This is a genuine Toyota water pump assembly, part number 16100-09491, suitable for direct replacement in various Toyota models. The product includes only part reference #4 on the diagram and comes with a gasket. It is a high-quality OEM part that fits perfectly and is made to last. The manufacturer part number for this assembly is 16100-09491, and it is compatible with part numbers 16100-09490, 16100-39495, and 16100-39496. This water pump assembly is designed for engine cooling components and is a must-have for anyone replacing a faulty or worn-out part. It comes with a 1-year manufacturer warranty, ensuring that the product is genuine and made to last. Get this Toyota water pump assembly today and enjoy the peace of mind that comes with using a high-quality OEM part for your vehicle.