Guys,
I need to replace the pressure regulating valve on my 1999 E46. Has anyone done this? And if so, can I get a step by step on how to do it? Or is this one of those repairs best left to a good shop? :help :help

Thanks for the help in advance guys,
Bob

Which one?
There are a number of "pressure" regulators.
Fuel, Air conditioning, etc.
andrew