You must recertify in each test area every five years. If you let one of the required certifications expire, you lose your Master Technician status. You can regain it by taking the recertification test(s), even after you let a certification expire. Note that there is no time limit. Once you pass your original ASE test, you only need to take the recertification test, no matter how long it's been expired.
Test Series |
Tests needed for Master status |
Notes |
|---|---|---|
| Automobile | A1 through A8 | A9 Diesel Engines is not required. |
| Collision Repair | B2 through B5 | B6 Damage Analysis and Estimating is not required. |
| Engine Machinist | M1 through M3 | |
| Medium/Heavy Truck | T2 through T7 | T1 Gasoline Engines and T8 PMI are not required. |
| School Bus | S1 through S6 | S7 Air Conditioning Systems and Controls is not required. |
| Transit Bus | H1 or H2, plus H3 through H8 | Only one engine repair test, H1 CNG Engines or H2 Diesel Engines, is required. |
| Truck Equipment | E1 through E3 |
You may NOT earn this status if you are currently a Master Technician in one of the other three test series. This allows technicians who work on a variety of medium/heavy vehicle systems to earn Master status, as well as those who are transitioning from one test series to another.
Master Medium/Heavy Vehicle Technician |
||
|---|---|---|
Test Areas |
Pass one or more in each test area |
Notes |
| Diesel Engines | H2, S2, or T2 | H1 cannot be substituted |
| Drive Train | H3, S3, or T3 | H3 and S3 focus on automatic transmissions, T3 focuses on manual transmissions |
| Brakes | H4, S4, or T4 | H4 focuses on air brakes, S4 and T4 cover both hydraulic and air brakes |
| Suspension and Steering | H5, S5, or T5 | S5 includes light duty and heavy duty suspension systems |
| Electrical/Electronic Systems | H6, S6, or T6 | S6 includes special lighting and warning systems required for school buses |
| Heating, Ventilation, and A/C | H7, S7, or T7 | H7 and T7 include heating and engine cooling systems |