Translation:The motor and the wheel will be necessary.
Apparently motor ≠ engine I'm not a native english speaker, so could someone please help me with the difference?
When a distinction between a "motor" and an "engine" is made in English, a motor is a device that draws its energy from an outside source (like an electric motor) and an engine converts fuel into energy within the device (like a diesel engine).
It usually doesn't matter much, though. Unless you're locked in a room full of engineers, most English speakers don't know the difference. Besides, this sentence could have have been about either an electric or gasoline-powered car!
Actually, I'd say that both would work in this case.
Both words have other meanings in other contexts (such as motor skills or fire engines) but in this sentence, their meanings overlap.
Ankaŭ oni povas skribi "La motoro kaj la rado estos necesoj", neceso = necessity
It sounded to me like the voice was actually saying "necesoj" rather than "necesaj."