“Wheel arches” refer to the contoured panels around each wheel’s opening in the vehicle’s body. On many SUVs like the Prado, these include extra moulding or flare trims (plastic/ABS/styrene) to: Protect paint/body from stones, dirt, mud thrown up by the tyres Prevent rust or damage to the metal behind Improve aesthetics: give a rugged, offroad‑look or wider stance Allow for larger tyre + wheel combinations by increasing clearance or protecting body when tyres protrude more