Oxygen Sensor for 2004-2005 Mazda 3 & More - DENSO 234-4390

$105.99
DENSO Auto Parts Oxygen Sensor 234-4390
DENSO Auto Parts Oxygen Sensor 234-4390

Vehicles this part fits
    Part number: 234-4390
    UPC: 042511114289
    Condition: New
    Weight: 0.25 LBS
    Item Package Code: EA
    Part Has Core (Y/N): N
    Item Package Quantity: 1
    $105.99
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    DENSO Auto Parts Oxygen Sensor P/N:234-4390
    DENSO Auto Parts Oxygen Sensor P/N:234-4390
    $105.99
    $105.99

    DENSO Auto Parts 234-4390 oxygen sensor for the 2004-2005 Mazda 3 4-cylinder 2.0L or 2.3L and other vehicles measures oxygen in the exhaust for the engine computer. This sensor works downstream in the exhaust.

    • Laser-welded stainless housing that resists corrosion
    • PTFE filter that blocks contaminants under harsh engine conditions
    • Dual-layer protection around the ceramic element for fast, reliable response times
    • Aluminum oxide trap layer that protects the ceramic element from silicone and lead poisoning
    • Heated, narrow-band sensor type

    Quick facts

    • Part: DENSO Auto Parts 234-4390 oxygen sensor
    • Fits: 2004-2005 Mazda 3 4-cylinder 2.0L or 2.3L and other vehicles
    • Position: Downstream
    • Condition: New

    A check engine light, a change in fuel economy or rough running can mean the oxygen sensor is worn, though the catalytic converter or the sensor's wiring can be behind the same signs, so find the cause before replacing it.

    Fits

    It is a direct-fit replacement for the 2004-2005 Mazda 3 4-cylinder 2.0L or 2.3L and the 2006-2007 Mazda 5 4-cylinder 2.3L. For a 2004 Mazda 3 4-cylinder 2.0L or 2.3L, this same oxygen sensor suits either engine.

    Specifications

    Fit and size

    • Position: Downstream
    • Quantity per vehicle: 1
    • Thread diameter: 0.708 in
    • Wiring harness length: 31.10 in
    • Mounting type: Threaded

    Build and materials

    • Sensor type: Narrow-band, heated
    • Wires: 4
    • Connector gender: Female
    • Condition: New
    • Country of origin: United States

    In the box

    One oxygen sensor. This listing is one downstream sensor, and the engine needs just the one.

    This part cross-references / interchanges with the following part numbers:

    213-3889, 13770, 15776, 15922, ES20371, L3A118861C, L3A118861C9U, L3K218861A, L3K218861B9U, LF6818861D, LF6818861D9U, 24232, SG1736, 250-24661, 350-34182

    Frequently Asked Questions

    Is DENSO Auto Parts 234-4390 an oxygen sensor replacement for the 2004-2005 Mazda 3 4-cylinder 2.0L or 2.3L?

    Yes. DENSO Auto Parts 234-4390 is a direct-fit downstream sensor for the 2004-2005 Mazda 3 4-cylinder 2.0L or 2.3L, and the same part covers both engines.

    Does this work as an oxygen sensor on the 2006-2007 Mazda 5 4-cylinder 2.3L?

    Yes. The DENSO Auto Parts 234-4390 downstream oxygen sensor is listed for the 2006-2007 Mazda 5 4-cylinder 2.3L.

    Is this DENSO downstream oxygen sensor sold singly?

    Yes. This listing is one downstream oxygen sensor, and the engine needs just one.

    How long is the wiring harness on this oxygen sensor, and how many wires does it have?

    The harness is 31.10 inches long with 4 wires and a female connector. The threaded mount has a 0.708-inch thread diameter.

    What does the aluminum oxide trap layer in this DENSO oxygen sensor do?

    It is designed to protect the ceramic element from silicone and lead poisoning. A PTFE filter also blocks contaminants, and a dual-layer shield surrounds the element.

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