The Renault PR100.3 was a city bus marketed in Australia, based on the Renault R312. The bus, like the PR100.2, was a package with a standard R 312 front, chassis and dash (with steering column), and choices of bodywork.
ACTION purchased 42 PR100.3 buses, all with Austral Denning bodies. These buses look more like their European counterparts than the Transperth version. Forty of the buses are diesel powered (PR100.3), while two are powered by natural gas, designated by ACTION as the PR100.3NGV. Seven of the buses are also wheelchair accessible, and are classed as the PR100.3a. Although the bus is marketed as a Renault, six of the wheelchair-accessible buses (all of the final order) were badged as Macks. This included an oval bulldog logo in place of the Renault diamond on the front. Bus are numbered as follows:
Number 113 is the only official Renault badged PR100.3a. The reason for this is that the bus was originally a normal PR100.3. The bus was first placed in service on trial with Brisbane Transport. It was converted to a wheelchair-accessible bus after its service with Brisbane Transport. It never operated in Canberra service as a normal PR100.3.
Both NGV buses and all .3a buses have been modified: the NGV buses have been converted to run on diesel fuel, and the .3as are no longer wheelchair accessible (but kept the kneeling suspension).
Busways inherited 25 PR100.3s when it purchased King Brothers from its receivers in 2004. Twenty-four were bodied by Custom Coaches and one by Northcoast Bus & Coach. They are mainly on the Mid North Coast of New South Wales, but a few have made their way to Blacktown, in Western Sydney.
Transperth purchased one Volgren bodied PR100.3. It is operated by Path Transit. This bus differs in many ways from the ACTION fleet in the shape and design of the body and interior (looking less like the European R312), and also has an evaporative cooler. The only similar features are the dash, chassis, steering column and the R312 front.
This bus is numbered 1133 in the Transperth fleet and was offered for sale in 1993, but there was no buyer. The bus is technically still in service today, but, is normally used only when it is critically required as poor performance still haunts it. It is painted in Transperth corporate colours—green and white—and is garaged at Malaga Depot. It was converted to CNG fuel by Transcom.