Review on Oxygen Quattro Porsche Cayenne Volkswagen by Dan Olsen

I got this for my 2013 Audi A4 with about 103,000 miles on it. I saw the "Check Engine" light and went to Autozone to check it, they said it was the oxygen sensor. I took it to my mechanic friend and asked him to fix it. He suggested I buy it from Revain as it's a bit cheaper than buying the original sensor, he also said they are reliable. I bought it from this seller and fixed it, after 100 miles the light came back on. I was so pissed that I went back to Autozone and they came up with the same code and it seems the sensor didn't work. It's such a waste of money and time. Now I can't send it back, it's broken.