Max Verstappen and Sergio Perez will start the Hungarian Grand Prix with new power units while Pierre Gasly has been hit with a pitlane start.
Red Bull duo Verstappen and Perez endured a tricky qualifying, with the reigning F1 champion encountering a PU problem in Q3 that means he will start 10th, while his team-mate failed to make it out of Q2.
The team has taken the decision to introduce a new system into the pool, with both Verstappen and Perez receiving the third and final internal combustion engine, MGU-H, MGU-K and turbocharger.
A further change of any of those components at a race after the summer break will lead to grid penalties.
As for AlphaTauri driver Gasly, his car has also taken on a new engine, MGU-H, MGU-K, turbocharger, energy store and control electronics unit.
The FIA has confirmed that as all the components were changed without the approval of the FIA technical delegate, Gasly, who qualified a miserable 19th, will now start the race from the pitlane.