The director of autonomous integration at General Motors, Scott Miller, said Elon Musk’s claims on Tesla’s autonomous driving capabilities are “full of crap” and entirely false, according to a report by Car Advice. One such claim even made its way to Tesla’s own website, stating that all vehicles produced in its factory “have the hardware needed for full self-driving capability,” of which includes a radar, several sensors and at least eight cameras.

“Just because you can drive from Los Angeles to New York with current level two or level three technology doesn’t necessarily mean that it has level five technology as defined by the SAE. To be what an SAE level five full autonomous system is, I don’t think he has the content to do that,” said Miller.

Miller went on to say that it’s not physically possible to be a full level five with just cameras and radars. It needs to have the right sensors and proper computing package to do it. “Do you really want to trust just one sensor measuring the speed of the car coming out of an intersection before you pull out? I think you need some confirmation. So, radar and LIDAR (Light Detection and Ranging) do a good job at measuring object speed, cameras do a great job at identifying objects,” he added.

Seen here is a millimetre wave radar and LIDAR sensors fitted onto a modified Lexus GS

Miller also said the current crop of Tesla cars don’t have what it takes for full autonomy, but gave a timeframe of 15 years for the technology to be matured enough for public use. Currently, the new SuperCruise system, which allows level two autonomous driving on the highway, is available on the Cadillac CT6. Tesla’s Autopilot system on the other hand, falls under the level three category, which allows the driver to take his/her hands off the wheel, but requires driver intervention whenever necessary.

Earlier in July, Musk said “it will be rare for a car to be produced in 10 years’ time that is not autonomous,” and in 20 years cars will no longer come with a steering wheel. An example of cars with level three autonomous driving is the new Audi A8, which is capable of driving itself on highways at speeds below 60 km/h in traffic.

We were in Japan two years ago to sample Toyota’s version of autonomous driving technology – cheekily named Toyota Highway Teammate – with a video of its actual demonstration on public roads. The Lexus GS was equipped with various sensory equipment such as a “millimetre wave radar,” a light detection and ranging sensor (LIDAR) and a camera placed atop the front mid section of the roof, all of which give the car a 360 degree “view” of its surroundings. Watch the video below to see how the system works.

GALLERY: Lexus GS with Toyota Mobility Teammate Concept