A neighbour has an e93 , 2009 with the 2.0L N46 petrol engine, 62k km on clock.
He was experiencing an occasional hesitation in 2nd & 3rd gear so He brought it to the main dealer to get a diagnosis.
They called out that the NOX sensor (oxygen sensor?) & all four injectors need replacing!
The hesitation is only when first going in to 2nd or third gear. I would have thought that a faulty sensor & all these injector issues would trigger an engine management light. Sounds like pure guess work to me, €1,600 worth of guesswork at that. Surely a faulty injector or a faulty sensor would be very coincidental, never mind all 4 failing! Also is it likely that either one could register spurious fault codes for the other?
Any ideas?

I'm gonna do my own diagnostics tomorrow for him, it just seems very odd to me.