During the first round of 2018–19 season Tincknell had a major accident at the Six Hours of Spa race after a front end mechanical failure caused a head on impact with the tyre barrier at the famous Eau Rouge corner. Despite a 29G impact he was unharmed. At Le Mans, he and Priaulx were joined by Indy 500 winner Tony Kanaan. The trio finished 4th but a post race penalty demoted them to 9th. Podiums at Fuji and Sebring were followed with 4th at the 2019 24 Hours of Le Mans, this time partnered by Jonathan Bomarito.