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Fastest Responding Wideband AFR Feedback For Serious Tuning
Accurate air/fuel ratio feedback is only useful if it arrives fast enough to matter. The AEM AEM30-0300NS uses patented X-Digital technology to reduce deadtime and report AFR changes with less lag than 17 competing wideband controllers tested independently, giving tuners cleaner data to work from.
Key Features
- Patented X-Digital wideband technology for fast, accurate AFR reporting
- Auto-sensor detection between AEM FAE and Bosch LSU 4.9 wideband sensors
- Center display 87 percent larger than AEM's previous wideband gauge
- User configurable display between AFR, Lambda, or O2 percent readouts
- 0-5V and RS232 output plus AEMnet CANbus for data logging and daisy-chaining
- Compatible with EFI and carbureted applications on gasoline, race gas, methanol, ethanol, diesel, propane, and CNG
- Sold without a wideband sensor for installers supplying their own or replacing an existing sensor
Specifications
| Detail | Value |
|---|---|
| MPN | AEM30-0300NS |
| UPC | 840879024437 |
| Mounting Diameter | 2 1/16in (52mm) |
| Gauge Depth | 0.825in |
| AFR Scale | 8.50:1 to 18:1 |
| Voltage | Up to 16V supply |
| Outputs | 0-5V, RS232, AEMnet CANbus |
| Sensor Included | No |
| Warranty | Manufacturer 1 year warranty |
What's Included
- 1 AEM X-Series Wideband UEGO AFR gauge controller
- Black bezel and black double-sided faceplate
- Wiring harness and mounting hardware
About AEM
AEM Performance Electronics has engineered engine management and gauge products for street and race applications for decades. The X-Series wideband lineup was co-developed with global sensor supplier FAE to deliver faster response and greater reliability in high performance vehicles.
Related Parts on Our Site
- AEM wideband oxygen sensors
- AEM Infinity and Series 2 engine management systems
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FAQ
What is the AEM30-0300NS?It is the AEM X-Series Wideband UEGO AFR gauge sold without a wideband sensor, for tuners who already have a compatible sensor or need a replacement gauge.
Does this gauge come with a wideband sensor?No, this version is sold without a sensor. A compatible AEM FAE or Bosch LSU 4.9 sensor must be purchased separately.
What fuels does this gauge support?It works with gasoline including leaded race gas, methanol, ethanol, diesel, propane, and CNG.
What is the AFR reading range?The gauge displays air/fuel ratio across an 8.50:1 to 18:1 scale.
Can multiple gauges be linked together?Yes, the AEMnet CANbus output allows daisy-chaining multiple X-Series controllers for logging across multiple cylinders.
Does this gauge require free-air calibration?No, it ships factory calibrated, though free-air calibration can still be performed if desired.
What size mounting hole does this gauge need?The gauge mounts in a standard 2 1/16in (52mm) diameter opening.
Is this gauge legal for street use?Yes, it is legal for emissions controlled vehicles, non-emissions controlled vehicles, and racing use only vehicles since it does not affect emissions.
Install Instructions
- Choose a mounting location with a 2 1/16in opening and mount the gauge cup
- Install a compatible wideband sensor in the exhaust and run its harness to the gauge location
- Connect the gauge to switched 12V power, ground, and the sensor harness per the included wiring diagram
- Route AEMnet CANbus wiring if daisy-chaining additional controllers
- Power on the gauge and allow the sensor to complete its warm-up cycle
- Configure display mode, digit count, and CAN message ID using the front buttons as needed
AEM
AEM Electronics is a California-based manufacturer of performance automotive electronics specializing in engine management, air/fuel ratio monitoring, data acquisition, and water/methanol injection systems. AEM products are engineered for motorsports applications and used by professional race teams as well as enthusiast builders who need accurate, reliable data and precise engine control. Popular AEM Electronics Products AEM's product line includes the Infinity and Series 2 standalone engine management systems for custom EFI builds, the X-Series UEGO wideband air/fuel ratio controllers and gauge-mounted sensors, the CD-5 and CD-7 carbon fiber digital racing dash displays with data logging capability, the Series 2 water/methanol injection systems for charge cooling and detonation control, the Dryflow and Brillo cold air intake systems, the 320 LPH and 400 LPH high-flow fuel pumps, and the Series 2 and GSS340 inline fuel pump modules for fuel system upgrades. What is the AEM Infinity ...
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