DIY Brake Booster - Not BB Cable

[czarj66]

Greetings Everyone,

 

I have done much research on the internet but can't seem to find a DIY for the brake booster  on a cayenne turbo 2004. I find many, many postings on replacing the cable and sensor. Mine have been replaced, reset and now I have the brake booster fault code on the control panel again. Mechanic diagnosed and said it was the brake booster. Can anyone direct me to this information?

[lewisweller]

4 hours ago, czarj66 said:

Greetings Everyone,

 

I have done much research on the internet but can't seem to find a DIY for the brake booster  on a cayenne turbo 2004. I find many, many postings on replacing the cable and sensor. Mine have been replaced, reset and now I have the brake booster fault code on the control panel again. Mechanic diagnosed and said it was the brake booster. Can anyone direct me to this information?

I would suggest they misdiagnosed the fault. What is the fault code exactly and is it the same code as originally shown before any repairs were done? 

 

What part(s) was changed? Often brake booster code ls relate to split vac pipes around the expansion tank area which run from the vac pump up down and around the expansion tank and along the fire wall to the brake servo. 

 

Do the test. Engine idle then switch off. Pump brake pedal a few times it should go hard after 3-6 pumps. Hold pedal down deep then restart engine and the pedal should depress further as the vacuum increases on the brake booster. 

 

Pull the pipe off the vac pump and blow down it hard if any air passes you got a leak. 

 

There are post on here for split pipe fixes. 

[czarj66]

Thanks for the reply Lewis Weller, 

 

You were right, it wasn't the brake booster itself. It turned out to be the vacuum pump to the brake booster that was fried.

 

I'm glad I posted this and you replied. Had I not had another Tech check for other faults, I would have installed the wrong part.

 

You guy rock!!!

[lewisweller]

10 minutes ago, czarj66 said:

Thanks for the reply Lewis Weller, 

 

You were right, it wasn't the brake booster itself. It turned out to be the vacuum pump to the brake booster that was fried.

 

I'm glad I posted this and you replied. Had I not had another Tech check for other faults, I would have installed the wrong part.

 

You guy rock!!!

Pleasure to help. Thanks for updating and letting the forum know the fix, so many post go dead and never get closed, very frustrating to read a long thread and get to the end and no answer just open questions. 

[czarj66]

I agree. I've been using this boards for years. They help out a lot, but it is definitely a collective effort to share this information.