I installed the O2 sensor on my 03 Jaguar, the check engine light was still on, cleared the codes and it showed there was no connection to the O2 sensor. I unplugged the sensor and reconnected it , still showed no connection. I plugged in the old one ( worked intermittently) and it showed connection again. I would like to return it and get a refund.
2004 xj8. Easy to change. Jack side of car up, put on jack stands. Take care to know which side. Found out later that drivers side is passenger side in usa. Use special tool with slot in it.