McLaren sidelined on day one in Barcelona with MGU-K problem

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McLaren-Honda has confirmed that it will not be taking any further part in today’s F1 test session in Barcelona after a problem with the power unit on the MP4-30.

The British team was hoping to enjoy a more successful test in Barcelona after the new Honda-powered car suffered a difficult baptism in Jerez, where teething problems meant it could complete just 79 laps across four days.

Jenson Button had been testing the car on the first morning in Barcelona, completing 21 laps with a fastest time of 1:28.182. However, he was sidelined before the lunch break, with the team confirming that an issue with the car meant that its day was over.

“We’ve had to stop running today due to a faulty seal on the MGU-K which caused an issue that requires full replacement of the power-unit,” a tweet from the team read.

It went on to confirm that its running order for the test had been changed as a result, with Fernando Alonso getting in the car on Friday in place of Button.

It is therefore likely that Button will take one of Alonso’s allocated days (Saturday and Sunday) to make up for his lost running on Friday.