BMW Z4 soft top hydraulic motor corrosion due to poor design and drainage issues on BMW Z4

Some BMW Z4 owners report experiencing issues with the soft top hydraulic motor, primarily due to corrosion caused by poor drainage design. These problems can arise when rainwater accumulates in the motor compartment, especially if the drain holes become clogged with debris like leaves. Additionally, leaks in the top hinges can lead to hydraulic fluid leaking onto the garage floor, exacerbating the issue. As a result, some owners find that the soft top may not retract or operate properly, highlighting the need for regular maintenance to keep the drainage system clear and functional.