Agreed. A bit of a fizzog, I think. I'd like to know what really failed. Can you get a look at your original turbo and/or take it to a specialist fro a 2nd opinion? Short of crook bearings or a spindle that dried up through lack of lubrication, and which maybe caused all your compressor vanes to self-destruct, there is bugger all that can go wrong with them. They have to be the simplest contraptions ever made. The art is in the volute and vane design, not so much in the mechanicals. And what took them to the crook O2 sensor? Did the sensors get pulled when they removed the pipe to get the turbo off, and maybe cross-threaded on re-installation? More questions than answers from where I sit and I'd be digging deeper.
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