What causes the rust and bulging on the Tiggo 3 sunroof?

[VonLouis]

Tiggo 3 sunroof rust and bulging may be due to material issues, or related to water exposure or weather conditions. Material issues: The basic material of a car sunroof is aluminum alloy, which theoretically should not rust. However, if the raw materials of the components have poor resistance to deformation and corrosion, bulging and rust may occur over time. If such quality issues arise during the warranty period, the 4S store can be responsible for repairs. Water exposure: Cars are mostly assembled from metal and plastic materials, which have certain waterproof properties. However, prolonged water immersion can also cause material corrosion and deterioration. In such cases, the car manufacturer is not responsible for quality issues. Humid weather: Humid weather increases the number of water molecules in the air, which can accelerate metal corrosion, leading to bulging and rust. It is advisable to protect the car in humid weather, such as by using a dust cover, to minimize moisture adhesion.

[Carolyn]

I've been driving for over a decade, including SUVs like the Tiggo 3, and have seen quite a few cases of sunroof bulging and rusting. The main cause is aging or damaged sealant, which allows rainwater to seep in and corrode the metal frame, eventually leading to bubbling and rust. Some batches of the Tiggo 3 may have less durable sealing systems, and prolonged exposure to vibrations and UV rays can cause the seals to deform more quickly. I recommend paying regular attention to sunroof maintenance, such as cleaning the drainage holes and seal grooves periodically to prevent blockages from leaves and dust. If you notice any signs of bulging, seek professional repair promptly to prevent the rust from spreading and affecting the entire roof structure. Remember, sunroof maintenance isn't complicated—spending a little time cleaning can save you a lot of trouble.

[VanEmiliano]

My Tiggo 3 has been running for five years, and last year, the sunroof developed bulges and rust marks. At first, I thought it was just debris rubbing against it. But in reality, it was due to a flaw in the sealing design, where rainwater retention caused metal rust and corrosion. I later learned that the frame material of the Tiggo 3's sunroof has insufficient rust-proof treatment in certain environments. Coupled with owners like me neglecting maintenance—such as not regularly checking if the drainage holes are clear—water accumulation can easily lead to problems. Now, I make it a habit to clean the sunroof gaps with a vacuum cleaner every quarter to keep them dry. If you encounter a similar situation, promptly check whether the sealing strips are tight and replace them if necessary. Don’t take it lightly; acting early on repairs can save you thousands in repair costs.

[Shawn]

Sunroof bulging and rusting are mostly caused by sealing system failures. For the Tiggo 3, it commonly occurs due to clogged drainage pipes or aging sealant, allowing rainwater to accumulate and corrode the frame. When the metal rusts and expands, it forms bulges. It is recommended to first check if the drainage outlets are clear by flushing them with a soft hose. If the sealing strips are damaged, replace them promptly to prevent further deterioration. For the Tiggo 3, certain models may use ordinary steel with insufficient rust-proof coating, making them prone to issues in humid weather. For treatment, seek a professional shop for cleaning and reinforcement, and do not delay.