BYD has filed a design patent in China showing what appears to be a stretched Denza D9, potentially giving its luxury MPV range a larger model with more rear passenger space.
The patent was published by China’s National Intellectual Property Administration (CNIPA) on Nov 10 following submission by BYD on June 3, 2025.
The drawings show the rear axle positioned farther back than on the regular D9, accompanied by longer third-row side windows. The changes suggest additional cabin length, although the interior layout has not been disclosed.
Based on a comparison of the drawings, estimates put the wheelbase at around 3,340 mm, an increase of roughly 230 mm over the standard D9’s 3,110 mm. Overall length could reach about 5,480 mm, against the existing model’s 5,250 mm. These are unofficial estimates.
The larger MPV also features a redesigned front grille with vertical detailing, revised front lighting-area styling and changes to the rear bodywork.
A roof-mounted LiDAR unit is visible, while BYD’s global design director Wolfgang Egger is among the designers named in the filing.
Chinese automotive media have referred to the vehicle as the D9L, but Denza has not confirmed that designation.
The current D9 is available in China with battery-electric and plug-in hybrid powertrains. However, the design patent provides no mechanical specifications or confirmation of production plans.
In Malaysia, Denza has teased today an updated D9, following the model’s local introduction in February 2025. There is no confirmed connection between the Malaysian update and the longer version depicted in the patent.
