Review on Oxygen Sensor 11787558087 For 2007-2016 BMW Z4 1 Series M 135I 335I 335Is 335Xi XDrive - HiSport Wideband O2 Replacement by Demetrio Lowe

I was getting a P0420 code on my 2014 Ford Focus so I decided to replace both the upstream and downstream O2 sensors, spark plugs, purge canister valve and spark plugs. After replacing all these parts I started getting P219A code. I took the car to Ford and they replaced the catalytic converter which took care of the P0420 code but I was still getting the P219A code. I started to think I had an injector problem. Before replacing injectors I decided to buy an upstream OEM O2 sensor. This fixed the problem. These sensors are junk. Stay away from them. I am past the return date so I am out the cost of the sensor and time involved troubleshooting the problems