AEM (30-0300-ACC) X-Series Wideband UEGO AFR Sensor Controller Gauge Accessory Kit — Overview

The AEM 30-0300-ACC is the official accessory and sensor kit designed for the AEM X-Series Wideband 30-0300 UEGO AFR Gauge.
This package provides the Bosch LSU 4.9 O2 sensor, wiring harnesses, CAN/analog cables, and installation hardware required to complete or service your wideband setup.

Ideal for replacing worn components, upgrading from older sensors, or finishing an incomplete X-Series wideband install.

Includes Silver Bezel & White AFR/Lambda Faceplate

AEM30-0300-ACC

X-series

0.352 ounces

What’s Included in the 30-0300-ACC Kit

Bosch LSU 4.9 UEGO Wideband O2 Sensor

Industry-standard accuracy
Fast response for safe tuning
Compatible with gasoline, E85, methanol, and race fuels

AEM 30-0300-ACC X-Series Wideband UEGO AFR Gauge

What’s in the box

AEM (30-0300-ACC) X-Series Wideband UEGO AFR Sensor Controller Gauge Accessory Kit

Plug-and-Play Wiring Harness

Correct connectors for the X-Series 30-0300 gauge
Heat-resistant sheathing for engine bay reliability
No cutting or splicing required

From the manufacturer

CANbus & Analog Output Cables

Allows direct connection to:

Standalone ECUs
Data loggers
AEM CD-Series digital dashes
Dyno systems

Mounting & Install Hardware

Everything needed for a clean, professional wiring installation.

WHO WE ARE AND WHAT WE BELIEVE

We create innovative new products that set the standard in the performance aftermarket, delivering the highest level of product integrity and making advanced technologies accessible to the racing masses. We believe that a positive customer experience is the key to our success. We achieve this success by delivering products that produce an exceedingly high level of gratification. We have a deep appreciation for every racer, enthusiast, and distribution partner who chooses to trust our products .

Key Benefits

Restores accurate AFR readings on aging or damaged setups
Ensures proper communication between sensor and X-Series gauge
Enables safe high-boost tuning with rapid sensor response
Replaces low-quality aftermarket wiring with OEM-grade components
Completes wideband installs missing original accessories

This kit provides the official AEM components needed to maintain or complete the X-Series 30-0300 wideband system.

OUR VALUES

Practicing honesty, integrity, and respect for our customers, vendors and each other
Maintaining an apolitical attitude, focusing on teamwork and common goals
Having a strong work ethic and taking a professional, resilient approach to all endeavors
Providing clear, concise communication

Installation Notes

Sensor requires a correctly positioned welded O2 bung
Avoid low-point placement to prevent moisture damage
Route wiring away from heat sources and sharp edges
CAN and analog outputs should be connected based on ECU/datalogger requirements

Typical install time: 30–60 minutes.

Final Verdict

The AEM (30-0300-ACC) X-Series Wideband UEGO AFR Sensor Controller Gauge Accessory Kit is the ideal solution for refreshing, repairing, or completing any 30-0300 wideband setup.
With OEM-grade wiring, a Bosch LSU 4.9 sensor, and full CAN/analog outputs, this kit delivers the accuracy and reliability needed for serious tuning and performance builds.

Specification: AEM 30-0300-ACC X-Series Wideband UEGO AFR Gauge

Brand	‎AEM
UPC	‎840879024604
Global Trade Identification Number	‎00840879024604
Model	‎30-0300-ACC
Item Weight	‎0.01 Kilograms, ‎0.352 ounces
Item model number	‎30-0300-ACC
Is Discontinued By Manufacturer	‎No
Manufacturer Part Number	‎30-0300-ACC
OEM Part Number	‎30-0300-ACC
ASIN ‏	B0184TLULQ
Date First Available	November 18, 2015
Manufacturer	‎AEM

Dimensions

Weight	0.01 kg

3 reviews for AEM 30-0300-ACC X-Series Wideband UEGO AFR Gauge

5.0 out of 5

★★★★★

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★★★★★

MacBook – January 15, 2023

Looks good and matches my other white gauges much better than the black finish. I’m glad AEM makes this as an option and doesn’t charge an exorbitant amount for it. More companies should follow this practice.

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★★★★★

Pete – August 28, 2018

My OEM cover X series gauge melted so needed a face plate replacement. Fitment was perfect!

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★★★★★

MICHAEL T. – February 2, 2018

As expected and arrived in good time

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AEM 30-0300-ACC X-Series Wideband UEGO AFR Gauge

AEM (30-0300-ACC) X-Series Wideband UEGO AFR Sensor Controller Gauge Accessory Kit — Overview