Australian bus manufacturer AutoBus Australia has secured a development commitment from Isuzu Australia to jointly engineer a smaller purpose-built 4×4 passenger bus, adding a mid-size vehicle to the company’s growing range. 

The new vehicle, in the 23+ seat category, will sit below the 40+ passenger TRUBUS currently heading to its first public unveiling at the Australasia Bus & Coach Expo in July. It is designed for operators who need genuine off-road capability but whose passenger volumes or site constraints don’t suit the full-size TRUBUS platform. 

The Isuzu commitment gives AutoBus access to one of the most established medium-duty commercial vehicle platforms in the Australian market. Isuzu Trucks has led the Australian truck market for the past 37 consecutive years and operates the country’s largest dealer and service network in the segment. 

“This is a significant step for AutoBus,” said Boris Cherny. “The TRUBUS solves the problem of moving large crews and large groups across Australian off-road conditions. The Isuzu-based vehicle solves a different problem — operators who need the same purpose-built integrity at a smaller scale, with the service footprint to match.” 

The new vehicle has been under development in parallel with the TRUBUS at AutoBus’s Dandenong South facility. The commitment from Isuzu formalises a working relationship that has been in place through the platform engineering phase. 

Industry observers have noted that the addition of a 23+ seat vehicle opens up several markets that have historically been underserved by the Australian off-road bus segment. Regional and remote schools operating smaller student cohorts, tourism operators running boutique experiences, and emergency services units needing rapid-deployment passenger transport have all faced the same choice for years: oversized vehicles, or converted 4WD troop carriers with no real passenger infrastructure. 

“The 23+ seat category is where the conversion market has been strongest, and where the compromises have been most visible,” Frank Turrisi added. “Operators in that segment have been waiting for a purpose-built option. The Isuzu platform gives us the durability, the service network, and the cost position to bring one to the market.” 

Full specifications for the new vehicle have not been released publicly. AutoBus has confirmed it will be a front-engine 4×4 configuration, consistent with the engineering principles of the TRUBUS, and will carry dual warranty coverage across body (AutoBus) and chassis-drivetrain (Isuzu). 

The vehicle is expected to serve operators across AutoBus’s six core verticals: mining, renewable energy, military, schools, emergency services, and tourism. 

A public launch timeline for the Isuzu-based vehicle has not been confirmed but will likely occur in 2027. The company has indicated it will follow the TRUBUS launch, with further announcements scheduled for later in 2026. 

For AutoBus, the Isuzu relationship alongside the existing Scania relationship positions the company as the first Australian manufacturer with direct OEM relationships across both the heavy and medium commercial 4×4 bus segments. 

“Both partnerships reflect the same principle,” Boris Cherny concluded. “Australian operators deserve vehicles engineered for Australian conditions, backed by service networks that reach where their operations happen. The Scania and Isuzu chassis brands let us deliver that across two different vehicle sizes, for two different parts of the market.”