O2 sensor replacement

JESSICA MERTENS

MEMBER
2011 HYUNDAI SONATA
2.4L
4 CYL
2WD
AUTOMATIC
160,000 MILES

A code came up on my car for 02 sensor that said bank 1 sensor 2. I'm wondering how to know which one is correct when I look it up on Napa, O'Reilly's, etc to buy. And also how difficult will this be to replace? Thank you much

5 Replies

AUTOTECHE

MEMBER
1 POST

Hello Jessica, you will be happy to know that this isn't going to be difficult for you to replace at all. If you can get under your car safer and know how to turn a wrench then your going to be just fine. The attachment shows you exactly what you are going to see lying on your back underneath your car. Safety is your best friend and you will need to use your best friend in lifting one side of your car with a jack and placing a solid object like a big block of wood or a jack stand and lower the car onto it. Now with the car in the air slide underneath and find the o2 sensor circled in the attached photo. Take a wrench the same size as the sensor and loosen the sensor a bit and unplug it. Then finish unscrewing it all the way out. Installing the new one might require a special wrench available at any auto parts store to rent for free! Hope this helps !

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Tuesday, June 29th, 2021 AT 3:04 AM

JESSICA MERTENS

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55 POSTS

Okay, how do I know which one to buy at the parts store? Because they need me to find out which one they said.

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Monday, July 5th, 2021 AT 7:53 PM

SQM

MECHANIC
6,383 POSTS

Hello,

Bank 1 Sensor 2 refers to the Oxygen sensor that is after the catalytic converter.
Here is a basic guide to replace a Oxygen sensor:

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

See attached for the diagram that shows the location of the bank 1 sensor 2.

Any questions please let us know.

Thank you.

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Wednesday, July 7th, 2021 AT 1:24 PM

JESSICA MERTENS

MEMBER
55 POSTS

My question is, what is the part number or how will I know if I go to O'Reillys. Com for example how do I know which one to get?

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Thursday, July 8th, 2021 AT 8:10 PM

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

I've attached a picture below of the factory Hyundai Bank 1 Sensor 2 part number. When you go to any of your local auto parts stores just use this number to have them cross reference their aftermarket store brand sensor for you. Hope this helps and thanks for using 2CarPros.

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