Cheers for the replies lads. I was thinking that a first port of call was to clear the codes (if not already cleared), clear all the adaptations on DME & see how they go.

I've priced a NOX at €355 plus delivery here, I know someone who uses the site regularly:

http://www.carparts-pros.com/page_1_3.php#oeformo

Search Part number: 11 78 7 587 130

http://bmwfans.info/parts-catalog/11787587130

I'll suggest changing spark plugs as a next step after resetting the codes, it will be a cheap test to do & they need to be done anyway.

If that doesn't resolve the hesitation & the NOX error comes up I'll let him decide if he wants to try the NOX.
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Quote Originally Posted by Valdelisbmw
have replaced by one or by two and all running fine ,coding recommended as well
Is that coding for the NOX sensor or the new injectors?