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.

80A122073C - : HVAC Heater Hose for Audi Image

HVAC Heater Hose

Auxiliary Water Pump to Upper Radiator Coolant Hose.
$100.00 CAD
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8W6825208B - : Floor Pan Splash Shield for Audi Image

Floor Pan Splash Shield

Hatchback. Coupe, from 01/15/2018.
$638.00 CAD
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7L6121109R - : Engine Coolant Hose for Audi Image

Engine Coolant Hose

Pipe to Pipe. From Reservoir Pipe. 4.2L, return.
$16.45 CAD
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8R0121333G - : Air Guide for Audi Image

Air Guide

3.0L gas, auxiliary.
$249.00 CAD
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N91093902 - : Bracket Rivet for Audi Image

Bracket Rivet

With Q8 s-line exterior or SQ8, mount components. Q8, without s-line exterior, mount components.
$1.17 CAD
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8Y4807820D9B9 - : Trim for Audi Image

Trim

Trim. S3, 2025-26. 2025-26, cover and components, to 09/29/2025.
$56.00 CAD
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8Y0121674D - : Radiator Support Air Duct for Audi Image

Radiator Support Air Duct

S3. outer.
$192.00 CAD
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80F807319D - : Bumper Cover Spacer Panel for Audi Image

Bumper Cover Spacer Panel

Contact plate. With sportback, Q5.
$435.00 CAD
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