JPJ Number Plate are displayed at the front and rear of all private and commercial motorised vehicles in Malaysia, as required by law. The issuing of the JPJ Number Plate is regulated and administered by the Malaysian Road Transport Department (Malay: Jabatan Pengangkutan Jalan Malaysia) or JPJ.
The current standard for JPJ Number Plate were originally derivatives of pre-1932 number plate formats in the United Kingdom, first issued after the introduction of motorised vehicles in the 1900s during British rule. JPJ Number Plate are typically issued and are formatted similarly for any motorised vehicle that runs on rubber tyres, including most road-legal private, commercial and industrial vehicles, motorcycles, emergency vehicles, and selected heavy equipment (such as agricultural tractors, truck-mounted cranes and backhoe loaders). With the exception of those issued for taxis, vehicle dealers and diplomats, all vehicle number plates in Malaysia have white characters on black background for both front and rear plates, regardless of the vehicle type.
Standards for number plate designs have been defined by the Road Transport Department but are only practiced to an extent. Character size, layouts, and colour use are more strictly enforced for accurate identification and optimum visibility. However, the dimensions of the plates displaying the license number are more loosely enforced. While many vehicles display JPJ Number Plate in regulation dimensions or are housed in dealer plate frames with standardised dimensions, some JPJ Number Plate are outlined to precisely fit into vastly larger recessed spaces holding the rear license plates, or appear with reduced or custom dimensions where no proper alcoves exist, as commonly practiced on the front fenders and fairings of most motorcycles and the front of sports cars.
Early JPJ Number Plate were made of pressed metal, but were largely superseded by plastic plates since the 1970s, with characters either printed on or molded in plastic pieces.
The registration JPJ Number Plate system in Malaysia traces back to the introduction of motor vehicles in the early-1900s in colonial British Malaya, with the introduction by respectable state governments of a basic S #### format, where S prefix is the state identifier. Because the S #### format were not expected to be exhausted for a considerable time, state identifiers were allowed to be represented by one or two letters JPJ Number Plate.