Genuine OEM Lexus Cap, Wiper Arm Head, part number 8529252040. This cap is designed to fit over the head of the rear windscreen wiper arm, protecting the pivot mechanism from dirt, moisture, and debris. It ensures the smooth and reliable operation of the rear wiper system. This part is a cap for the rear windscreen wiper arm. Genuine OEM caps are made from durable materials to withstand environmental exposure and maintain the integrity of the wiper mechanism.