A faulty seal on the Honda power unit’s MGU-K curtailed Jenson Button’s running after just 21 laps. McLaren said the fault “requires the full replacement of the power unit”.
However the team can draw some consolation from the improved pace the car showed while it was running, which was closer to that of their rivals than it was at Jerez two weeks ago.
“Such issues are all part of testing,” McLaren added, “and we will plan for a productive day of running with Fernando Alonso behind the wheel tomorrow.”
2015 F1 season
- How a secret Mercedes engine mode helped pressure Vettel into a race-ending puncture
- Over 100 driver penalties issued in record-breaking 2015
- Part-time racer? The facts of Hamilton’s ‘jet-set lifestyle’
- A unique atmosphere: Going to the Italian Grand Prix at Monza
- The Complete F1 Fanatic 2015 season review