No Brakes.....uh ohh... Brake Booster?

[Lexicon740iL]

Hi Guys,

So I noticed the past couple of days when I start the X the brake peddle was pushing back at me an abnormal amount during self test at startup. I checked the fluid level and topped it off as it was a bit low. Then yesterday I left work at lunch and could barley stop when backing out of my parking spot.

There was no pressure in the peddle and I had to push all the way down to the floor for the brakes to barely engage and stop me.

No lights were on in the cluster so I knew it was not ABS or DSC related. No fluid loss so I know it's not a leak or broken line.

I pulled it around the corner to a garage a half a block away where I know the service manager (Former BMW Dealership Tech) and I left the X with him for diagnosis.

He called me back last night and said the hydraulic system is fine with no leaks and it's the brake booster. He said there is good vacuum and no oil infiltration into the system as sometimes occurs.

He said he was going to call this morning with a quote once he confirms parts availability.

Can anyone link me to a R&R for this part? I usually do stuff myself but it was convenient to drop it off there and not tow it home.
But I want to be informed on the level of work involved in replacement of the unit so I can see if the labor quote is reasonable or If I should just do it myself and cash them out for diagnosis.

The main reason I am considering doing it myself is they have a strict policy of no customer supplied parts. Well with my CCA discount I can get 20% off that booster from the same local dealership they are probably going to source the part from so I'm already overpaying from the get go just on the part needed.

Thanks for you input guys

-Lex