Following trainings would help to gain necessary competence and qualify as Internal auditor for IAF16949.
Internal auditor training for IATF16949:2016, ISO 9001:2015
Training on core tools (MSA, SPC, PPAP,
FMEA, SPC,
APQP & Control Plan).
Training on customer specific requirements.
But, competence evaluation is required prior to selection as an Internal auditor (Refer clause 7.2.3 for competency requirements) even after training.
Thanks,
Amit