So over the last couple of weeks i have developed a leak in my brake lines. The leak has required me now to keep a bottle of brake fluid on hand to top of the reservoir. I believe i have tracked the leak top to be my right rear brake. I believe it is the line that is leaking. So my question is how should i further investigate to make sure nothing else could be the problem like leaking piston seals or whatever. And what would be the beat way in replacing the lines? Any help would be much appreciated.
Car- a4 b5 2.8lQm

 

If it is the hose , replaced the hose & bleed the brake fluid. If it the line , measure it & get the proper length of metric bubble flare steel line , custom fit it to the vehicle & bleed the brake fluid.

 

if its leaking from the line then i would suggest doing what M5S5 said... fix the first problem first and if it still persists then try and locate the other cause. but at least you know you fixed one of the problems..

 

Thanks for the help guys but i had some time to take a look at it today and what i found may be a bigger problem then i initially thought. Both the lines and hoses look fine other than being old, but my caliper appears to be leaking and dripping onto the lines which i interrupted as a problem with my lines. where the parking brake attaches to the caliper there is a nut that is leaking. In the picture i have attached i have removed the nut from the bolt to show where the leak is. So now my question is there a repair kit for this type of leak or am i going to have to replace the entire caliper. Thanks again for any help

 

Maybe just a bad caliper leaking?

 

the drake leak due to being the weakest link in the system, so I think you should replace the whole line.

good luck!