Falcon Wings: The Doors That Defined, and Delayed, the Model X

On February 9, 2012, Tesla unveiled a prototype crossover at its design studio in Hawthorne, California. The Model X had one feature that set it apart from every SUV on sale: rear passenger doors, hinged at the roof, that opened upward instead of out to the side. Tesla called them falcon-wing doors.

The idea was meant to be practical as well as theatrical: a door that rose instead of swinging outward would not need a wide arc into the next parking space. By 2013 Tesla had applied for a patent on the design. Turning a show-stand prototype into a door that could be built by the thousands, open and close for years, and avoid hitting neighboring cars or a garage ceiling proved much harder than drawing it. In March 2023 Tesla shared an old video showing how the falcon-wing doors were created, including the original prototype, a rare look at the development work that sat behind the finished part.

Tesla hired Hoerbiger Automotive Comfort Systems to develop the hydraulic system that would lift the doors. The relationship went badly. According to the complaint Tesla later filed in federal court, between February 2014 and May 2015 Hoerbiger could not produce a prototype that met Tesla's engineering standards, because it "leaked oil and sagged or produced excessive heat."

In May 2015, roughly four months before the Model X was due to launch, Tesla dropped Hoerbiger and turned to another supplier. The production doors that eventually reached customers are driven by electric motors. The switch came late in a program that had already been delayed for months.

The dispute went to court in January 2016. Tesla sued Hoerbiger in the U.S. District Court for the Northern District of California, asking the court to stop the supplier from demanding further payment after Tesla had cut ties. The two companies settled in September 2016.

Tesla finally launched the production Model X at its factory in Fremont, California, at 7 p.m. Pacific time on September 29, 2015, more than three and a half years after the Hawthorne reveal. Even the invitations put the doors first, showing the dual-hinged wings rising upward. A handful of first owners took delivery of their cars on stage that night. Tesla had offered early reservation holders the chance to buy Signature editions, and the new electric SUV was priced from around $80,000.

Getting cars into customers' hands in volume took longer. Parts shortages held back production into 2016, and on February 10, 2016, Musk publicly conceded that the first version of the Model X had tried to pack in too many new features. Tesla put it more bluntly in its first-quarter 2016 update to investors in April, filed with the Securities and Exchange Commission. It listed the root causes of the shortages as "Tesla's hubris in adding far too much new technology to the Model X in version 1, insufficient supplier capability validation, and Tesla not having broad enough internal capability to manufacture the parts in-house."

Musk returned to the theme in mid-2016, saying the better approach would have been to hold many of the advanced features back for later versions of the car instead of putting them all into the first one.

What makes the falcon-wing doors work in a crowded garage is a web of sensors and a second hinge. Each door is double-hinged, so it can rise upward first and then fold outward, changing the shape of its arc to suit the space available. Tesla engineers said the doors can open with as little as about 12 inches of space beside the car.

Three kinds of sensing guard the doors. Ultrasonic sensors, a sonar design Tesla developed to work through the door's metal skin instead of through the round puck sensors used on bumpers, look for walls and neighboring cars. Capacitive sensors along the door edges detect obstacles within 2 to 4 inches, and inductive sensors add another layer. Together they let the door stop or change its path before it touches a car to the side or a low garage ceiling above. Tesla's service manual for the Model X lists the ultrasonic door sensor modules as their own replaceable parts, a reminder of how much hardware sits inside each door.

All of that hardware is exactly the kind of first-of-a-kind technology that the April 2016 letter had blamed for the shortages. It also gave the Model X an identity no rival crossover could copy without the same engineering effort.

The Model X's most unusual public test had nothing to do with its doors. In May 2018 at Melbourne Airport in Australia, Tesla and Qantas hitched a Model X P100D to a Qantas Boeing 787-9 Dreamliner, registration VH-ZND, and the SUV pulled the jet about 300 meters, or roughly 987 feet, along the tarmac. The airliner weighed about 130 tonnes, or roughly 286,600 pounds, and Guinness World Records recognized the run as the heaviest tow by a production electric passenger vehicle. The Model X's official tow rating is about 5,500 pounds.

The aircraft was one of the newest 787-9s in the Qantas fleet, and it was the first time a production electric car had towed a passenger airliner.

Two years later the Model X carried a more precious cargo. For NASA's SpaceX Demo-2 mission, astronauts Bob Behnken and Doug Hurley rode to Launch Complex 39A at Kennedy Space Center in a Model X wearing NASA's worm logo and a license plate reading ISSBND. They rode in it during a dress rehearsal on May 23, 2020, and to the pad for the first launch attempt on May 27, which did not end in a launch. On May 30, 2020, their SpaceX rocket lifted off, the first launch of astronauts on an American rocket from American soil since the space shuttle's retirement in 2011.

The Model X's own production run ended in 2026. On Tesla's fourth-quarter earnings call on January 28, 2026, Musk said, "It's time to basically bring the Model S and X programs to an end with an honorable discharge," and explained that the Fremont space would be replaced "with a 1 million unit per year line of Optimus," Tesla's humanoid robot. Tesla closed out the car with a Signature Edition of 100 six-seat Model X crossovers, all painted in an exclusive Garnet Red. On May 2, 2026, Fremont workers signed the body of the very last Model X before it received its Garnet Red paint, and Tesla held the delivery event for the final Signature cars at Fremont on May 20, 2026, after moving it from May 12.

After eleven years in production, the Model X leaves behind a clear legacy. Its doors were difficult, expensive and, by Tesla's own admission, part of a first version that tried to do too much. They were also the reason people stopped in parking lots to watch one open.