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 R312 front, chassis and dash (with steering column), and choices of bodywork.
ACTION purchased 42 PR100.3 buses, all with Austral Denning bodies which incorporated the R312 front. Two of these vehicles were originally powered by natural gas, but they were converted to operate on diesel in 2007; these two buses have since been withdrawn from service.
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.