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    Sale!

    Holley Bosch Wideband Oxygen Sensor, 18mm x 1.5 Thread, Screw-In | 534-198

    Vendor: Holley EFI
    Part Number: 534-198
    Save $50
    Sale Price $399.95 Regular Price $449.95

    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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    This Bosch wideband oxygen sensor is a replacement/service part for Holley's Commander 950 wideband controller kits, giving the ECU accurate air/fuel ratio feedback for closed-loop tuning.

    Specifications:

    • Sensor Type: Lambda Wide Band
    • Brand: Bosch
    • Mounting Style: Screw-In
    • Thread Size: 18mm x 1.5
    • Connector Color: Black
    • For Use With: Commander 950 Wideband Controller Kits
    • Part Number: 534-198

    This is a replacement/service part and does not include the Commander 950 controller.

    FAQ

    What is the 534-198 sensor used for?

    It's a replacement Bosch wideband oxygen sensor for Holley Commander 950 wideband controller kits.

    What thread size does it use?

    It uses an 18mm x 1.5 screw-in thread.

    Does it include the wideband controller?

    No, this is a replacement/service sensor only — the Commander 950 controller is sold separately.

    What connector color does the sensor have?

    Black.

    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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