Jenson Button managed just 22 laps of the Bahrain International Circuit before a series of problems halted his progress.
An engine failure on Button’s car – which McLaren, like fellow Mercedes users Williams, described as a “high-mileage unit” – kept him from doing much running in the afternoon.
The team were unable to conduct a test of a new front wing for the Australian Grand Prix due to a further problem with the car’s electronics which they have not diagnosed yet.
McLaren logged over 4,100 kilometres of testing in Jerez and Bahrain, though Mercedes, Williams and Ferrari all completed more.
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Image © McLaren/Hoch Zwei