BYD Ti7 EV Owners in China Report Glass Roof Detachment, Leaks, and Flooded Charge Ports

Chinese owners of the BYD Ti7 EV are reporting that the panoramic glass roof detaches at the left-rear corner, leading to water leaks and pooling at the charging port. Over 300 complaints have been logged on a local platform since the EV variant launched in late April, though the issue has not affected PHEV versions.

BYD's Fang Cheng Bao (FCB) Ti7 SUV is facing a growing number of complaints in China concerning its panoramic glass roof. Owners allege that the glass panel becomes loose at the left-rear corner, resulting in water ingress, increased wind noise, and moisture accumulation around the rear charging port.

The Chinese auto consumer complaints platform 12365auto has recorded 300 Ti7 complaints since the model's market introduction in September 2025. Roof-related issues have surfaced exclusively on the Ti7 EV, with the first reports appearing shortly after the electric variant's launch on April 30.

While the vehicle is marketed domestically under the FCB sub-brand, export markets will receive both the PHEV and EV versions as the BYD Ti7.

According to owner accounts, the panoramic glass roof only detaches at the left-rear corner, and the problem typically arises within a week of delivery. Reports indicate that the glass panel can be temporarily pushed back into place but does not stay secured.

The left-rear corner of the Ti7’s glass roof, lifted up from the body shell. Credit: 12365auto

The consumer guidance platform SMZDM has reported that roof leaks have led to flooding at the Ti7's charging port. A complaint filed with 12365auto on June 23 has since been removed.

3YC Ownership Report, a BYD-focused account on WeChat, speculates that the defect stems from production process issues, such as uneven adhesive application or force imbalances during glass roof installation.

Since the problem is limited to the latest EV Ti7s, a design flaw across the entire Ti7 lineup appears unlikely. No PHEV Ti7s have reported roof issues so far.

BYD and its FCB dealers have responded to 99.2% of the 300 complaints, including those related to the glass roof, but owners remain dissatisfied. One owner claims that BYD's after-sales service contacted them and offered compensation in exchange for deleting the complaint. However, after the complaint was retracted, no agreement was reached, and no repairs or compensation were provided.

As of this writing, 31 formal complaints have been filed specifically about the detached glass roof. BYD has stated that the issues have been forwarded to the relevant authorities and that owners should wait for staff to contact them.

The FCB Ti7’s domestic deliveries, September 2025 to May 2026.
Source: China EV DataTracker

The Ti7, also known as the Tai 7, is sold under the FCB sub-brand in China. According to China EV DataTracker, 17,510 Ti7s were delivered domestically in May 2026. This is a decline from the peak of 34,086 units in December 2025, when the Ti7 briefly became China's third best-selling SUV.

BYD and FCB increased Ti7 EV deliveries in May and June 2026, with 1,800 and 4,554 units, respectively. The glass roof issues are believed to have emerged during this production ramp-up, and the automaker is expected to issue a public statement soon.

Source: 12365auto, SMZDM, 3YC Ownership Report, Fang Cheng Bao (FCB)