• AEM X-Series OBDII Wideband UEGO AFR Controller Gauge, Black Bezel | 30-0334
    • AEM X-Series OBDII Wideband UEGO AFR Controller Gauge, Black Bezel | 30-0334
    • AEM X-Series OBDII Wideband UEGO AFR Controller Gauge, Black Bezel | 30-0334
    • AEM X-Series OBDII Wideband UEGO AFR Controller Gauge, Black Bezel | 30-0334
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    AEM X-Series OBDII Wideband UEGO AFR Controller Gauge, Black Bezel | 30-0334

    Vendor: AEM Electronics
    Part Number: 30-0334
    Save $67.99
    $269.96 $337.95

    Available to order. In-stock orders typically ship in 1 to 2 business days.

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    Accurate AFR data is critical when tuning an engine: running too rich causes a loss of power, while running too lean can cause serious engine damage. AEM's X-Series OBDII wideband UEGO AFR controller gauge lets users monitor AFR during tuning and adjust parameters for maximum power and efficiency.

    Installation Instructions

    Specifications:

    • 52mm gauge diameter and slim 0.825in overall depth (cup depth 0.200in)
    • Independently tested as the fastest-responding wideband AFR controller vs. 17 competitors
    • 0-5V and RS232 output for data logging and feedback control
    • AEMnet (CANbus) output for data logging and daisy-chaining up to 16 cylinders
    • OBD-II output, CAN-based, compatible with 2008 or newer vehicles
    • User-configurable display: AFR, Lambda, O2%, and 3- or 4-digit readout
    • Factory-calibrated resistor; free-air calibration available as the sensor ages
    • Includes Bosch 4.9LSU wideband UEGO sensor
    • Patented X-Digital wideband technology (Patent 9,575,030)
    • Black bezel and black dual-faced faceplate (silver bezel/white gauge option sold separately, PN 30-0300-ACC)
    • Part Number: 30-0334

    FAQ

    What does the AEM 30-0334 controller gauge measure?

    It measures and displays real-time air/fuel ratio (AFR), Lambda, or O2%, helping identify overly rich or lean conditions during tuning.

    Which vehicles is the OBD-II output compatible with?

    The CAN-based OBD-II output is compatible with 2008 model year or newer vehicles.

    Does it include the wideband sensor?

    Yes, it includes a Bosch 4.9LSU wideband UEGO sensor with a factory-calibrated resistor.

    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy
    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy
    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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