My E90 335i MT, March 2007 build, had the HPFP replaced with the #170 part and the the updated software.
Also had the last dealer oil change, brake fluid, and microfilter replacement completed.
Unfortunately I do notice turbo lag now. Exhaust note is lower at idle. The lag is not horrible, but it is not something I am imagining either.
I am not sure if I should live with the change, or should I take it back to the dealer and request the 'wastegate control' option. Will they even know what this is anymore?
Annoying that this is still an issue after all these years!