Red Bull have had to make a significant change to Max Verstappen's car ahead of qualifying after an engine issue prematurely ended his Friday practice.
Smoke was seen trailing from the back of the reigning champion's RB20 in FP2, which was later revealed to be a issue with the energy recovery system (ERS).
— Oracle Red Bull Racing (@redbullracing) June 8, 2024
Given Red Bull are still planning to look into the issue further, it appears that the engine which was replaced could still be used again this season if there are no serious issues.
However, if it cannot be salvaged, Verstappen will be one step closer to taking a penalty for using an extra power unit if he needs to take new engines later in the campaign (each driver is permitted four per season).
The ERS is responsible for harvesting and deploying energy through an electric motor, which can give drivers additional speed when looking to overtake or push harder.