• only commercial vehicles are subject to periodic inspection

• new vehicles (after '95) are inspected annually for the first 2 years and thereafter once every 6 months

• older vehicles (before '95) are inspected once every 6 months

• diesel vehicles are checked for black smoke levels (by free acceleration method)

• petrol vehicles are checked for CO and HC concentrations (at idle)

In 1994 the Government's periodical inspection program was privatized. PUSPAKOM, a private company, was awarded the right to establish inspection centers.

PUSPAKOM has setup 31 computerized inspection centers in Malaysia.

AWASI: The Area Watch and Sanction Inspection (AWASI) Programme was first introduced in Kuala Lumpur. A total of 20,137 vehicles were visually inspected, out of which 982 were summoned and 531 were issued with prohibition orders.