
The water leakage issue with the Aion Y has been resolved. The causes of car water leakage are as follows: Aging of Seals: With prolonged use of the car, the waterproof seals at the door and trunk openings may age or even crack, allowing rainwater to seep into the car through these gaps, leading to water leakage. Blocked Drainage Outlets: Window leakage is relatively common, where heavy rain outside leads to minor leaks inside. The main cause of window leakage is the blockage of the sunroof drainage channel's outlets by dust and debris, causing excessive accumulation and leakage. It's advisable to inspect and clean these areas yourself.

Last time I got my car repaired, I overheard some Aion Y owners talking about water leakage issues. Some had water entering through the aging trunk seal, leaving visible water marks on rainy days; others had clogged sunroof drainage tubes, with leaves piled up in the drainage channel. The latest batch of vehicles seems to have improved the drainage design, but owners of older models should regularly clean the drainage holes on both sides of the sunroof themselves—just use a thin wire to clear them. Additionally, when washing the car, pay extra attention to rinsing the roof drainage channels, as sand and debris clogging there can also cause water seepage. If you notice any leakage, address it promptly to prevent mold growth in the carpet, which can be a hassle. It's recommended to visit a 4S shop to have them use an air gun to clear the pipes and check if the sealing strips have deformed.

A friend's Aion Y had water accumulation in the trunk after heavy rain last year, and it turned out the waterproof gasket at the taillight assembly mounting point wasn't properly compressed. This assembly issue occasionally occurs in batch vehicles, and the new production line has added a secondary inspection station. For self-inspection, you can lift the trunk floor mat and use a flashlight to check the connection points at both wheel arch liners—water stains indicate poor sealing. As a temporary fix, you can apply automotive sealant around the taillight frame, but it's best to return to the dealership for reinstallation. By the way, here's a detail often overlooked: water ingress through the rear camera wiring harness hole can also cause trunk water accumulation. After repairs, remember to air out the carpet for a couple of days to prevent musty AC odors.

In the workshop, I've seen several Aion Y models with water leakage issues, mostly caused by the sunroof. The drainage holes in the frame are designed inside the A-pillars and are prone to clogging with tree sap over time. Here's a clever trick: lower the sunroof, pour half a bottle of water into the drainage channel, and observe how quickly the water drains near the wheel arch. If the water doesn't flow smoothly, you'll need to remove the A-pillar interior trim to clear the blockage, which can be done at a repair shop for around 200 yuan. Recently, a new issue has been noticed: excessive water spraying during window tinting can corrode the electrical connectors in the headliner, triggering false water leakage alarms. It's recommended not to wash the car immediately after tinting; let it dry for three days first.

My cousin's Aion Y was leaking water, and after a thorough inspection, it turned out that the air conditioning drain pipe was flattened by the floor mat. The car's drain pipe is designed under the front passenger floor, and the installation of a full-coverage floor mat pinched the hose, causing condensed water to backflow. The carpet was so wet that water could be wrung out. To fix it, just lift the carpet and straighten the drain pipe. A reminder to everyone: when installing accessories, avoid the original car pipeline locations. Also, after rain, remember to check the bottom of the door storage compartment. Early batches occasionally had water seepage there due to window seal issues. The manufacturer's solution was to increase the seal thickness by 1mm. Older car owners can apply for a free replacement at the 4S store.

During , the technician mentioned the three most common leakage points for the Aion Y: the sunroof drain pipe joint has a 15% detachment rate, requiring the entire roof lining to be removed for repair; uneven application of waterproof adhesive at the trunk hinge area accounts for 10%; the most troublesome issue is bubbles in the windshield adhesive, which requires professional equipment to detect. A practical tip: stick toilet paper along the roof seams and spray water to see which section gets wet first. If a new car leaks, simply use the warranty—manufacturers now extend the warranty for leakage-related parts to 5 years. A reminder for northern owners: in winter, remember to remove ice chunks from the drainage holes, as freezing can also cause water to seep inside.


