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

The AEM Wideband X-Series 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. X-Series Wideband UEGO AFR Sensor Controller Gauge Accessory Kit, Includes Silver Bezel and White AFR-Lambda Faceplate

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

The AEM X-Series Wideband UEGO AFR Sensor Controller Gauge Accessory Kit adds a customizable display and advanced monitoring capability to compatible AEM X-Series wideband systems. Part number 30-0300-ACC includes a silver bezel and white dual-faced air/fuel ratio and Lambda faceplate, providing an alternate appearance for the X-Series controller gauge. A black bezel and black dual-faced faceplate are also included with the gauge system, while the optional silver bezel and white faceplate configuration is available as this accessory kit.

Designed for accurate, responsive engine monitoring, the X-Series gauge uses AEM’s patented X-Digital wideband technology and includes a Bosch 4.9 LSU wideband UEGO sensor. The factory-calibrated resistor eliminates the need for routine free-air calibration, while user-selectable calibration remains available as the sensor ages. Buttons on the gauge face allow adjustment of fuel-specific AFR values, Lambda, oxygen percentage, three- or four-digit center display modes, and CAN message ID settings when multiple X-Series Inline Controllers or Controller Gauges are linked.

The gauge supports 0–5V and RS232 outputs for data logging and feedback control, along with AEMnet CANbus connectivity for data logging and daisy-chaining multiple controllers across systems supporting up to 16 cylinders. Locking connectors help maintain secure harness connections, and the single-board design improves durability. Auto-dimming adjusts display brightness for changing ambient light conditions. The compact 52mm gauge format and shallow installation profile suit a wide range of custom vehicle interiors and motorsport applications. This product is not CARB approved; verify vehicle and system compatibility before installation.

What's Included

• AEM X-Series wideband UEGO AFR controller gauge accessory kit
• Silver bezel
• White dual-faced AFR and Lambda faceplate
• Compatible Bosch 4.9 LSU wideband UEGO sensor

Fitment

Universal automotive fitment for compatible AEM X-Series wideband UEGO controller gauge systems. Vehicle-specific fitment data was not provided; confirm space, wiring, voltage, and controller compatibility before installation.

Features:

• User-Configurable Display: Adjust fuel-specific AFR values, Lambda, O2 percentage, three- or four-digit display modes, and CAN message ID settings using the gauge-face buttons.
• Fast Wideband Monitoring: Patented X-Digital technology and an included Bosch 4.9 LSU sensor provide responsive air/fuel ratio measurement.
• Flexible Data Connectivity: Provides 0–5V and RS232 outputs for data logging and feedback control, plus AEMnet CANbus for linking multiple controllers.
• Durable, Easy-to-Read Design: Locking connectors, single-board construction, automatic dimming, and interchangeable bezel and faceplate styling support dependable installation and operation.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1