Repair Technician Training
Registered Emissions Repair Technician Training
Registered Emissions Repair Technician (Repair Tech) Training Requirements
New Repair Techs:
Review the online MASS Module (four modules) and take the quiz after each
Pass the MASS Module exam
Attend the 28-hour OBD Diagnostics and Repair Training course and pass the proficiency exam
Registered Emissions Repair Technician Ongoing Training Requirements
Once you become a Registered Emissions Repair Technician, you will need to enroll in and attend one four-hour training module each year. These are offered quarterly for convenience.
Note: Current Repair Tech are permitted, but not required, to take the updated 28-hour OBD Diagnostics and Repair Training course
MASS Module Training
MASS Module training is a free online course for automotive repair professionals. The course will prepare you to become a Repair Tech and provide information about the Massachusetts Vehicle Check Program.
Applicants must review the online MASS Module (four modules), take the quiz after each, then pass the MASS Module exam.
Step 1
Review each of the four modules below. You should download or print this information so that you can refer to it while taking the MASS Module exam.
Once you have reviewed each training module, proceed to Step 2.
Step 2
Take a five-question practice quiz after reviewing each module to see if you have learned the information. This will help you prepare for the MASS Module exam in Step 3, but will not count towards your final exam score.
Quiz questions are randomly selected, so you may want to take each practice quiz multiple times before proceeding to Step 3.
Module 1: Vehicle Inspection Requirements
Module 2: Registered Emissions Repair Facility and Technician Requirements
Module 3: Motorist Assistance Resources
Module 4: Vehicle Emissions Inspection, Diagnostic and Repair Information
Step 3
Once you have completed Steps 1 and 2, you are ready to take the MASS Module exam. It is an "open book" test, meaning you may refer to the MASS Module content while taking it. The exam consists of 50 questions, and you must answer every one of them correctly.
Clicking the link below will open new browser windows. If a new window doesn’t open, please turn off any pop-up blockers and click the exam link again.
The Exam is currently unavailable, but will be available soon. We apologize for any inconvenience.
OBD Diagnostics and Repair Training
OBD Diagnostics and Repair Training is a free course designed for motor vehicle repair professionals who want to become Registered Emissions Repair Technicians.
This class is open to all technicians, including those studying to take the National Institute for Automotive Service Excellence (ASE) A8 Engine Performance or L1 Advanced Engine Performance Specialist test. You do not need to be an ASE-certified repair technician to take this course.
The training prepares technicians to diagnose and repair OBD-equipped vehicles. It is a 28-hour course, consisting of 20 hours of classroom lecture and 8 hours of hands-on training and examination.
To apply for enrollment in an OBD Diagnostics and Repair Training course, please take the following steps:
Step 1
Print and complete your application by clicking the button below:
Step 2
Scan and email your application to Opus: OBDDRTraining@MAVehicleCheck.com
or...
Mail your application to:
Massachusetts Vehicle Check Program
Opus Inspection Technologies, Inc.
787-A Hartford Turnpike
Shrewsbury, MA 01545
OBD Diagnostics and Repair Training Schedule:
Fall 2026 - Shrewsbury MAC
*Trainings are held at the Shrewsbury MAC 787A Hartford Turnpike, Shrewsbury, MA. 01545