I want to explain once again that this is a not true. At all. Adding a DIY rear camera is a singe subsystem that isn’t connected to anything other than a display via a wire. And it has other issues as well - aiming, movement, various failure modes, etc. But the biggest issue is that it isn’t connected to the “brain” that processes all the images coming in every few milliseconds to determine what actions the autonomous driving engine (“engine” as in software) needs to take. Adding a front bumper camera is a VERY COMPLEX task, mechanically complex (for example, it needs to be mounted properly to point in the right direction), structurally complex (can’t move around too much when the bumper is tapped by another vehicle in a parking lot), architecturally complex (it needs a proper wiring harness), and most of all it needs to be connected to the main MCU that processes all video coming in (as described above). I am pretty sure that the Tesla MCU3 (and definitely MCU4) has additional video inputs. But I am not sure if the processor has the bandwidth to process those additional inputs yet (or ever in MCU3). MCU4 can very likely process more inputs, and I wouldn’t be surprised to see new models come out with this additional camera properly connected and processed.
Even for Tesla to add it to a previously sold car would be a huge undertaking, and would be extremely expensive. And may not even be possible due to the structural limitations of current bumpers. At best, if they attempted it (and I bet they have attempted it already), it would be a substandard solution to the problem, and Tesla, in general, despises substandard solutions.
I’ve used recent versions of FSD (the beta versions with all the bells and whistles), and it can NEVER EVER do this. Try it yourself - get in the car, enter a destination, and tap the stalk down twice to enter FSD mode. What does the car do? NOTHING. It will not start moving. Only the driver can do that, and then later engage FSD. That means that the car always requires a driver. In my case, I need to pull out of my driveway (whether facing forwards or backwards), then drive up my street, and only then can I engage FSD. Two thirds of the time it’ll take over at that point, but the other third of the time, it requests that I drive a few more tens of yards (two turns to exit my housing development) before it’ll engage FSD.
Similarly, when it arrives at the destinations, the FSD will disengage RIGHT IN MIDDLE OF THE STREET in front of the destination address! Again, the driver has to take over, and drive it into the parking area, and park it. Even when the FSD can handle the complete drive on its own, and I’ve experienced many such cases (trust me, it’s like magic, and it thrills me every time, everyone should experience it*), but FSD is not F, at a minimum it requires a driver at the start location and at the end location. So when so many people (Like Elon Musk, for example) say that the current fleet of a few million Teslas can easily be converted to a fleet of robotaxis, I have very strong doubts that that is probable or even possible.
The current model 3 and Y production, the VAST majority of all Teslas, don’t include a radar module. The folks in this article probably looked at an X or an S model.
* Even TACC is kind of like magic. I drove 300+ miles yesterday mostly with TACC, and it makes driving so much more pleasurable and relaxing. But FSD is truly magical. I took a family member on a ride a while back and they were blown away. They were scared at first, but a few miles in, they had already got used to it. By the end of the trip, they were just amazed. It took us about 17-18 miles on normal streets with stoplights and stop signs, with left turns and right turns, and a merge, and one unprotected left turn. It did quite a lot of “good driving” and one or two instances of “not so good driving” (too much hesitation and creeping up in one case, and a too quick right turn in another case). But I only had to take over once (in addition to the start and end of the trip) in those 17-18 miles and that was only because of my own impatience, the car would have figured it out eventually. It’s just surreal to sit in the car and see it stopping, “looking”, and then turning, all on its own!