I recently saw that the B48 engined Toyota Supra was part of a recall, 2019-2022, after some engine fires starting from water ingress into the starter motor. I'm not sure if this is exactly the same engine as Plus Four?

https://www.caranddriver.com/news/a68076611/toyota-supra-bmw-x3-3-series-engine-fire-risk-recall


DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4