Jenson Button will use a new chassis for the remainder of the Korean Grand Prix weekend after McLaren discovered wear damage to the tub he had originally been down to drive following Friday practice.
As part of its standard post-practice work, the British team uncovered minor damage to the engine mounting struts on chassis 04 - which it believes was through regular use, rather than a specific incident.
With repair work unable to be completed at the track, however, McLaren elected to prepare a new chassis for him overnight.
With work on that finished early on Saturday morning, the team put the new chassis - number 01 - through scrutineering ahead of the final free practice session.
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