X-Series Wideband UEGO AFR Sensor Gauge

Fitment

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Description

AEM 30-0300 combines a 52 mm X-Series wideband controller with an AFR, lambda and oxygen-percentage display. Analog, RS-232 and AEMnet CAN outputs connect to compatible engine-management or logging equipment.

Technical specifications

Mounting cup 52 mm Bezel diameter 61 mm Overall depth 21 mm; cup depth: 5 mm Analog output 0.5–4.5 V valid range corresponds to 8.5–18.0 gasoline AFR Analog scaling AFR = 2.375 × volts + 7.3125 Outputs Differential analog, RS-232 and AEMnet CAN Power wiring Switched 12 V with 5 A fuse and ground Application and compatibility

Custom installation requires a 52 mm mounting location, suitable exhaust sensor placement and power wiring. Supports compatible ECU or logger inputs through analog, RS-232 and AEMnet CAN outputs.

Manufacturer documents

Manufacturer product information

AEM 30-0300 instructions — AEM/FAE sensor version

AEM 30-0300 instructions — legacy Bosch version

Key features

• Configurable, auto-dimming display
• Factory resistor calibration with optional free-air calibration
• 52 mm mounting cup with a shallow profile
• Black bezel and reversible black faceplate

Specifications

General

What's in the box

• X-Series wideband gauge
• Wideband oxygen sensor and sensor cable
• Power/IO cable
• Mild-steel weld-in sensor bung
• Mounting bracket, two nuts and rubber mounting band
• Four insulated butt connectors

Sensor type varies by production revision. Confirm the supplied sensor before ordering a replacement. Silver/white appearance kit and no-weld clamp kits are sold separately.

Install & Results

At a glance

• Use the instruction version matching the shipped sensor/controller. Keep the sensor harness uncut and protected from exhaust heat. Manual requires a leak-free exhaust, sensor downstream of any turbo and upstream of catalyst, and a sensor angle over 10° from horizontal. See full placement instructions before welding. The gauge is not waterproof; provide a dry mounting location.