It is not only how they are maintained, but also how they are driven.
BMW's are sport enthusiast vehicles. They are probably used and abused and higher levels than typical Toyotas and Lexus. You won't see many Toyotas and Lexus in race tracks, however they are usually populated by all type of BMWs, specially M performance and full M models.
So I expect that under normal usage, BMWs are even more reliable that the ranking shows.
BMW's are sport enthusiast vehicles. They are probably used and abused and higher levels than typical Toyotas and Lexus. You won't see many Toyotas and Lexus in race tracks, however they are usually populated by all type of BMWs, specially M performance and full M models.
So I expect that under normal usage, BMWs are even more reliable that the ranking shows.