Mengshi

The M-Hero M817 is a plug-in hybrid and range extender full-size luxury SUV manufactured by the Dongfeng Motor Corporation under the M-Hero brand. It is the second vehicle in the M-Hero lineup and was launched in May 2025.

The M-Hero M817 is a plug-in hybrid full-size SUV designed for off-roading. The design language is similar to the M-Hero 917. It was first previewed at the 2025 Shanghai Auto Show.^[1] The production version was unveiled at Auto Shenzhen on May 31, 2025.

Design

The design language of the M817 is named Heroic Soul Aesthetics 2.0. It features a hood with raised sides and a lower center section, exterior surfaces inspired by battle armor, wide fenders and wheel arches, large bumpers with skid plates underneath, and a closed grille with an illuminated logo.

Features

The interior uses a 10.23-inch driver's display and a 15.6-inch central touchscreen. There are aluminum toggle switches below the touchscreen to control the drive modes and air conditioning, and on the top to control auxiliary gear.^[4]

The interior of the M817 uses Huawei's Harmony Space 5 cockpit operating system that controls the infotainment, instrument clusters, AI assistants, overall connectivity, and rear-seat entertainment. Huawei's ADS 4 system used on other Dongfeng cars such as the Voyah Taishan and Voyah Free+ is also present on the M817

Powertrain

It was initially expected to use a plug-in hybrid powertrain instead of an extended range powertrain used in the 917. Electric motors are present on both axles, giving the M817 all-wheel-drive. The motors work alongside a 1.5 liter turbocharged inline 4.^[5] At launch, it was confirmed to be an EREV.

A plug-in hybrid powertrain first became available with the Max+ trim that launched in September 2025. It is labeled as a plug-in hybrid, but is not specified if it is an EREV or not. The Max+ uses a 50.4 kWh CATL Freevoy sodium-ion and lithium-ion battery, gets an all electric range of 215 km (134 mi), and an all-electric range of 1,365 km (848 mi).^[6][7]

The power output ranges between 677 and 912 horsepower.

An update adding three additional trim levels, new colors, and new wheel design was announced in May 2026 with deliveries in July 2026. The update introduces additional powertrain options with a 2.0 liter turbo plug-in hybrid system a duo motor setup with the combined power output reaching 598kW and 1175N·m and a more powerful variant reaching 715kW and 1241N·m. 0-100km/h acceleration reaches 5.2 seconds and 4.26seconds respectively. batteries are 51.9kWh CATL LFP and 62.5kWh CATL NMC batteries with CLTC pure electric ranges of 215km and 301km respectively, while CLTC combined ranges reaches 1365km and 1450km respectively. WLTC fuel consumption is 8.36L/100km and 7.99L/100km and the 30%-80% SoC charging time is 16.2 minutes and 9.6 minutes with 800V architecture and 6C supercharging.