車は車輪がよぅつあります。 Car has 4 wheels. You can say many, few, a number, etc so the lack of plurality is overstated I suspect. You can use context to derive the plural

車は車輪がよぅつあります。 Car has 4 wheels. You can say many, few, a number, etc so the lack of plurality is overstated I suspect. You can use context to derive the plurality when none is given.