Spy photographers have caught a mysterious Volkswagen sedan undergoing cold weather testing.

Spied virtually undisguised, the prototype has a Passat-like appearance as it features a prominent VW emblem that is flanked by slender headlights. The similarities don’t end there as the car has vertical air curtains and a wide grille with horizontal bars.

While the front end is relatively plain, the prototype has a sculpted hood and curvaceous bodywork. They’re joined by a flowing shoulder line and a dynamic greenhouse, which is partially disguised. The model also sports a rakish windscreen and a sweeping roof.

The upscale styling continues out back thanks to eye-catching taillights with three dimensional elements. We can also see an unimaginative rear bumper and a trunk with an integrated spoiler.

 Mysterious New VW Sedan Spied With Passat-Inspired Styling

One of our spy photographers suggested the prototype could be the next-generation Jetta, but that seems unlikely. Instead, the car seems destined for China.

While that remains unconfirmed, Volkswagen offers a multitude of sedans in the country. If we were to guess, this could potentially be the next Chinese-spec Passat or Phideon.

More: Facelifted VW Phideon Flagship Sedan Revealed In China, Loses V6 And PHEV Powertrains

While everyone knows the Passat, the Phideon is a flagship sedan that starts at ¥343,000 ($47,718) and boasts upscale amenities. Among them are an adaptive air suspension, a refrigerator, and Nappa leather upholstery. The model can also be equipped with rear tray tables and power rear seats.

The current model was introduced in 2016 and updated in 2020, so it’s due for a redesign. However, only time will tell if the prototype is the Phideon or something else entirely.

Baldauf and SH Proshots for CarScoops