Air filter on a standard car in optimal conditions is an important item, however if you live in a place like Australia where it would be much stranger to not get dirt into your engine, and if you drive a pick up like the Toyota Hilux, then a proper Hilux air filter is one of the most integral components for your car.
Source: https://www.factorydirect4x4exhausts.com.au/accessories/air-filters/toyota
