Toyota has expanded the work of its TNGA (Toyota New Global Architecture) programme to small cars with a new GA-B platform, likely to underpin the new Yaris due in 2020.

Expected to be the basis for the next Yaris, the GA-B platform can enable different vehicle wheelbase lengths, heights and track widths

The modular structure offers a range of platforms to accommodate various Toyota and Lexus vehicle sizes and configurations, bringing improved ride, handling and design compared to before. It debuted with the current-generation Prius in 2015 in the form of the GA-C platform for compact cars. This has since been used for the C-HR crossover and the new Corolla.

Meanwhile the GA-K platform has been used to bring the concept to larger saloons and SUVs, including the new Camry and RAV4.

Extending the focus to small cars is expected to bring design and driving performance improvements, helped by a highly rigid underbody that uses advanced techniques to strengthen joints in the structure, while at the same time focusing on weight-saving and cost control.

The MacPherson strut front suspension features low-friction dampers and can accommodate different spring types. The platform allows for either torsion beam or multi-link rear suspension systems to be used, according to vehicle type and character.

The GA-B platform also brings a lower centre of gravity and a more engaging driving position. It also combines a long wheelbase architecture and smart packaging to maximise interior space, even with compact exterior dimensions.

The modular approach also means the platform is suitable for use with different vehicle wheelbase lengths, heights and track widths, opening it up to new models of different sizes and body types.