thanks everyone ! now everything it's clear ! I changed my old 314 BOSCH MAF with the new one (in fact a Pierburg 09 which everybody says is better the bosch 527) and the garage-guy remapped dde with new software, but I realized after the thing that the version number is the old-one still, he remapped only dde maps I think, he don't know nothing about the software version numbers according to bmw TIS Bulletin, so I want to do it my self ... I have power loss in warm weather or when engine gets very hot and I hope that's the cause !