Hi Mark. You are correct about the squenence. In this case no match was found and in the book the lambda reading are as stated. After phoning VOSA and being told that this should not pass I left it at that. I have since found out today that the new tester update will fix this 100%.I am annoyed with the bmw garage but will not go so far as to report them. If they get found out, good, but I doubt it. I was told by Boston,our machine supplier that the confusion is due to BMW not informing VOSA 3 years ago. I phoned the VOSA helpline and this time the guy was very helpful and said I should pass, if co is ok, with our readings and put on the sheet 'tested before uodate'. Thanks for your input. Cheers Les