Kwiksen Downstream Left Right Oxygen Sensor O2 Sensor 2, 234-4048 Replacement (Pack of 2)

I got these 2 days ago. I installed them myself, ive nerver done it befor and it wasnt that complicated. I used wd40 to loosen the old ones. I unpluged the power, security clips and put the new one. These come with the gel already. My only issue is the clips to secure the new 02 cord. Check engine light is gone. By buying from these company i saved $350 and another $200 for doing it my self. You do need to buy a special 3/8 socket to take take the old and put the new. I decided to buy a mechanica tool box. I all i saved $470 amd it took me one hour at a very relaxed pace. Its very easy to take out and to install. You just get a little dirty, wear gloves and youll be okay. I recommend these. In case they fail i will update review but feels good now.

Stopped working day fourI ordered two of them upstream left and upstream right. When they came they had different SKU numbers on the box. That cost me an extra $67 beyond what I paid. Set stranded for the weekend. If you’re going to order these order one at a time a week apart because there is not a single thing on the box to tell which one it is they all come in the exact box with no way to identify what is what.

new catalytic converter and all new o2 sensors lasted 4 days and check engine light came on,,,,did this on my 2002 Tacoma too need to learn spend a little more and get OEM

In less a year, the sensor is faulty again with P0136 code on my Toyota Rav4. Don't buy it. I'll get a denso.

Not even a month in and they aren’t working properly. Amazon should be ashamed to let someone sell something like this look at all the reviews

they work great

Do your self a favor, replace all your o2 sensor (x4) (2002 Rav4), for 134 dollars. It will save you time and money. If one starts to fail they eventually all go bad.

Good quality. Check engine light finally fixed