This cooler chills water quickly.
The car's radiator broke down and the engine overheated.
Specifically a freezer compartment or standalone freezer. 冷却器 can also mean freezer but is less specific.
Common loanword for a car radiator. 冷却器 is the native Japanese equivalent, often used in technical contexts.
Compound of 冷却 (cooling) + 器 (device, instrument).