BMW Z4 convertible top motor repeatedly failing due to water intrusion on BMW Z4

Some BMW Z4 owners report experiencing issues with the convertible top motor due to water intrusion, which often leads to repeated failures. Many have noted that water can become trapped inside the plastic housing of the main motor, causing it to malfunction. Additionally, blocked drain holes can result in water build-up, worsening the situation. Accessing the convertible top motor assembly can be challenging, prompting some owners to find creative solutions, such as feeling for the left drain hose from the trunk. DIY enthusiasts have successfully replaced the motor by following detailed guides, highlighting the commonality of this issue. While newer models, like the 2009 BMW Z4, have seen improvements to address engine cooling and oil leaks, the risk of water damage remains a concern for many owners.