aiya agent's service advisor is always like that wan lah, whenever we highlight probs to them they will blame the cause of it to our 3rd party mods/accs...
i encounter once when i send in my car to ubi ctr i complained of excessive vibration goin on when start engine, the advisor did a dianostic & charge me $60+ for it.
Ended up say his handheld thingy shows no fault or error detected & carry on by blaming that its the aftmkt suspensions that is the cause of it...
Damnz end up was the drive shaft issue, thus causin all the vibrations ...