I have a few codes that say I need to replace what looks like 4 O2 sensors, these are 0162 0142 1167 1142. These codes translate to bank 2 sensor 3, bank 1 sensor 3, bank1 sensor 1 and bank 1 sensor 2. Am I right in saying that bank 1 is the drivers side (on the right side sitting inside the car)? I suspect that sensor 1 would be nearest the engine before first the cat in the downpipe, and sensor 2 would be after the first cat and before the second cat and sensor 3 would be after the second cat, is this correct? What are your thoughts on universal sensors? I have spent too much on this car already without spending another £400+ and the difference between that and spending less than half that will be the difference between me keeping it, and it been on e-bay next week.