c4 2009

[autotechnique]

hello best freinds i have citroen c4 model 2009 i want to change his meleage but i cant make it with my tacho softs and nyo4.
old meleageis 189xxx km and i like to change it to 74000km
please if someone can help me.85787
and thanks in advance.

[z786]

how much u charging for this job