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.

4H0825213E - Body: Floor Pan Splash Shield for Audi Image

Floor Pan Splash Shield

S8, S8 Plus, 2011-18.
Positions: LEFT, Rear Left
$410.00 CAD
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N91044502 - Cooling System: Engine Oil Cooler Line O-Ring for Audi Image

Engine Oil Cooler Line O-Ring

With RS7. 4.0L, S8, S8 Plus. O-Ring. Tube to Block.
$126.00 CAD
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Fits Your Vehicle
4H0121612 - Cooling System: Engine Coolant Hose for Audi Image

Engine Coolant Hose

Turbocharger Cooling. Auxiliary Water Pump. Outlet. Pipe to Water Pump Housing. 4.0L, auxiliary, S8 Plus, engine code ddta, #5.
$102.00 CAD
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4H1819344 - HVAC: HVAC Heater Hose for Audi Image

HVAC Heater Hose

Auxiliary A/C & Heater. Inlet. Auxiliary Water Pump to Heater Core.
$361.00 CAD
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4H0121449N - Cooling System: Automatic Transmission Oil Cooler Hose for Audi Image

Automatic Transmission Oil Cooler Hose

ATF Cooler. Outlet. Cooler to Pipe. 4.0L, engine code ctgf. 4.2L, return, rear.
Positions: RIGHT
$57.00 CAD
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4G0121448BD - Cooling System: Engine Coolant Hose for Audi Image

Engine Coolant Hose

Outlet. Auxiliary ATF Cooler to Pipe. With RS7, rear.
$60.00 CAD
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4H0805594E - Body: Radiator Support Panel for Audi Image

Radiator Support Panel

Radiator Support Panel. Carrier. Center. Closure. Frame. Front c'member. Mount. Radiator. Fits A8, S7 Sportback, S8
Positions: Front
$1,184.00 CAD
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4H0121059 - Cooling System: Radiator Coolant Hose for Audi Image

Radiator Coolant Hose

Auxiliary Radiator. Center. To Reservoir Pipe and Auxiliary Water Pump. Assembly. Incl."T". 4.0L, auxiliary, S8 Plus, engine code ddta.
Positions: Lower
$270.00 CAD
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WHT001011 - Cooling System: Engine Coolant Pipe O-Ring for Audi Image

Engine Coolant Pipe O-Ring

12.2 x 1.65mm. 5.2L rear. With RS7, vent lines. 4.0L with RS7 front center. 4.2L, feed. 4.0L without RS7 main supply. 4.2L, supply.
$3.00 CAD
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4H0145804B - Cooling System: Auxiliary Radiator for Audi Image

Auxiliary Radiator

Auxiliary. Fits S7 Sportback, S8 4.0 Liter, Auxiliary, S8 Plus, Engine Code DDTA, center. 4.0 Liter, Auxiliary, S8, Engine Code CTFA,...
$1,380.00 CAD
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N90465003 - Cooling System: Engine Coolant Pipe O-Ring for Audi Image

Engine Coolant Pipe O-Ring

23 x 2.6mm. 4.0L with RS7 right front. 4.0L without RS7 main return. 3.0L.
$5.85 CAD
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