2007 Lexus LS 460 - Code C1391

Looking for spare parts c1391 abnormal leak in accumulator

That is caused by a leak in the hydraulic brake actuator.
The brake actuator part number listed in this service bulletin costs about $1700.

The brake actuator listed in the parts catalog supersedes to P/N 44050-50170 and has a MSRP of $1166.