There is no removal or addition of hardware parts, so there is no visible indication that the car is modified.
Most of the latest diagnostic tools can't find any difference because Engine electronics behave as if it was original.
Local garages usually lack the skills or the equipment to read out the file inside your ECU. To do this, they need to send ECU to the manufacturer.
The PIASINIENGINEERING software update is well-adapted to the existing transmission of your vehicle. It gives the best in performance, acceleration, and drivability.
PIASINIENGINEERING installation does not affect the wear and tear.
How you drive and take care of your vehicle (correct and regular servicing) does affect its conditions.
Generally, software optimization will provide a power increase and a lower fuel consumption.