Explore Toyota 4 Runner Cooling system component & Toyota 4 Runner Coolant reservoir. Shop Toyota 4 Runner Engine radiator flush. Maintaining your Toyota 4Runner's radiator and components is crucial for engine health, where regular coolant changes and inspections for leaks or corrosion can significantly extend their lifespan. When you notice persistent overheating, coolant discoloration, or a sludge-like substance under the hood, it's likely time for a replacement. Our online selection includes various high-quality radiators and parts, crafted from durable materials to ensure efficient cooling and easy installation. Opt for the perfect match from aluminum to plastic tank radiators, each offering unique cooling efficiencies for your 4Runner, and get back on the road with confidence, knowing your vehicle is equipped with top-tier thermal management solutions.