| Chapter 69 | Ignition Systems |
| Chapter 70 | Gasoline Fuel Systems |
| Chapter 71 | Induction and Exhaust Systems |
| Chapter 72 | Engine Management and On-Board Diagnostics Systems |
| Chapter 73 | Emissions Control Systems |
| Chapter 74 | Electric, Hybrid, and Fuel Cell Electric Vehicles |
| Chapter 75 | Alternative Fuel Systems |