Similar thing happened to me on Friday; funny we both have a 01. You might want to read the following post. http://forums.tdiclub.com/showthread...ster+procedure
My brake booster made a pop sound when I jammed on the brakes at 30mpg. Now there is no brake assist requiring lots of leg force to stop the car. In the weeks leading up to this event, the booster was making a hissing sound only when the pedal was depressed about 80% down so under light braking it would never really hiss as far as my ears were concerned. Now itís causing a major vacuum leak as the vacuum at idle is 28 mG with the brake booster disconnected and the vacuum pump to brake booster line closed off at the booster end. With the booster connected however the idle vacuum is around 5 mG.
Questions I have is the following:
1. Where can one purchase a genuine part besides at the stealership?
2. The original defective brake booster part no. is 1J1614105M. Is there an updated part number or new and improved part?
3. Should the master cylinder also be replaced simultaneously for the sake of having both paired up as new?
4. Has anyone ever put in a used brake booster and what was your experience with longevity or reliability?
Little info about my car:
2001 Jetta TDI, 230K miles, 8th digit in VIN is M so I donít have ESP.
Thanks for sharing.