Vehicle Inspection

Comprehensive Vehicle Classification & Compliance Evaluation

A vehicle (VEHICLE), specifically referring to motor road vehicles and their trailers, is defined as either a self-propelled vehicle with at least four wheels and a design speed exceeding 25 km/h, or a non-self-propelled wheeled vehicle designed to be towed by a motor vehicle. According to the Iranian National Standard No. 6924:2015, these vehicles are categorized into groups M, N, and O.

Vehicle Classification for Inspection

Based on National Standards of Iran (ISIRI)

Group M (Passenger Vehicles)

Primarily designed and constructed for the transport of passengers and their luggage.

M M1

Has a maximum of 8 seating positions in addition to the driver’s seat (may be limited to one seat position)
Must not have standing space

M M2

Has more than 8 seats in addition to the driver’s seat
Maximum mass of 5 tons or less

M M3

Has more than 8 seats in addition to the driver’s seat
Mass greater than 5 tons (includes space for standing passengers)

Group N (Goods Vehicles)

Primarily designed and constructed for the transport of goods.

N N1

With a maximum mass of 3.5 tons

N N2

With a mass of more than 3.5 tons and up to 12 tons

N N3

With a mass of more than 12 tons

Group O (Trailers)

Trailer designed and constructed for transporting goods, people, or for accommodation.

O O1

With a maximum mass of 0.75 tons

O O2

With a mass of more than 0.75 tons and up to 3.5 tons

O O3

With a mass of more than 3.5 tons and up to 10 tons

O O4

With a mass of more than 10 tons