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OEM Auto Oxygen Sensors

Your vehicle's oxygen sensors play an important role when it comes to performance. Also called lambda sensors, they measure the oxygen levels in the vehicle's exhaust gases. That information is then passed along to an engine control unit (ECU). The ECU adjusts levels as needed to ensure that your engine runs its best.

Your vehicle has at least two oxygen sensors, if not four. One is located in front of the catalytic converter, and known as the upstream sensor. The other(s) can be found in the exhaust manifolds, and are referred to as(downstream sensors.

The upstream sensor monitors how efficiently your engine combusts the air-and-fuel mix. That data is relayed to the ECU, which determines the optimal mix needed. An ECU also uses the readings from the downstream sensor(s) and compares them to the upstream sensor readings to verify consistency. If the readings don't match, a diagnostic error code may pop up.

How to Spot Oxygen Sensor Problems

If your oxygen sensors go bad, the ECU is forced to guess the ideal air-to-fuel ratio. That's not good. Signs of failure include:

  • The smell of rotten eggs in the air
  • Poorer fuel efficiency
  • The engine idles rougher than usual
  • You have emissions issues
  • The "Check Engine" dash light comes on
  • Buy From Our Online Parts Store And Save Up To 35% On Genuine OEM Oxygen Sensors

    An engine repair can cost thousands of dollars, so it just makes sense to replace a failing oxygen sensor as soon as possible. The ones made by your manufacturer were designed specifically for your vehicle, ensuring the trustworthy fit and performance you want. Our online auto parts store has them in stock and priced well below the MSRP. Browse by make, model, and model year to find your compatible options. Buy today and we'll get your order shipped right out!

    36538P8AA01 - : Oxygen Sensor Clip for Acura Image

    Oxygen Sensor Clip

    4 cylinder.
    $7.60
    MSRP $10.05
    Save $2.45
    24.4% Off
    392112C130 - : Oxygen Sensor Bracket for Hyundai Image

    Oxygen Sensor Bracket

    Hyundai 39211-2C130
    2.0L.
    $11.68
    MSRP $15.19
    Save $3.51
    23.1% Off
    226509FV0B - : Oxygen Sensor Bracket for Nissan Image

    Oxygen Sensor Bracket

    Nissan 22650-9FV0B
    3.8L.
    $40.43
    MSRP $55.92
    Save $15.49
    27.7% Off
    8946A78030 - : Oxygen Sensor Bracket for Toyota Image

    Oxygen Sensor Bracket

    Toyota 8946A-78030
    2.4L.
    $15.09
    MSRP $19.61
    Save $4.52
    23% Off
    8946704070 - : Ft Oxygen Sensor for Toyota Image

    Ft Oxygen Sensor

    Toyota 89467-04070
    2.7L, auto trans.
    $205.67
    MSRP $292.40
    Save $86.73
    29.7% Off
    CK4Z9G444D - : Rear Oxygen Sensor for Ford Image

    Rear Oxygen Sensor

    3.7L.
    $60.77
    MSRP $93.64
    Save $32.87
    35.1% Off
    CK4Z9G444C - : Rear Oxygen Sensor for Ford Image

    Rear Oxygen Sensor

    3.7L.
    $64.61
    MSRP $101.27
    Save $36.66
    36.2% Off
    68520117AA - : Oxygen Sensor Bracket for Mopar Image

    Oxygen Sensor Bracket

    Mopar 68520117AA
    O2 Sensor Connector.
    $123.05
    MSRP $180.00
    Save $56.95
    31.6% Off
    56041951AA - : Oxygen Sensor, Right for Mopar Image

    Oxygen Sensor, Right

    Mopar 56041951AA
    Before Catalyst.
    $102.01
    MSRP $151.00
    Save $48.99
    32.4% Off
    68229569AA - : Oxygen Sensor Bracket for Mopar Image

    Oxygen Sensor Bracket

    Mopar 68229569AA
    Downstream Right After Catalyst. Right Hand After Catalytic Converter. After Catalyst Right Side.
    $12.03
    MSRP $15.95
    Save $3.92
    24.6% Off
    68429412AA - : Oxygen Sensor Bracket for Mopar Image

    Oxygen Sensor Bracket

    Mopar 68429412AA
    Upstream.
    $4.16
    MSRP $5.65
    Save $1.49
    26.4% Off
    68510745AB - : Oxygen Sensor Bracket for Mopar Image

    Oxygen Sensor Bracket

    Mopar 68510745AB
    $4.28
    MSRP $5.70
    Save $1.42
    24.9% Off

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