Oxygen Sensor for 2009-2011 Mazda RX-8 - DENSO 234-4278

$134.99
DENSO Auto Parts Oxygen Sensor 234-4278
DENSO Auto Parts Oxygen Sensor 234-4278 - view 2
DENSO Auto Parts Oxygen Sensor 234-4278
DENSO Auto Parts Oxygen Sensor 234-4278 - view 2

Vehicles this part fits
    Part number: 234-4278
    UPC: 042511117761
    Condition: New
    Weight: 0.27 LBS
    Item Package Code: EA
    Part Has Core (Y/N): N
    Item Package Quantity: 1
    $134.99
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    DENSO Auto Parts Oxygen Sensor P/N:234-4278
    DENSO Auto Parts Oxygen Sensor P/N:234-4278
    $134.99
    $134.99

    DENSO Auto Parts 234-4278 oxygen sensor for the 2009-2011 Mazda RX-8 rotary 1.3L measures the oxygen in the exhaust at the downstream position. The heated, narrow-band sensor is built and tested to strict OE standards.

    • 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 designed to protect the ceramic element from silicone and lead poisoning

    Quick facts

    • Part: DENSO Auto Parts 234-4278 oxygen sensor
    • Fits: 2009-2011 Mazda RX-8 rotary 1.3L
    • Position: Downstream
    • Condition: New

    A check engine light with an oxygen sensor code, or a drop in fuel economy, can mean the sensor is worn. Before you replace it, rule out wiring damage and an exhaust leak near the sensor, since either can throw a similar code.

    Fits

    This direct-fit Mazda RX-8 oxygen sensor is for the 2009-2011 model years with the R2-1.3L rotary engine. The 2009-2011 Mazda RX-8 rotary 1.3L takes one, and this listing is one sensor.

    Specifications

    Fit and size

    • Position: downstream
    • Quantity per vehicle: 1
    • Mounting type: threaded
    • Thread diameter: 0.708 in
    • Wiring harness length: 10.04 in

    Build and materials

    • Sensor type: narrow-band, heated
    • Wires: 4
    • Connector gender: male
    • Condition: new
    • Country of origin: Japan

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

    13595, N3R118861, 24816, 250-24860, 350-34056

    Frequently Asked Questions

    Does the DENSO Auto Parts 234-4278 fit the 2009-2011 Mazda RX-8 rotary 1.3L?

    Yes. DENSO Auto Parts 234-4278 is a direct-fit downstream oxygen sensor for the 2009-2011 Mazda RX-8 rotary 1.3L (R2-1.3L), and the car takes one.

    Is this DENSO Auto Parts oxygen sensor heated?

    Yes. This downstream oxygen sensor is a heated, narrow-band type, so the sensing element has its own heater.

    What thread size and wire length does the 234-4278 have?

    DENSO 234-4278 has a 0.708 in thread diameter and a 10.04 in wiring harness. It has four wires and a male connector.

    Is the 234-4278 an upstream or downstream oxygen sensor?

    Downstream. DENSO 234-4278 is listed for the downstream position, and this listing is one sensor.

    What signs can show a downstream oxygen sensor is wearing out?

    A check engine light with an oxygen sensor code is one sign, and uneven fuel economy is another. A shop can read the codes and test the sensor to confirm.

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