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Home / Tuning & Gauges / Gauges / AEM X-Series Wideband UEGO AFR Sensor Controller Gauge
AEM

AEM X-Series Wideband UEGO AFR Sensor Controller Gauge

PART 30-0300CATEGORY Gauges
$207.86
MSRP $259.95You save $52.09
$207.86
1

Product information

Manufacturer information. Check the part number and installation requirements for your vehicle.

Supplier details checked 2026-09-23 · Test catalog

Some supplier details are unavailable for this product.

Product description

Faster response time improves wideband feedback control, and can provide a safer, more powerful and accurate tune. AEM's Wideband Controllers with X-Digital technology can reduce deadtime and improve the performance of your vehicle through more accurate AFR tuning. Deadtime is the delay between when exhaust gas composition changes and when that change is reported by the O2 sensor. While flow of exhaust gases can affect deadtime, it is not the only source. Often, the sensing element’s respon

X-Series Wideband UEGO AFR Sensor Controller Gauge with patented X-Digital Technology, Includes X-Series Wideband Controller Gauge, Bosch LSU 4.9 Sensor, Wiring Harnesses, Black Bezel, Reversible Black AFR-Lambda Faceplate, O2 Sensor Bung

8.50:1 to 18:1 AFR Scale - Black Bezel - Black Face

AEM X-Series Wideband UEGO AFR Gauge Kit

Features

X-Series Wideband UEGO AFR Controller Gauges were the fastest responding wideband air/fuel ratio controllers in an independent test vs. 17 competitor 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

Black bezel and black double-sided faceplate included (silver bezel/white faceplate option sold separately, PN 30-0300-ACC)

Factory calibrated resistor does not require free-air calibration, but can be free-air calibrated

User-configurable display for changing between AFR, Lambda, and O2%, and 3- or 4-digit display

52mm gauge diameter and slim 0.825" gauge depth(Gauge cup depth only .200" deep)

Auto-Sensor Detection between AEM FAE and Bosch LSU 4.9 wideband sensors

Patented X-Digital wideband technology (Patent 9,575,030)

Compatible with supply voltages up to 16V

Auto-dimming feature

Supplier category
Gauges & Pods
Supplier subcategory
Gauges
UPC / barcode
840879024437
Units per product
1
Supplier Proposition 65 status
Y
Supplier EPA status
N/A
Air freight prohibited
No
Not CARB approved
No
CARB acknowledgement required
No
Freight delivery required
No
Powersports product
No

Manuals and documents

More manufacturer information

Other product descriptions

AEM X-Series Wideband UEGO AFR Sensor Controller Gauge

AEM - X-Series AFR Gauge

XSeries Wideband AFR

X SERIES UEGO GAUGE

X-Series AFR Gauge

About the manufacturer

Faster response time improves wideband feedback control, and can provide a safer, more powerful and accurate tune. AEM's Wideband Controllers with X-Digital technology can reduce deadtime and improve the performance of your vehicle through more accurate AFR tuning. Deadtime is the delay between when exhaust gas composition changes and when that change is reported by the O2 sensor. While flow of exhaust gases can affect deadtime, it is not the only source. Often, the sensing element’s response to the gas is the largest contributor to deadtime.When tuning an engine using wideband AFR feedback control, deadtime affects the data you are looking at because it is reported in a different operating location than when it occurred. This means whatever changes you make to the base fueling will likely be in the wrong timeframe. This can be particularly dangerous to high cylinder pressure applications, and EFI systems that use feedback control.

The X-Series Wideband AFR Gauge (PN AEM 30-0300) mounting surface measures 2 1/16th-inch (52mm) in diameter and features a modern center display that is 87% larger than the 30-4110 AEM Wideband Gauge's center display. Its slim depth (less than one inch overall) dramatically increases its application base and potential mounting locations.The AEM Wideband X-Series AFR Gauge has a user configurable display via buttons on the gauge face that allows you to change between AFR, Lambda, or O2%, change the center display to three or four digits, perform a free-air calibration if desired, and change the CAN message ID when linking multiple X-Series Wideband Controllers.

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. The controller's high-speed digital implementation ensures no loss of signal fidelity and full transient response, making it able to identify the slightest fluctuations in AFR and output them in full value.

AEM co-developed its new wideband sensor with global automotive supplier FAE, culminating in a new design that has a faster response time and is less prone to failure in high performance vehicles. It can be used on EFI or carbureted applications, and in fuel systems using gasoline (including leaded race gas), methanol, ethanol, diesel, propane, and CNG.

AEM's X-Series Wideband Air/Fuel Ratio Sensor Controllers are built upon unique, patented X-Digital technology (Patent 9,575,030), making them the fastest responding wideband air/fuel ratio controllers in independent testing*.

X-Series Wideband UEGO AFR Sensor Controller Gauge with X-Digital Technology. Includes: X-Series Wideband Controller Gauge, Bosch LSU 4.9 Sensor, Wiring Harnesses, Black Bezel, Black AFR/Lambda Faceplate & O2 Sensor Bung

WHY RESPONSE TIME MATTERS

X-DIGITAL TECHNOLOGY

Additional manufacturer information

Air / Fuel Ratio Gauge

Gauge Kit

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