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    • Bosch LSU 4.9 Replacement UEGO Sensor Bosch LSU 4.9 Wideband UEGO Replacement Sensor AEM Electronics
    • Bosch LSU 4.9 Replacement UEGO Sensor Bosch LSU 4.9 Wideband UEGO Replacement Sensor AEM Electronics
    • Bosch LSU 4.9 Replacement UEGO Sensor Bosch LSU 4.9 Wideband UEGO Replacement Sensor AEM Electronics
    • Bosch LSU 4.9 Replacement UEGO Sensor Bosch LSU 4.9 Wideband UEGO Replacement Sensor AEM Electronics
    • Bosch LSU 4.9 Replacement UEGO Sensor Bosch LSU 4.9 Wideband UEGO Replacement Sensor AEM Electronics
    • Bosch LSU 4.9 Replacement UEGO Sensor Bosch LSU 4.9 Wideband UEGO Replacement Sensor AEM Electronics
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    Sale!

    AEM Bosch LSU 4.9 Replacement Wideband UEGO Sensor | 30-2004

    Vendor: AEM Electronics
    Part Number: 30-2004
    Save $9
    Sale Price $155.95 Regular Price $164.95

    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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    AEM's Bosch 4.9LSU Wideband UEGO O2 replacement sensor kit includes only the sensor, with attached cable and male connector, and is intended to replace an existing mounted wideband sensor used with AEM wideband air/fuel UEGO controllers. This product carries a California Proposition 65 warning per the manufacturer's data.

    These sensors have a laser-etched, calibrated resistor in the connector body that is specifically created for the exact sensor it is attached to; modifying this will invalidate the sensor's output. The wideband sensor is laboratory-calibrated at the Bosch factory, accurate to 0.1 AFR, and never requires free-air calibration when used with an AEM wideband AFR controller.

    Specifications:

    • Sensor Type: Bosch LSU 4.9 wideband UEGO
    • Accuracy: 0.1 AFR, factory calibrated
    • High-quality sealed sensor housing, 360-degree welded wetted area, impervious to automotive fluids
    • Replacement sensor only (no controller included)
    • Warranty: Manufacturer's limited 90-day warranty
    • Part Number: 30-2004

    FAQ

    Does this sensor require free-air calibration?

    No, it never requires free-air calibration when used with an AEM wideband AFR controller, since it is factory calibrated at the Bosch factory to 0.1 AFR accuracy.

    What is included with this kit?

    It includes only the replacement sensor with attached cable and male connector - no controller is included.

    What is the warranty on this sensor?

    It carries the manufacturer's limited 90-day warranty.

    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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