The fuel pressure regulator is located in the fuel rail, held in by a torx screw.
Release pressure from the system by cranking the car with the fuel pump fuse out, or byt depressing the relief valve on the end of the fuel rail.
Unbolt the regulator/housing assembly, unhook the vacuum hose, and remove the regulator/housing assembly.
Installation is reverse order.
If you need to replace the regulator that is located in the fuel pump, it is not serviceable. Luckily they rarely fail.
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