Which of the following is NOT an ASE certification?

Service and maintenance, while important aspects of auto repair and maintenance, is not recognized as a specific ASE (Automotive Service Excellence) certification category. ASE certifications are designed to validate an individual's proficiency in specialized areas of automotive repair and service.

The correct classifications include automatic transmission/transaxle, engine repair, and suspension and steering, which are all distinct areas of expertise evaluated through ASE testing. Each of these certifications focuses on particular skills and knowledge necessary for professional automotive technicians. The absence of a specific category for general service and maintenance reflects the ASE's focus on more defined specialties within the automotive industry.