Advanced ASE specialty test for diagnosing complex driveability and emissions issues across modern vehicles.

Who needs it

Diagnostic specialists, lead techs, and anyone who wants to be the person other techs call when they're stuck.

How to get it

Hold a current ASE A8 (Engine Performance), then pass the L1 exam at a Prometric test center.

Cost

$103 (L1 is a longer test) + $39/yr registration.

Where to start

ASE — L1 Advanced Engine Performance ↗