Senna died in 1994, and Williams won their last championship in 1997. The evidence on exactly what caused the Senna crash is equivocal. There is a theory that

Senna died in 1994, and Williams won their last championship in 1997. The evidence on exactly what caused the Senna crash is equivocal. There is a theory that the crash was caused (or exacerbated) by failure of the steering column. However, there is no evidence that conclusively rules out the simplest explanation (driver error).