While it is clear that a responsible tuner has a duty of care not to carry out procedures on a vehicle that is
obviously in an unfit state for tuning, it is reasonable to expect that the owner of the vehicle has a reciprocal
responsibility to not knowingly submit a vehicle for remapping with latent defects that could be exacerbated
or cause further damage. As such, it is normal practice to sign a damage waiver before a vehicle’s output is
measured on a rolling road dynamo-meter. If the owner is uncertain of their vehicle’s state of repair, they
should ensure that the tuner is qualified to carry out an inspection or assessment and, if necessary
systematic fault-finding, diagnosis and remedial work. This is made much easier by the ready availability of
on-board diagnostic interfaces, a diagnostic scan plus check on the vehicle’s maintenance history should be the starting points
for any pre-tuning assessment.