I was expecting an epic fight to get the old one out but as soon as it saw the massive 22mm spanner it gave in with nothing more that a whimper...
It looked as if it had been happily sitting in the downpipe for many years too...
The old one had a black connector with a different key to the green connector on the new one. I just chopped off the key on the green connector and it fitted a treat...
I watched closely on my ELIT and note that the system swaps from open-loop to closed-loop mixture regulation (i.e. starts to take notice of the oxygen sensor) when the coolant temperature is at exactly 60 degrees...
The new sensor certainly cycles between low (20mV) and high (950mV) a lot faster than the old one...
A test drive finds sally running beautifully... Let's hope her little hesitation problem are now in the past
If not, next up to swap is the coolant temperature sensor...
Sally will be getting a new exhaust all the way back from the cat for Christmas... If she doesn't she'll not get a new MoT in January...