Is It Normal for Water to Enter the Trunk Groove of a BMW 5 Series?
3 Answers
Water entering the trunk groove of a BMW 5 Series is not normal and should be addressed promptly. Below is detailed information about the BMW 5 Series: 1. Overview: The domestically produced 5 Series is a premium sedan. The current generation of the 5 Series was introduced in 2004. The BMW 5 Series is one of the most outstanding series in automotive history, with its peak era beginning with the third-generation E34 (1988-1996). The current 5 Series is the third-generation product of the E34. 2. Other Specifications: Top speed is 250 km/h. Seat material is genuine leather. Acceleration time is 8.6 seconds (0-100 km/h). Drive type is front-engine, rear-wheel drive. Curb weight is 1740 kg. Number of valves is 24. Standard transmission is an 8-speed automatic with manual mode. Maximum power is 190 kW/rpm. Maximum torque is 400 Nm/rpm.
I remember once repairing a BMW 5 Series, water accumulation in the trunk groove is absolutely abnormal—it can corrode metal parts, cause electrical short circuits, and even lead to mold inside the car. Common causes include aging and cracking of the sealing strips, as rubber hardens and leaks after prolonged exposure to sunlight. Additionally, blocked drainage holes, such as those clogged by leaves or mud, can also cause water accumulation. If water has entered, first check the sealing components for cracks and clean the drainage pipes. I recommend promptly taking it to a 4S dealership for treatment; delaying repairs can increase costs and prevent electrical failures from affecting driving safety. During regular car washes, pay extra attention to whether the area stays dry. Routine maintenance can make your BMW more durable.
As someone who has driven a BMW for several years, my 5 Series trunk also had a similar issue where water occasionally seeped into the grooves. It turned out to be a broken seal on the rear taillight. This isn't normal because prolonged moisture can cause the chassis to rust, create odors, and even damage the trunk lock's circuitry. I tried cleaning it myself but didn't fully solve the problem—eventually, I had to visit a repair shop to replace the sealing components. Now, I've developed a habit of checking the grooves for moisture after rain and clearing the drainage holes to prevent clogs. If you discover this issue right after buying a used car, remember to check its accident history, as factory designs usually have good sealing.
