I'm having a problem with the brake on my 1995 Cabrio. The shop tells me I need a new brake hydraulic module. Apparently mine has become contaminated with black oily fluid Ive tried a couple from salvage yards, but these have the same issue. All appear to work fair, then lose pedal pressure after a couple of days. New part costs $1300 I'm looking for a rebuilt brake hydraulic control module. I believe the part number is 1H1698117P.

Have others experienced this? Are there other alternatives than the new part?