McLaren Hit by Fuel System Issue on Final Day in Barcelona

On Thursday, January 29, the penultimate day of Formula 1’s first pre-season shakedown for 2026, a fuel system issue curtailed McLaren’s running as rivals Mercedes and Ferrari completed extensive programmes behind closed doors at the Circuit de Barcelona-Catalunya.

McLaren, who made their first appearance of the week on Wednesday with reigning world champion Lando Norris giving the MCL40 its debut, handed driving duties to Oscar Piastri on Thursday. However, the Australian’s afternoon was cut short when the car developed a fuel system problem.

As a result, McLaren logged just 48 laps on the day, more than 100 fewer than both Mercedes and Ferrari, limiting their opportunity to gather data on the all-new car under the 2026 technical regulations.

“Unfortunately, a few issues today,” Piastri said. “We had a fuel systems issue which cut our day a bit short, but I know the team is working really hard to get that fixed and get us back out for as many laps as we can tomorrow.”

Despite the setback, Piastri welcomed his first taste of the MCL40. “It was nice to be back out, especially in a new car. There are a lot of new challenges for everyone this year up and down the grid, so it’s good to start working through some of them.”

Elsewhere, Mercedes impressed by topping the timing screens, while Ferrari also enjoyed a productive day. Aston Martin, meanwhile, finally joined the test after a delayed start, debuting their Adrian Newey-designed AMR26 during the session.

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Written by

James Rees

A passionate motorsport journalist from Wales, with over 30 years of love for the sport. A dedicated father of three, working as a content manager, covering the fast-paced world of Formula 1, Formula 2, Formula 3, Formula E, and IndyCar.

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