AEM X-Series Wideband AFR Gauge & Controller – 52mm

Accurate air/fuel ratio monitoring is essential for extracting maximum performance while protecting your engine from potentially damaging lean conditions. The AEM X-Series Wideband AFR Gauge & Controller combines industry-leading accuracy, lightning-fast response times, and advanced connectivity features into a compact 52 mm gauge package, making it one of the most trusted wideband systems available for performance enthusiasts and professional tuners.

Supplied with a genuine Bosch LSU 4.9 wideband oxygen sensor, the X-Series delivers AFR readings with an accuracy of up to 0.1 AFR, allowing precise fuel tuning for naturally aspirated, turbocharged, and supercharged engines. Whether you're using a standalone ECU, piggyback controller, or external data logger, the integrated 0–5V analogue output provides seamless compatibility with popular engine management systems such as ECUMaster, Link ECU, Haltech, Motec, and many others.

The X-Series controller utilizes AEM's advanced digital processing technology to provide exceptionally fast sensor response and stable AFR readings, helping tuners make more accurate fuel adjustments under all operating conditions. Users can display readings in either AFR or Lambda values, providing flexibility for different tuning preferences and fuel types.

Trusted by professional tuners and motorsport teams worldwide, AEM wideband systems provide the accuracy and reliability required to safely maximize engine performance.

Carefully selected for builders who demand proven performance without compromise.

Why Monitor Air/Fuel Ratio?

Accurate AFR data is critical for engine performance and reliability.

✔ Optimizes fuel delivery for maximum power
✔ Helps prevent dangerous lean conditions
✔ Improves tuning accuracy and consistency
✔ Essential for turbocharged and high-performance applications
✔ Provides valuable real-time engine protection

Key Features

✔ Genuine AEM X-Series Wideband AFR Gauge & Controller
✔ Bosch LSU 4.9 Wideband Oxygen Sensor Included
✔ Exceptional 0.1 AFR Accuracy
✔ Fast-response digital controller technology
✔ AFR and Lambda display modes
✔ 0–5V analogue output for ECU integration
✔ RS232 communication capability
✔ Compact 52 mm gauge design
✔ Suitable for professional tuning and motorsport use

Technical Specifications

✔ Brand: AEM Electronics
✔ Product Type: Wideband AFR Gauge & Controller
✔ Gauge Diameter: 52 mm (2-1/16")
✔ Sensor Type: Bosch LSU 4.9 Wideband Oxygen Sensor
✔ Display Type: Digital LED
✔ AFR Accuracy: ±0.1 AFR
✔ Display Modes:

• AFR
• Lambda (λ)

✔ Analogue Output: 0–5V
✔ Serial Communication: RS232 Compatible
✔ Operating Voltage: Up to 16V Vehicle Systems

Connectivity & Integration

✔ Compatible with ECUMaster ECUs
✔ Compatible with Link ECU Systems
✔ Compatible with Haltech ECUs
✔ Compatible with Motec Systems
✔ Compatible with Data Loggers
✔ Compatible with Most Standalone Engine Management Systems

Benefits of Wideband AFR Monitoring

✔ Safer tuning under boost
✔ Improved fuel economy tuning
✔ More accurate dyno calibration
✔ Real-time fuel mixture monitoring
✔ Early detection of fuel system issues

Package Contents

✔ AEM X-Series Wideband Gauge Controller
✔ Bosch LSU 4.9 Wideband Oxygen Sensor
✔ Wiring Harness
✔ Installation Hardware

Compatible Applications

✔ Turbocharged Vehicles
✔ Supercharged Vehicles
✔ Naturally Aspirated Performance Builds
✔ Drift Cars
✔ Drag Racing Vehicles
✔ Circuit Racing Vehicles
✔ Standalone ECU Applications
✔ Engine Swap Projects

Compatible Engines

✔ 1JZ-GE
✔ 1JZ-GTE
✔ 2JZ-GE
✔ 2JZ-GTE
✔ Toyota Performance Engines
✔ Lexus Performance Builds
✔ Universal Applications

Shipping

🇪🇺 EU Delivery: 5–10 Business Days
🌍 International Delivery: 7–21 Business Days