there isn't a radiator in a vw passat. Vw's in general don't have radiators.
Usually you can find a round container, shaped like a ball, with a black cap under the hood near the windshield washer container. It should be about half full of greenish antifreeze. To fill, simply unscrew the black cap when the engine is cold and add your antifreeze up to the full mark, it is hard to see, but half full is where the full mark is (at the seam). The antifreeze needs room to expand when it gets hot so dont fill it to the top. The hose on the bottom of that container goes to the engine and then to the radiator. NEVER take the cap off when the engine is hot. It could explode in your face. This works for all Golfs, New Beetles and Passats. And yes they all have radiators. KGP 484
http://www.fishh2o.com/Misc/Misc/Passat%20Radiator.html
Please clarify. Are you looking for one, or are you asking for information about one?
If you have a 1999 Passat V6, the coolant temperature sensor is located in the lower radiator hose.
The radiator is located beneathe a plastic cover in front of the engine, between the headlight housings. Follow the upper radiator hose to locate it.
It is an engine cooling fan that cools the fluid as it passes through the radiator.
Fill the reservoir with G12 VW coolant only and it will go into the engine.
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you don't fill the radiator directly, there is no radiator fill cap. you fill the overflow reservoir and it keeps the radiator full. overflow reservoir is spherical plastic near firewall. power steering reservoir is up front near battery.
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