Where are the drainage holes for the Peugeot 408 sunroof?
2 Answers
The drainage outlets for the car sunroof are located inside the vehicle's A-pillars and C-pillars, with a round rubber plug. The rear ones are on both sides of the rear longitudinal beams, one on each side, similar to the front ones. How the sunroof drainage holes work: Sunroofs vary in type, so the drainage holes are generally positioned at the four corners of the sunroof, designed to be concealed. Modern vehicles are equipped with water-blocking channels, allowing rainwater to flow along the drainage channels through the A-pillars or C-pillars and eventually exit from the underside of the car. If both left and right drainage holes become completely blocked, accumulated water cannot drain properly and may flow along the roof toward the sunroof motor inside the vehicle. The importance of sunroof drainage holes: If there is an issue with sunroof drainage, it can cause the sunroof motor to short-circuit or burn out, which is a common cause of electric sunroof failure. Detached or damaged drainage hoses can also lead to water leakage inside the car.
I've worked on several Peugeot 408 models, and the sunroof drain holes are usually located on the inner side of the tracks at all four corners of the sunroof. Each corner has a small hole connected to a plastic tube that leads to the underside of the car. Generally, you can spot them by opening the sunroof and carefully inspecting the track area. The front drain tubes run down to the lower part of the A-pillar near the wheel arch, while the rear ones extend to the C-pillar. When cleaning, avoid poking with hard objects as it may damage the tubes—it's better to use compressed air to gently blow out any clogged dust. Neglecting a blockage can cause rainwater to leak into the cabin, soaking the seats and carpets, which can be expensive and troublesome to fix. For regular maintenance, remember to check periodically and clear the drains before the rainy season.
