Lewis Hamilton received a new-spec MGU-K element to kick off the British Grand Prix weekend, with Mercedes insisting the change is a precautionary measure.
Mercedes was initially planning to change the component at next weekend's 70th Anniversary Grand Prix at Silverstone, but decided to bring forward the change to ensure a better level of reliability and after "anomalies" were observed in Hungary.
All other Mercedes-powered drivers - including Hamilton's teammate Valtteri Bottas - will receive the updated Motor Generator Unit - Kinetic at next week's round at Silverstone.
"It's a precautionary change one race earlier than planned due to some data anomalies after Hungary," a Mercedes representative told Motorsport.com.
"It's an updated spec of MGU-K for reliability reasons, which will be on all cars from next weekend."
As a reminder, drivers are allowed a total of three MGU-K elements for the entire season.
Gallery: The beautiful wives and girlfriends of F1 drivers
Keep up to date with all the F1 news via Facebook and Twitter
Former Ferrari engineer Rob Smedley has delivered a bleak assessment of the Italian outfit's Miami…
With Mercedes suddenly finding itself at the sharp end of a championship fight again, questions…
Few figures in Formula 1 deliver uncomfortable opinions with quite as little hesitation as Ralf…
Reigning F1 world champion Lando Norris will be among the most intrigued observers this weekend…
It all started on May 13, 1950 at Silverstone Circuit, where Alfa Romeo's Giuseppe Farina…
As Formula 1’s controversial new era continues to divide opinion, Nico Hulkenberg has delivered the…