Following initial sightings of Model S vehicles with validation rigs in California, detailed reports confirm LiDAR equipment for Full Self-Driving and Robotaxi validation—marking the first use of the premium sedan in this role.
Building on reports from December 11, 2025, of two Tesla Model S vehicles spotted in California with validation rigs akin to those on Model Y test mules, new details identify the equipment as LiDAR setups specifically for Full Self-Driving (FSD) and Robotaxi testing. This represents the first documented instance of Model S being used for such validation, diverging from Tesla's standard reliance on Model Y vehicles sighted on the East Coast.
The premium flagship Model S could expand the Robotaxi fleet to include luxury options, akin to Uber Black, accommodating riders seeking enhanced features. Elon Musk has noted ongoing production of Model S and Model X for 'sentimental reasons' despite lower volumes, and this testing may justify continued manufacturing by integrating it into ride-hailing.
Tesla's deliberate engineering approach implies intentional selection of Model S. No official confirmation on fleet plans has been issued. The developments were reported by Teslarati journalist Joey Klender via tweet.
