Where is the drainage hole of BMW trunk?
3 Answers
BMW trunk drainage holes are generally located under the spare tire in the trunk and are plugged with rubber stoppers. Door panel drainage holes: There are usually 1-2 drainage holes at the bottom of the door panels. Most door panel drainage holes don't have hoses for guidance, rainwater flows directly through the rust-proof treated door panels and drains out. Trunk drainage holes: The trunk drainage holes are generally located under the spare tire in the trunk. The spare tire compartment is one of the lowest points of the vehicle body. When wading depth is too high or water seeps through headlight gaps, water will flow to this location through the internal body structure. Engine compartment drainage holes: The engine compartment drainage holes are located at the rear of the engine compartment, along the lower edge of the windshield, near the air conditioning intake.
On BMW vehicles, the trunk drainage holes are usually quite hidden, typically located in the bottom corners or rear areas of the trunk. Specifically, most BMW models have these drainage holes around the spare tire well under the trunk floor panel or in the low points inside the rear bumper, where small holes are designed to direct rainwater or car wash water outside, preventing water accumulation that could corrode the chassis or cause odors. I often help friends inspect their BMWs and find that clogged drainage holes can easily lead to a damp trunk or even mold, especially after rain or car washes if not cleaned promptly. It’s recommended to regularly clean these small holes with a soft brush or compressed air to keep them clear. Additionally, the exact location may vary slightly between models like the 5 Series or X5, but the principle remains the same: they are placed at the lowest points of the vehicle to ensure water drains out. Remember to lay down a mat during maintenance to avoid getting dirty water on yourself. After driving for so long, I’ve learned that paying attention to these small details can prevent bigger issues.
Finding the drainage holes in a BMW's trunk is actually quite simple. Open the trunk, crouch down, and look along the edges of the floor or the gaps at the rear—you'll usually spot some small holes, typically located around the spare tire or inside the wheel arches. I only discovered them last year when I changed cars because a friend's trunk had standing water, leaving a musty smell. These holes are designed to prevent water accumulation by allowing it to drain to the ground. If you frequently wash your car or encounter heavy rain, check if the holes are clogged with leaves or debris. A piece of wire or a long stick can be used to gently clear any blockages. Neglecting this can lead to long-term water buildup, damaging items in the trunk and potentially causing electrical issues. BMWs have multiple drainage points, but the trunk's is the most prone to problems.
