[5] The Toyota GR Yaris Rally1 is an advanced iteration of the high-performance rally car, developed in compliance with the FIA Rally1 technical regulations introduced in 2022.

The chassis of the GR Yaris Rally1 employs a spaceframe design, ensuring high safety standards for both the driver and co-driver.

The fundamental construction of the car, adhering to Rally1 regulations, includes a five-speed gearbox with a mechanical shift and a short suspension travel, consistent with specifications until 2024.

The GR YARIS Rally1 features a power unit broadly consistent with the 2024 model, utilizing a 1.6-liter inline 4-cylinder direct-injection turbocharged engine.

This absence of a hybrid boost has necessitated adjustments to the engine's performance characteristics, resulting in changes to the exhaust system and camshafts for the 2025 model year.