The season introduced the most significant technical overhaul in the championship's history. The Spark Gen3 car — the smallest and lightest Formula E car to that point — replaced the Gen2 Spark SRT05e. Power output climbed from 250 kW to 600 kW thanks to a second powertrain added to the front axle, increasing regenerative capability from 25% to 40%. As a result, the Gen3 car had no hydraulic rear brakes. Maximum speeds rose above 320 km/h. The tyre supply contract passed from Michelin to Hankook. Race format reverted to a fixed number of laps rather than the timed format used in the Gen2 era. Fanboost — the public-vote power mechanism — was discontinued.
Mercedes-EQ did not return to defend the title, their entry and assets having been purchased by McLaren. The new McLaren team used Nissan powertrains. Maserati entered the championship, becoming the first Italian manufacturer in Formula E and the first Maserati constructor in formula racing since the 1950s; they partnered with ROKiT Venturi Racing. Nissan acquired full ownership of the e.dams operation, rebranding it as the Nissan Formula E Team. ABT Sportsline returned with Extreme E partner Cupra under the name ABT CUPRA Formula E Team using Mahindra powertrains. DS ended their partnership with Techeetah after four seasons and formed a new alliance with Penske; Techeetah sat out the season.
Nyck de Vries departed Formula E for Formula One with Scuderia AlphaTauri. António Félix da Costa joined TAG Heuer Porsche from DS Techeetah, while André Lotterer moved to Andretti. Sébastien Buemi switched from Nissan to Envision Racing after eight seasons with the former team.
Porsche-powered cars — particularly Pascal Wehrlein — dominated the early rounds. Wehrlein led the championship for much of the first half of the year, building a 24-point advantage by São Paulo. Nick Cassidy then emerged as the principal challenger, winning in Monaco and Berlin to overhaul Wehrlein and take the points lead.
The Jakarta double-header proved pivotal. Wehrlein recovered his championship lead with a win in the first race. Maserati took their first Formula E pole position with Maximilian Günther in the second race; Günther's victory was historically significant as Maserati's first single-seater win since Juan Manuel Fangio at the Nürburgring in 1957.
At Portland, Formula E's first visit to a permanent circuit in the United States, Cassidy won to extend his lead to 18 points. The Rome double-header brought chaos: a serious multi-car incident in the first race saw Sam Bird's car hit by Sébastien Buemi and Edoardo Mortara. Dennis won the second Rome race, tightening the title battle. In the first London ePrix, Cassidy effectively lost his chance at the title after miscommunication with his Envision teammate Buemi led to a collision. Dennis secured the championship in the second London race, becoming the first British Formula E World Champion.
Envision Racing's late surge in the teams' standings secured their first Teams' Championship on the final day of racing. Sébastien Buemi also set a new record for the most career pole positions in Formula E history at the Berlin round, surpassing the previous mark.
New venues included Hyderabad, India — the first FIA World Championship event in the country since the 2013 Indian Grand Prix — São Paulo, and Cape Town. The United States round relocated from New York's Brooklyn circuit to Portland International Raceway. The Jakarta ePrix became a double-header for the first time.