I'm sorry to hear about your
BMW 5 series passenger headlight issue. It can be frustrating when water gets inside and causes the light to become inoperable. Here are a few possible solutions you can try:
1. Inspect the headlight housing: Carefully examine the headlight housing for any cracks, gaps, or damaged seals that may be allowing water to seep in. If you find any, you may need to replace the housing to ensure a proper seal.
2. Check the wiring connections: Make sure all the wiring connections for the headlight are secure and free from any corrosion. Loose or damaged connections can allow water to enter the headlight assembly.
3. Replace the rubber gasket or seal: If you notice that the rubber gasket or seal around the headlight assembly is deteriorated or damaged, it may need to be replaced. This seal is crucial for keeping water out, so a worn-out gasket can be the source of the problem.
4. Consider using headlight sealant: There are specific sealants available that can help prevent water from entering the headlight assembly. You can try applying a headlight sealant around the edges of the housing to create an additional barrier against water intrusion.
5. Seek professional help: If you have tried all the above steps and are still experiencing water leakage, it may be best to consult a professional mechanic or an automotive specialist. They will have the knowledge and expertise to diagnose the exact cause of the problem and provide a suitable solution.
Remember, it's important to address this issue promptly to prevent further damage to your headlight and ensure your safety on the road.