Antifreeze for Toyota Aqua and Prius C
The Aqua, sold as the Prius C in the US, arrives in Georgia in numbers from Japanese auctions. It repeats the Prius logic in a smaller package: two cooling circuits, pink factory fluid and an inverter with its own reservoir. Here too the right product is Valvoline Zerex Asian Red.
Photographs come from the manufacturer's official materials.
Cooling system volume (litres) engine roughly four litres, plus a separate inverter circuit
A small system with the same requirements
The Aqua's engine circuit is smaller than the Prius's, but the chemical requirement is identical and the inverter circuit is just as sensitive to deposits.
Our advice is the same as for the Prius: take the red. One bottle of concentrate at 50/50 yields 7.5 litres, which covers both of the Aqua's circuits with margin to spare.