---
product_id: 545054883
title: "30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge"
brand: "aem"
price: "$758.07"
currency: USD
in_stock: true
reviews_count: 5
category: "Aem"
url: https://www.desertcart.us/products/545054883-30-0300-x-series-wideband-uego-afr-sensor-controller-gauge
store_origin: US
region: United States of America
---

# ultra-fast response time 87% larger center display 52mm compact size 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge

**Brand:** aem
**Price:** $758.07
**Availability:** ✅ In Stock

## Summary

> 🏁 Race-Ready Precision in a Sleek, Space-Smart Package

## Quick Answers

- **What is this?** 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge by aem
- **How much does it cost?** $758.07 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/545054883-30-0300-x-series-wideband-uego-afr-sensor-controller-gauge)

## 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

- • **Instant Readiness:** Factory-calibrated for rapid startup—get race-ready in seconds
- • **Data-Driven Control:** 0-5V, RS232, and CANbus outputs enable seamless integration and real-time logging
- • **Sleek Visual Impact:** 87% larger seven-segment display ensures critical data is impossible to miss
- • **Compact Yet Commanding:** 52mm diameter with an ultra-slim profile fits tight spaces without compromise
- • **Precision Meets Performance:** X-Digital broadband tech delivers unmatched AFR accuracy from 8.0:1 to 20.0:1

## Overview

The AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge is a race-use-only, 52mm diameter gauge featuring an 87% larger seven-segment center display for enhanced readability. It utilizes advanced X-Digital broadband technology to accurately measure air-fuel ratios from 8.0:1 to 20.0:1 with ultra-fast response times. Designed for easy integration, it offers 0-5V, RS232, and CANbus outputs for data logging and feedback control. Its slim profile allows installation in tight spaces, making it a top choice for professional racers seeking precision and reliability.

## 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 30-4110AEM Wideband Gauge's center display. This creates the perception of a larger overall gauge, but in a common 52 mm 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. Note: No warranty for the Lambda Sensor

Review: Excelente - Tengo 2 meses de uso y está funcionando perfectamente
Review: Très bon produit : précis et simple d'installation - J'ai acheté cette sonde Lambda pour remplacer mon ancienne INNOVATE qui ne fonctionnait plus convenablement. Le fait que ce soit le manomètre qui centralise le faisceau d'alimentation et celui de la sonde lambda rend l'installation simple. L'appareil gère tout seul son rétroéclairage donc deux connexions en moins. Le manomètre étant peu profond il peut s'installer même là où il n'y a pas beaucoup d'espace. Mais surtout ce que j'ai apprécié c'est la rapidité de mise en service à démarrage, le calibrage déjà réalisé en usine, la précision de lecture et la fiabilité du produit.

## Features

- This is a "race use only" product. No warranty for Lambda sensor. Sensor return is not accepted
- The UEGO X-Series Broadband AFR Sensor Control Meter (PN 30-0300) features a modern, visually appealing viewer and a new seven-segment center display 87% larger than the 30-4110 AEM
- The indicator 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 broadband technology gives these controllers the ability to read and report values that other controllers do not have. Displays petrol values from 8.0: 1 to 20.0: 1 AFR
- Faster response times improve broadband feedback control and can provide a safer, more powerful and accurate melody

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0184TSI84 |
| Brand | AEM |
| Brand Name | AEM |
| Country of Origin | USA |
| Customer Reviews | 4.6 out of 5 stars 2,117 Reviews |
| Global Trade Identification Number | 00840879024437 |
| Included Components | Product |
| Item Type Name | Indicator |
| Item Weight | 0.01 Ounces |
| Manufacturer | AEM |
| Material | Plastic |
| Material Type | Plastic |
| Model Number | 30-0300 |
| Number of Items | 1 |
| Part Number | 30-0300 |
| UPC | 840879024437 |

## Product Details

- **Brand:** AEM
- **Material:** Plastic
- **Item Weight:** 0.01 Ounces
- **Style:** Modern
- **Measuring Range:** 8.0:1 bis 20.0:1 AFR

## Images

![30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge - Image 1](https://m.media-amazon.com/images/I/61NZ-5-mnOL.jpg)

## Questions & Answers

**Q: Is it compatible with standard hp tuners vcm scanner for data logging?**
A: Yes

**Q: do I need 30-0310 also or is this complete?**
A: No need, the aem 30-0300 is a complete kit. The controller is in the gauge itself.

**Q: Does this come with a bosch 4.9 lsu?**
A: yes

**Q: How do you mount this? Do i have to buy a seperate mounting device?**
A: HelloWe usually mount it with this gauge pod Autometer 2204 or same oneIt sells separate https://www.amazon.com/Auto-Meter-2204-Mounting-Cup/dp/B0009RUXPG/ref=sr_1_2?ie=UTF8&qid=1491381219&sr=8-2&keywords=2204

## Customer Reviews

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

Tengo 2 meses de uso y está funcionando perfectamente

### ⭐⭐⭐⭐⭐ Très bon produit : précis et simple d'installation
*by F***C on 29 June 2021*

J'ai acheté cette sonde Lambda pour remplacer mon ancienne INNOVATE qui ne fonctionnait plus convenablement. Le fait que ce soit le manomètre qui centralise le faisceau d'alimentation et celui de la sonde lambda rend l'installation simple. L'appareil gère tout seul son rétroéclairage donc deux connexions en moins. Le manomètre étant peu profond il peut s'installer même là où il n'y a pas beaucoup d'espace. Mais surtout ce que j'ai apprécié c'est la rapidité de mise en service à démarrage, le calibrage déjà réalisé en usine, la précision de lecture et la fiabilité du produit.

### ⭐⭐⭐⭐⭐ Aem for the win
*by K***Y on 20 May 2026*

No issues, straight forward install. 17 sierra

## Frequently Bought Together

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-05*