Changes are relatively modest, giving that "the original styling of the current IS has proved so popular," said Lexus in a statement on Monday.
Pricing will be announced closer to the launch date, a Lexus spokesman said.
The 2017 IS upgrades include a more aggressive-looking grille, new headlights and new wheel designs. The rear gets more pronounced LED taillights and new rectangular chrome exhaust tips.
Two new exterior colors are Deep Blue Mica and Graphite Black Glass Flake.
The performance-oriented 2017 IS F Sport's grille features a three-dimensional F-mesh pattern with jet-black metallic coating and functional brake ducts.
In the cabin, the infotainment screen on the 2017 IS has grown from 7 inches to 10.3 inches. The user interface is more intuitive, courtesy of new "Enter" buttons that have been added to the sides of the Remote Touch Interface.
New cupholders and a new interior color called Chateau, a light-gray shade, are designed to appeal to luxury shoppers.
The safety equipment in the 2017 IS has been upgraded with the Lexus Safety System +. The driver-assist features include a pre-collision system, lane-departure alert with steering assist, automatic high beam headlights and radar cruise control.
The powertrains are carryover.
The 2016 IS debuted with a three-model strategy and three engine alternatives.
The three models are the 2016 IS 200t, IS 300 AWD and IS 350. The IS 250 and IS 250 AWD were discontinued.
The new IS 200t features a 241-horsepower 2.0-liter turbocharged inline four-cylinder engine linked to an eight-speed automatic transmission.
Buyers can also select a 255-hp 3.5-liter V6 engine or a 306-hp 3.5-liter V6 engine.
The 2017 IS will not be offered as a hybrid.
Edmunds says: The spruced-up 2017 Lexus IS should remain a compelling choice for luxury shoppers.