
The Swiss will drive the #94 Peugeot 9X8 Le Mans Hypercar in the Bahrain 8 Hours on 12 November alongside Loic Duval and Gustavo Menezes.
Muller takes the place of James Rossiter, who in his capacity as reserve driver filled the seat vacated by Kevin Magnussen on his return to Formula 1 with Haas in March.