There are a lot of things that set your Audi apart from other vehicles on the road:

  • Luxury features
  • Rich interior
  • Superior fit and finish

However, it isn’t just the superficial things that make your Audi stand out. Take a look under the bonnet, and you’ll see that the engineering on display is on a whole other level – there’s a reason German engineering has such a stellar reputation worldwide!

Audis feature a range of unique features that you won’t find in other makes, specifically designed to improve performance and maximise fuel-efficiency, no matter what model you drive.

One of these features is Audi’s unique electrical coolant pump.

What makes this different from traditional belt-driven coolant pumps? And what sort of unique issues can arise with this system? What should you do if an Audi coolant warning light starts flashing?

Luckily for you, our Audi mechanics in Melbourne are here to break it down for you…

Why electrical coolant pumps?

Any car lover knows that coolant is a crucial part of keeping your engine operating at its peak by circulating crucial coolant throughout your engine.

A lot of older car owners say that mechanical (or belt-driven) systems are the way to go, and that electrical systems aren’t powerful enough to deal with day-to-day driving.

That may have been true 20 years ago. If you ask our Audi mechanics in Melbourne however, electrical coolant pumps have long since closed the reliability gap.

Not to mention, the increase in precision and control that an electrical coolant pump offers is completely worth it!

Your electrical coolant pump is controlled by your Audi’s engine control unit (ECU). Sensors in the engine actively monitor temperatures, with the ECU commanding your electronic Audi coolant pump to allow exactly the amount of coolant needed to maintain the optimal temperature.

Any part of your vehicle that runs off engine power is “taking away” power from your engine. A mechanical or belt-driven coolant pump could be robbing you of horsepower or fuel efficiency – since electrical Audi coolant pumps are powered by your car battery however, Audi owners don’t have to deal with this problem.

Sure, for most people this won’t make much of a difference at all. That said, there are some petrolheads out there who do care about the slight hit to performance – if you’re one of them, electrical coolant pumps are a godsend!

Audi electric coolant pump

Engine overheating? It could be an Audi electric coolant pump problem

Car engines run hot – Audi engines especially so. If the temperature gets too high, that can lead to a whole range of different issues with your Audi:

  • Cracked cylinder heads
  • Burnt pistons
  • Your engine can seize up
  • Your Audi going into limp mode

In short, there’s the potential for significant engine damage should your Audi start overheating.

It’s these outcomes that your Audi’s cooling system is designed to help avoid. By circulating specially-designed coolant with an extremely high boiling point through critical parts of the engine, your Audi is able to absorb much of this heat, preventing overheating issues.

If your electrical coolant pump isn’t working however, coolant isn’t flowing. And if coolant isn’t flowing, your engine will overheat – simple as that.

But what exactly causes the electric coolant pump in your Audi’s engine to fail?

It could be that you’ve sprung a coolant leak

Your coolant system is made up of a range of different parts, all of which are specially designed to last as long as possible and keep your engine at a safe operating temperature.

Our Audi mechanics in Melbourne have noticed that while many of the core parts are strong and durable, the seals that hold it all together and stop water and antifreeze from leaking are prone to wearing out.

When these seals fail, you’ve got a problem on your hands.

A leak reduces the amount of coolant available – if the issue goes undetected or you ignore your Audi coolant warning light, you could find yourself running out of coolant altogether.

And that in turn leads to your engine overheating, and all the issues and risks associated with that.

Electrical faults can cause your Audi’s electric coolant pump to fail

All parts in your engine can wear out given enough damage – your electric coolant pump is no different.

It isn’t unheard of for the wiring in your Audi’s electric coolant pump to wear out, negatively impacting (or even stopping) the flow of coolant:

  • A wire may come loose
  • The circuit might be damaged
  • Old age and usage can affect your Audi coolant pumps’ reliability
  • The electric motor might wear out

In some cases however, coolant leaks can also cause electrical faults.

Speaking of which…

Moisture-related short-circuits

Our Audi mechanics in Melbourne have worked on several Audis where coolant has leaked and gotten into the electrical wiring.

As we all know, liquid and electronics don’t mix – naturally, when coolant leaks into the wiring that supplies power to your electric coolant pump, this can cause all manner of different faults and issues.

In some instances, this can also cause a short-circuit, and can even increase your fire risk (theoretically, at least – fortunately, our Audi specialists in Melbourne couldn’t find any real-world cases of this happening).

In these cases, the only solution is to replace the damaged wiring, connectors and terminals  – something that our Audi specialists can do for you.

Debris buildup

It isn’t unheard of for debris to get into your Audi’s electric coolant pump. It could be flakes of rust, dissolved particles from system components or other types of debris from the cooling system like clumps of dried coolant.

These blockages can impede the flow of the all-important coolant, leading to a host of overheating problems as your engine isn’t cooling down like it should.

Our mechanics can clear out these blockages by performing a coolant flush as part of your next Audi service in Melbourne, helping you avoid these issues.

Are there any models I should look out for?

Any vehicle may run into coolant pump issues over its lifetime – these issues can potentially arise in any Audi equipped with an electric coolant pump.

Debris buildup and leaks can occur in any car’s coolant system given enough time. The electrical ones however are a bit less common – we’ve noticed that there are only a handful of models that present with these particular issues.


  • 2013-17 Audi A4 sedans and Allroads
  • 2013-17 A5 coupes and cabriolets
  • 2012-15 A6
  • 2013-17 Q5 crossovers

Each of these models are equipped with the automaker’s 2.0-litre TFSI engine.

Do you drive one of these particular models? We recommend dredging up your Audi’s logbook to make sure that your Audi’s electric coolant pump has been looked at.

And if it hasn’t? In that case, it’s time to book an Audi service in Melbourne, ASAP!

Why you need an Audi specialist

Simple: because you drive an Audi. It’s a valuable, high-performance vehicle – you wouldn’t entrust it to just any old mechanic, would you?

No, you want it to get only the best.

Our Audi mechanics in Melbourne are true specialists. Over the years, we’ve worked on just about every make and model of Audi there is, including models affected by electric coolant pump issues.

We can replace the affected coolant pump, wiring and connectors returning your Audi to its normal operating condition. Our extensive supplier relationships with both genuine and OEM manufacturers, you can rest easy knowing that your Audi’s engine won’t overheat again anytime soon.

While we’re there, we’ll also give your Audi a full service, ensuring that all of its parts and systems are up-to-date and safe.

And we’ll do it at a fraction of the cost of a dealership, using alternate repair methods to bring down your Audi service cost.

If you drive an Audi (or a Mercedes-Benz, BMW or Volkswagen), we’re your guys. Get in touch with our independent Audi mechanics in Melbourne today:

Alternatively, click here to make an appointment online!