The Ending makes no sense
This movie has a wonderful 1980s vibe/feeling/atmosphere/etc. It's one of those things you just can't plan, design and fabricate by a cold, corporate committee in the modern times.
It's a very silly movie, where not a whole lot makes any sense, it also doesn't dare take the more interesting path of 'soul incarnation' and 'Creator of the Universe told me', but instead opts for the materialistic-nihilistic cliché of 'a mysterious lightning bolt' and 'I told me'. Sigh. Why would YOU tell you, if you have no soul and don't get morals from the divine?
In any case, it's a charming movie with only some amount of misandry, a fun romp not to be taken too seriously.
However, when you start thinking about the details, many things fall apart.
For example, the ending.
There are numerous things that make no sense about the whole 'I built a replica of myself from spare parts'-idea.
First, you can't build a new, functional car from just 'spare parts of a car', can you? I don't think the best mechanics in the world could just build a functional car from some loose spare parts. You need factory robots (yeah, the irony is staggering here) to build the chassis, weld things together in a very precise manner, build the engines/motors/etc. and to even think about the electronics.. yeah, humans don't build microchips, processors, computers, motherboards, etc. from scratch. They may assist at some point, but basically you need robots and computers to build those things.
There's no auto garage that would have even close to not only the amount of parts you'd need to build even a simple car, but to have any kind of manufacturing process... let's just say it's impossible.
I know a robot is not a car, but it's the 'relatable equivalency' anyone can understand. An expensive, experimental, well-engineered robot like that would not be buildable from spare parts, there's no way that van vould hold ALL the pieces needed for a 'replica' like that.
Second, these robots are expensive. SUPER expensive! Eleven (groan, another masonic number.. it's never ten or twelve, it's always eleven, thirteen or thirty-three. Just watch movies with those numbers in mind, and you'll be surprised to notice how pretty much EVERYTHING is always 11 minutes, 11 years, 11 people, or 33 bottles of beer.. just be warned, it is a bit shocking in the long run, and annoying how predictable it is) million dollars per robot.
If spare parts are that plentiful and every Nova van is full of them, then why are they counted as 0 dollars? The nerdy boss talks about 22 million dollars, referring to Number 5 and another robot they are taking with them - but he never mentions how the van itself is full of 'spare parts' that can be used to build a WHOLE REPLICA of another robot! This would mean it's YET another 11 million dollars!
So why doesn't he say 33 million dollars? (Would've been even more masonic that way..)
Then again, we don't even know how MANY of those spare parts those vans have - does every Nova van have those? How many million dollars are we talking about, how many replicas COULD be built from those parts?
Third, these robots are expensive - had to mention that once more - so every expensive, experimental, unique, painstakingly engineered and manufactured part would he super valuable to Nova, and they would have catalogued them and they would track where every single part is... RIGHT?
RIGHT?!
I mean, how could it be otherwise? What corporation would just manufacture super expensive spare parts of an experimental robot line and then just let those expensive spare parts (that can be used to build a whole robot, so maybe even more than one, so how much money would that entail? 44 million? And this is just ONE van!) roam free without any kind of tracking of who is using them, where they are stored and so on?
This means, Nova would know exactly how many robot parts they have manufactured, how many are in each van, which parts are in which van - heck, each 'spare part' has a serial number most likely!
This means Nova would soon figure it out - they blew up a bunch of spare parts arranged to a robot form, and they are still missing one whole robot! The catalogue of 'spare parts' and vans do not match with the surprisingly small amount of spare parts in that one van, so something is seriously wrong, and they must know they have millions upon millions of dollars worth of 'spare parts' OR robots (what's the difference at this point..?) MISSING.
Nova would KNOW that van is missing a whole robotful of 'spare parts', and as I mentioned, these robots (and thus, the 'spare parts') are super expensive, so the corporation would DEFINITELY be interested and want to track down where every single part is.
So why would they let Stephanie and Newton (really, as in Isaac Newton?) just drive away with all those spare parts and the van?