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Turbo Over-boost fault. New turbo and filter replaced

(2004 BMW X3)
in Tacoma, WA on February 25, 2013
My x3 had a new turbo as it was loosing power on hills and even on motor at around 70mph. New turbo was from a good quality re-manufacturer and fully test all of their units. I told the mechanic it was still loosing power straight away and they tested it and said the fault code was 'over-boost' and they said it was definitely the new turbo - however my concern is that the fault i experience when driving is exactly the same as before the new turbo. I have booked the car in with a different mechanic and am asking him to check vacuum hoses, turbo sensor and turbo actuator arm? Can anyone help with what else i should get him to check, or i can even check myself????

Thank you for your time
Alex
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Popular Answer
of Greg's Orange Auto on February 25, 2013
you are doing the right thing. are you taking to a german mech or dealer?
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