The Sienta is sold in Japan, Hong Kong, Singapore, Indonesia, Taiwan, Laos, and Thailand.

Powered by a 1.5 L VVT-i petrol engine capable of 82 kW (110 hp; 111 PS) at 6,000 rpm, the Sienta comes equipped with CVT.

There is also a hybrid variant, which returns 27.2 km/L (77 mpg‑imp; 64 mpg‑US) under the Japanese JC08 cycle test, making it eligible for eco-car subsidies and tax incentives.

To meet the standard geological conditions in Indonesia, it is 20 mm (1 in) higher than the Japanese market Sienta.

The shift knob location also moved to the floor to accommodate the 6-speed manual transmission, as well as the grip handbrake.

Some visual differences as compared to the units sold in Japan were that it does not feature the “Sienta” badging embossed on the tailgate handle, instead, the model badge name is on the tailgate itself, and an additional rear foglamp is featured center mounted on the rear bumper edge.

[14] The Sienta is available both from Borneo Motors (Toyota's authorised dealer in Singapore) and parallel import distributors since 2016.

The top-of-the-line adds dual beam LED headlamps, LED tail lamps, 6 airbags, a head-up unit, dual powered sliding rear doors, colour-screen trip meter, reversing camera, leather-wrapped steering wheel, and transmission knob, and a double layer of front windshield as the top of the standard features.

The Sienta is available in Thailand in two trim levels, 1.5 G and 1.5 V. The top-of-the-line V trim adds dual beam LED lamps, push start and stop button, smart entry, Optitron trip meter, and automatic front AC on top of the standard features.

[18] The facelifted Southeast Asian market Sienta was launched in Thailand on August 6, 2019[19] and in Indonesia on September 2, 2019.

Built on the GA-B platform shared with the XP210 series Yaris, it is offered in X, G and Z grade levels.