What a car radiator does is keep your engine running relatively cool -- cool enough, in fact, to help prevent overheating. How car radiators work generally, though, is more complicated. The process starts inside your Volkswagen with coolant. As your engine runs, it creates heat, and the liquid captures that heat as it flows back and forth between inlets and outlets, through a radiator hose. A radiator cap compresses it as it travels, which helps the fluid take on more heat than it could unpressurized. After it captures the heat, the fins on the outside of your radiator expel it, and a fan disperses it into the air nearby. The result: your engine keeps working as well as it can, and resultantly, it lasts longer. Sometimes, a factory radiator goes bad, though, even one made by VW. If it does, it usually causes all kinds of problems. For example, your HVAC system starts malfunctioning. Plus, your engine can not only overheat but also shut down completely. Luckily, identifying radiator problems is easy. Fin damage and sludgy coolant usually indicate them. Also, listen for odd noises coming from your engine, and smell for a sweet, syrupy smell. The latter is ethylene glycol, and it indicates a coolant leak. If you think you might be dealing with radiator failure, look at your temperature gauge. If your engine's running hot, it'll tell you. Then, inspect your vehicle thoroughly. If the results tell you to replace your radiator, avoid the aftermarket because a genuine Volkswagen radiator will fit your model best. Our auto parts store stocks plenty, and you can buy one online with just a few clicks. So, check another DIY project off your to-do list. Order now!
Part Number: 5C0-121-251-M
Part Number: 5Q0-121-251-GN
Other Names: Auxiliary Radiator Radiator Assembly More Names
Replaces: 5Q0-121-251-EP, 5Q0-121-251-ET, 5Q0-121-251-FN, 5QM-121-251-A
Description: 2.0 Liter. 2.0 Liter, Code CNTB. 2.0 Liter, Code CYFB Main. 2.0 Liter, Code DHHA Main. 2.0 Liter, Code DLRA Main. 2.0 Liter, Gas Engine... More Info
- Golf Alltrack,
- Golf R,
- Golf SportWagen,
- 3 more
Part Number: 1K0-121-251-AB
Part Number: 1K0-121-251-CJ
Replaces: 1K0-121-251-AR, 1K0-121-251-R
Description: Radiator. Fits Jetta, Jetta Wagon, Rabbit, SportWagen Radiator - Repair or Replace Typical symptoms for a failed radiator include... More Info
Part Number: 1K0-198-251-CS
Replaces: 1K0-121-251-CS, 8P4-965-873
Description: Radiator Assembly. 650 x 454mm. To 05/31/2010. To 11/01/2009. Fits Beetle, Eos, GTI, Jetta, Jetta GLI, Jetta Wagon, Rabbit 2009,... More Info
Part Number: 5Q0-121-251-GL
Part Number: 5QM-121-251-F
Part Number: 5C0-121-251-E
Part Number: 5C0-121-251-L
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