- • **Massive 87% Larger Display:** See your AFR data with crystal-clear precision on a visually striking, modern gauge face.
- • **Customizable User Interface:** Switch AFR scales, calibrate on the fly, and adjust CAN IDs for a tailored, race-ready setup.
- • **Lightning-Fast X-Digital Tech:** Experience the fastest wideband response time for safer, more powerful engine tuning.
- • **Versatile Multi-Output Connectivity:** 0-5V, RS232, and CANbus outputs enable seamless data logging and feedback control.

## Overview

The AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge is a race-only, cutting-edge air/fuel ratio monitor featuring an 87% larger seven-segment display, ultra-fast X-Digital sensor technology, and multiple output options (0-5V, RS232, CANbus) for advanced data logging and feedback control. Its compact 52mm size with ultra-slim depth ensures versatile mounting, while customizable settings and auto-dimming enhance usability for precision tuning.

## Description

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. 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 allow 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. Legal Disclaimer WARNING: Cancer and reproductive Harm www.P65Warnings.ca.gov

Review: Seller didn't advertise this item properly - Some of the digits were not working properly.
Review: Beware - Fake item - The gauge came in a rather scruffy but genuine looking AEM box. However the gauge and sensor included were not genuine - The gauge was not even marked as AEM, and the sensor was not a Bosch unit. Have requested refund.

## Features

- This is a "race use only" product. No warranty for the Lambda Sensor. Return of the sensor is not accepted
- 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. Display Gasoline values from 8.0:1 to 20.0:1 AFR
- Faster response time improves wideband feedback control, and can provide a safer, more powerful and accurate tune

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0184TSI84 |
| Best Sellers Rank | 164,422 in Automotive ( See Top 100 in Automotive ) 10 in Car Electrical Air & Fuel Ratio |
| Brand | AEM |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,037) |
| Date First Available | 4 Dec. 2015 |
| Exterior | Painted |
| Item Weight | 0.28 g |
| Item model number | 30-0300 |
| Manufacturer | Advanced Engine Management |
| Manufacturer part number | 30-0300 |
| Model | 30-0300 |
| OEM Part Number | 30-0300 |

## Product Details

- **Brand:** AEM
- **Global Trade Identification Number:** 00840879024437
- **Item weight:** 0.01 Ounces
- **Material:** Plastic
- **UPC:** 840879024437

## Images

![AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge - Image 1](https://m.media-amazon.com/images/I/612s0KKTP+L.jpg)
![AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge - Image 2](https://m.media-amazon.com/images/I/618kdL8lBHL.jpg)
![AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge - Image 3](https://m.media-amazon.com/images/I/61CPBw7zlgL.jpg)
![AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge - Image 4](https://m.media-amazon.com/images/I/61DQZ4aDwIL.jpg)
![AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge - Image 5](https://m.media-amazon.com/images/I/61NZ-5-mnOL.jpg)

## Questions & Answers

**Q: Dose this item come with the collar to weld to the exhaust?**
A: Yes, this comes with the weld on boss

**Q: Is the weld-on boss mild or stainless steel?**
A: It is mild steel. You can find stainless steel bung if you want on our store. It is sold separately.

**Q: I want this just to raad my a/f just when i am using nitrous. will this work for that so as i spray nitrous & fuel if to leen or rich on the hit i can**
A: Yes, it will do what you need.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Seller didn't advertise this item properly
*by R***U on 9 October 2025*

Some of the digits were not working properly.

### ⭐ Beware - Fake item
*by C***R on 29 April 2023*

The gauge came in a rather scruffy but genuine looking AEM box. However the gauge and sensor included were not genuine - The gauge was not even marked as AEM, and the sensor was not a Bosch unit. Have requested refund.

### ⭐⭐⭐⭐⭐ Review
*by S***A on 22 August 2024*

Tengo 2 meses de uso y está funcionando perfectamente

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-09*