Exhaust

Reasons for rejection

Mandatory equipment

1. A vehicle is not fitted with an exhaust system that includes a means of sound reduction (Note 1).

Condition

2. An exhaust system is not securely mounted.

3. The exhaust system is so constructed or modified that its operation or effectiveness can be readily interfered with, eg the driver is able to interfere with the exhaust system by operating a manual switch.

4. The exhaust system is so constructed that emitted heat or fumes:

• are not directed away from, and prevented from entering, the vehicle’s passenger compartment (Note 2), or
• are likely to harm vehicle occupants.

Performance

5. There is a leak of exhaust fumes from the exhaust system.

6. The exhaust noise output from a heavy vehicle is noticeably and significantly louder than it would have been when the vehicle was manufactured with its original exhaust system

Note 2

Exhaust systems that direct exhaust fumes away from the perimeter of the vehicle’s passenger compartment will comply with this requirement, and an OE fitment (or direct OE replacement) where the exhaust system terminates directly below the vehicle’s floorpan is also permissible.