Just like on most other cars, the 2011 ES350 radiator cools off coolant so that the engine's temperature can be properly regulated. A damaged radiator might leak coolant, resulting in low coolant levels. Even if the radiator is not leaking, it will likely not work as efficiently, possibly letting the engine overheat. Find the right part and the right price in this selection of 2011 Lexus ES350 radiators.