Without knowing the make and model we can’t really say. A lot of laptops these days have their sound hardware integrated with the motherboard, so there’s no “subboard” to replace.
That said, for things that are not integrated there are one or two options: Remove a screw and pop it out of an M.2 slot and install a new one, or remove or a screw or two and lift it off of a friction-fit connector.
My guess would be half that. Six years at the outside.