• OE:
    • 250-54127, 25054127
    Q&A:
  •  
  • Q:What is Differences Between upstream and downstream O2 Sensor?
  • A:
  • O2 Oxygen Sensor for Nissan Altima 2019 2020 2021 2021 L4 2.5L DOHC Upstream

    OE:

    • 250-54127, 25054127

    Q&A:

     

    Q:What is Differences Between upstream and downstream O2 Sensor?

    A:

    • The upstream oxygen sensor is located before the catalytic converter. This measures the level of pollutants coming directly from the engine. It also senses any raw, unburned fuel coming from the combustion chambers.
    • The downstream oxygen sensor is located directly after the catalytic converter. This sensor measures the pollutants making it through the converter and out of the tailpipe. The data from this sensor is compared to that of the upstream sensor. If the data between the two sensors becomes more similar, the vehicle's computer may trigger a catalyst inefficiency check engine code, which turns on the Check Engine light.

     

    Q:When should I replace oxygen sensor ?
    A:If the car fuel consumption increased significantly, the oxygen sensor failure likely, should check the sensor.

     

    Type of Oxygen Sensor

    Range of Year

    Service Interval (Advice)

    Unheated 1 or 2 Wires

    1976 to Early-1990's

    30000 to 50000 km

    Heated 3 or 4 Wires

    Mid-1980's to mid-1990's

    60000 km

    Modern 4 or 5 wires

    Mid-1990's to Now

    100000 km

     

    Q:What is a California emissions sensor? How do I know if I need one?

    A:

    • A California emissions O2 sensor is meant for vehicles that are designed to meet California emission regulations. Such vehicles should have a sticker under the hood or on the driver’s door jamb that identify them.

     

    Q:How should I notice when install oxygen sensor ?
    A:

    • Remove the tools: wrench M22
    • Before install,make sure installation location surface cleaning
    • Oxygen sensor installation torque is 40 ~ 50 nm, and the installation of the fat use regulations 
    • Fixed through the clamp,if wiring harness is longer than the original

    "



    Payment

    We will only ship to the confirmed shipping address given with the payment.

    We do not offer local pickups.

    Shipping

    1. Orders processed within 24 hours of payment verification.(if you want cancel orders or change address pls contact us within 6 hours after payment,or we are not responsible for shipping a replacement.)

    2. The images shown are not the actual item and are for your reference only.

    3. Fast shipping:All our packages use USPS Package Service

    4. If you have not received your shipment within 15 days from payment , please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction!

    Returns

    1. You have 7 days to contact us and 10 days to return it from the date it was received.

    2. All returned items must be in the original packaging and you must provide us with the shipping tracking number, specific reason for the return, and item custom lable.

    3. We will refund your full winning bid amount, upon receipt of the item in its original condition and packaging with all components and accessories included, AFTER both Buyer and Seller cancel the transaction from eBay. OR, you may choose to have a replacement.

    Contact Us

    We are always been trying to provide best service and reliable products for every customer.


    If you are satisfed with the product you recieved,please leave us positive feedback.


    If you are not satisfied for any reason, please do not be quick to leave negative or neutral feedback.We will work hard to make sure every customer 100 percent satisfied, and reslove any problem for you.

    Shop Category
    O2 Oxygen Sensor for Nissan Altima 2019 2020 2021 2021 L4 2.5L DOHC Upstream

    OE:

    • 250-54127, 25054127

    Q&A:

     

    Q:What is Differences Between upstream and downstream O2 Sensor?

    A:

    • The upstream oxygen sensor is located before the catalytic converter. This measures the level of pollutants coming directly from the engine. It also senses any raw, unburned fuel coming from the combustion chambers.
    • The downstream oxygen sensor is located directly after the catalytic converter. This sensor measures the pollutants making it through the converter and out of the tailpipe. The data from this sensor is compared to that of the upstream sensor. If the data between the two sensors becomes more similar, the vehicle's computer may trigger a catalyst inefficiency check engine code, which turns on the Check Engine light.

     

    Q:When should I replace oxygen sensor ?
    A:If the car fuel consumption increased significantly, the oxygen sensor failure likely, should check the sensor.

     

    Type of Oxygen Sensor

    Range of Year

    Service Interval (Advice)

    Unheated 1 or 2 Wires

    1976 to Early-1990's

    30000 to 50000 km

    Heated 3 or 4 Wires

    Mid-1980's to mid-1990's

    60000 km

    Modern 4 or 5 wires

    Mid-1990's to Now

    100000 km

     

    Q:What is a California emissions sensor? How do I know if I need one?

    A:

    • A California emissions O2 sensor is meant for vehicles that are designed to meet California emission regulations. Such vehicles should have a sticker under the hood or on the driver’s door jamb that identify them.

     

    Q:How should I notice when install oxygen sensor ?
    A:

    • Remove the tools: wrench M22
    • Before install,make sure installation location surface cleaning
    • Oxygen sensor installation torque is 40 ~ 50 nm, and the installation of the fat use regulations 
    • Fixed through the clamp,if wiring harness is longer than the original

    "



    We will only ship to the confirmed shipping address given with the payment.

    We do not offer local pickups.

    1. Orders processed within 24 hours of payment verification.(if you want cancel orders or change address pls contact us within 6 hours after payment,or we are not responsible for shipping a replacement.)

    2. The images shown are not the actual item and are for your reference only.

    3. Fast shipping:All our packages use USPS Package Service

    4. If you have not received your shipment within 15 days from payment , please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction!

    1. You have 7 days to contact us and 10 days to return it from the date it was received.

    2. All returned items must be in the original packaging and you must provide us with the shipping tracking number, specific reason for the return, and item custom lable.

    3. We will refund your full winning bid amount, upon receipt of the item in its original condition and packaging with all components and accessories included, AFTER both Buyer and Seller cancel the transaction from eBay. OR, you may choose to have a replacement.

    We are always been trying to provide best service and reliable products for every customer.


    If you are satisfed with the product you recieved,please leave us positive feedback.


    If you are not satisfied for any reason, please do not be quick to leave negative or neutral feedback.We will work hard to make sure every customer 100 percent satisfied, and reslove any problem for you.


    Copyright of autoutdoor. All rights reserved.