What Radiators Do

They're heatsinks. In other words, they help keep the engine in your Audi from overheating.

How a Radiator Works

In short, it uses coolant (antifreeze) to absorb the excess heat generated as your engine runs. Plus, it helps scatter the heat. The process is simple.

First, antifreeze flows through radiator hoses – inlet and outlet hoses, to be exact. The fluid gets pressurized by a radiator cap along the way. As it travels, it captures as much heat as it can. Then, flat, fin-style aluminum tubes expel the heat, with help from a fan to dispel it.

Some radiators have extra fins, called turbulators. They dissipate heat even better. Others have side-mounted tanks, called transmission coolers. They transfer the heat of transmission operation to the coolant.

Signs of Radiator Problems

Unfortunately, a radiator can go bad and even fail, but luckily, there are symptoms that'll tell you that's happening. They include:

  • Strange engine noises
  • A temperature gauge that reads unusually high
  • The sweet, syrupy odor of ethylene glycol (indicating a coolant leak)
  • Dirty or sludgy antifreeze
  • Coolant leaks
  • Heater and¬†air conditioning¬†malfunctions

To figure out what could be causing these problems, perform a thorough inspection.

Repair Your Audi Cooling System with Peace of Mind | Use a Genuine OEM Radiator

Whether you're looking to order a new radiator or just a few replacement cooling system parts, you've come to the right auto parts store. Our catalog has a vast selection, and everything's genuine, designed by Audi to work with the car or SUV model you drive, guaranteed. You can even order online. Buy now, and we'll ship fast, with delivery directly to your door.

4G0121081AE - : Engine Coolant Overflow Hose for Audi Image

Engine Coolant Overflow Hose

Vent tube. 2012-15, supply. 2.0L, 2012-15, to 02/16/2014. Reservoir hose. Diesel. Gas, supply, to 12/13/13.
$153.00 CAD
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7L8121070AF - : Engine Coolant Hose for Audi Image

Engine Coolant Hose

Supercharger Cooling. Auxiliary Water Pump To Pipe. Gas, auxiliary.
$87.00 CAD
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6E121045J - : Engine Coolant Pipe for Audi Image

Engine Coolant Pipe

Water pipe. 3.2L.
$304.00 CAD
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4F0121403M - : Engine Coolant Reservoir for Audi Image

Engine Coolant Reservoir

A6. Reservoir tank. 4.2L, main.
$135.00 CAD
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8W0121405L - : Engine Coolant Reservoir for Audi Image

Engine Coolant Reservoir

2017-2019, auto trans. 2017-20. A4 allroad. To 01/14/19. 45 tsfi. A5. 01/14/19 - 06/18/20. 2021-25.
$236.00 CAD
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8R0807823E - : Bumper Cover Spacer Panel for Audi Image

Bumper Cover Spacer Panel

2013-17 with S-LINE PKG. with park sensor. 2009-12 with S-LINE PKG. with park sensor.
$1,075.00 CAD
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4KL863821 - : Floor Pan Splash Shield for Audi Image

Floor Pan Splash Shield

Without wireless charger. Sportback. Suv.
$802.00 CAD
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8Y0805588 - : Radiator Support Panel for Audi Image

Radiator Support Panel

A3. S3.
$1,075.00 CAD
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8K0145804H - : Auxiliary Radiator for Audi Image

Auxiliary Radiator

2012-15 3.0 Liter Gas. 3.0 Liter 2010-2012 Cooler & Components. From 10/01/2013. Supercharger Cooling. To 10/01/2013. Fits A6, A7, A7...
$575.00 CAD
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4M0825219F - : Floor Pan Splash Shield for Audi Image

Floor Pan Splash Shield

Rear shield.
$138.50 CAD
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8R0121081M - : Engine Coolant Overflow Hose for Audi Image

Engine Coolant Overflow Hose

Reservoir hose. 2.0L, gas.
$113.00 CAD
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