When I had mine done last year, the tech showed me how the lines were routed. The lines to each rear wheel run on top of the rear suspension assy., and the only way to replace them entirely, is to drop the assy. My dealership will not try to repair broken lines, they will only replace them with new (liability issues I suppose). And he showed me how the connectors between sections of line were the first things to rust, and he said it was very rare that they would separate without breaking. I work for the dealership, so I know they weren't giving me the run-around. The service manager told me that they have done over 100 X5's for the same problem, and apparently, the X5 is the only model with this problem. I wasn't happy about the cost, but I understand why they had to do all that labor.

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"If it ain't broke, fix it 'till it is"
'02 X5 3.0i, build date 02/2002, 135k, stock (for now)