CARFIX

Audi A5 TDI (2009–2012)

The Audi A5 (B8) produced from 2009 to 2012 is more than just a stylish coupe; it's a symbol of engineering excellence and refined design. Born from the A4 platform, the B8 A5 appeals to those who seek both beauty and performance. However, as these sophisticated machines mature, potential owners should remain vigilant about common issues and maintenance that are essential for the distinctive driving conditions in New Zealand. Budgeting for regular servicing is crucial to maintaining the brilliance of this vehicle.

Parts for the Audi A5 TDI

Known issues

Several common issues can plague the B8 A5. Oil consumption, particularly in the earlier 2.0L TFSI engines, is a well-documented problem due to piston ring design flaws. Carbon buildup on the intake valves of direct-injection engines (TFSI) can lead to reduced performance. Mechatronic unit failures in the S-Tronic (DSG) transmissions are not uncommon, resulting in rough shifting or complete transmission failure. The timing chain tensioner on early models could fail, leading to catastrophic engine damage. Other potential problems include faulty coolant thermostats, failing PCV valves, and worn suspension components.

WOF tips

When inspecting a B8 A5 for a WOF, pay close attention to the following: Suspension components, particularly the control arm bushings, are prone to wear and tear. Check for excessive play in the steering rack and tie rod ends. Ensure all lights are functioning correctly, as faulty bulbs or ballast resistors can cause WOF failures. Examine the brake rotors and pads for wear, and check the brake lines for corrosion. Verify that the exhaust system is free from leaks. A critical WOF item is oil leaks; check for excessive oil around the engine and undercarriage, as this can lead to a failed inspection.

About the Audi A5 TDI

The B8 A5 is offered with a commendable range of petrol and diesel engines. The 1.8L and 2.0L TFSI petrol engines are known for their harmonious interplay of power and efficiency, while the 2.0L TDI and V6 3.0 TDI diesel options bring reliability to the forefront. With the Quattro all-wheel drive available on numerous models, handling and traction are enhanced, especially during inclement weather. Inside the cabin, luxurious design meets ease of use through the intuitive MMI infotainment system, providing a seamless experience for navigation, audio, and control settings. Importantly, owners should keep an eye on key components that may require attention; for instance, the vehicle's cooling system, including the water pump, thermostat, and radiator hoses, should be inspected around the 150,000km mark to avoid issues down the line—linking perfectly to our Cooling service category.

As the A5 accumulates mileage, certain parts may need replacement more often, including brake pads and rotors, typically serviced at intervals of around 20,000km to 30,000km. Ensuring your stopping power is maintained will not only enhance safety but also provide peace of mind during your drives—a perfect segue into our Braking category. Additionally, regular changes of air filters and cabin filters are vital for optimal performance and comfort, fitting seamlessly into our offerings in Filtration. Each of these services plays a critical role in the A5’s upkeep, enhancing its durability and longevity as a cherished vehicle.

Questions owners ask

What are some common problems I should look out for in a used 2009-2012 Audi A5?
Several issues are known to affect the B8 A5. Oil consumption is a common problem, especially in earlier 2.0L TFSI engines due to piston ring design. Carbon buildup on intake valves can reduce performance. Mechatronic unit failures in S-Tronic (DSG) transmissions can cause rough shifting. Also, the timing chain tensioner on early models is known to fail, potentially causing significant engine damage. Coolant thermostats and PCV valves are also known to fail.
Where can I get brake pads and rotors for my 2009-2012 Audi A5 in New Zealand?
CARFIX stocks a wide range of brake pads and rotors for the 2009-2012 Audi A5. You can find suitable replacements in our [Braking category](/shop/braking). Brake pads and rotors typically need servicing every 20,000km to 30,000km.
What should I check on my 2009-2012 Audi A5 to pass a WOF in New Zealand?
For a WOF, pay close attention to suspension components, especially control arm bushings, for wear. Check for play in the steering rack and tie rod ends. Ensure all lights are working. Inspect brake rotors and pads for wear and brake lines for corrosion. The exhaust system must be free of leaks. Critically, check for oil leaks around the engine and undercarriage.
How often should I change the air and cabin filters on my 2009-2012 Audi A5?
Regular changes of air and cabin filters are vital for optimal performance and comfort in your Audi A5. While the exact interval can vary, it's generally recommended to replace them every 15,000km to 30,000km, or as part of your regular servicing schedule. You can find suitable replacements in our [Filtration](/shop/filtration) category.
My Audi A5 2.0L TFSI seems to be losing power. What could be the cause?
A loss of power in the 2.0L TFSI engine can often be attributed to carbon buildup on the intake valves. This is a common issue with direct-injection engines. Another potential cause is excessive oil consumption, which is a known problem in these engines. A faulty PCV valve could also contribute to power loss.
When should I replace the water pump and thermostat on my 2009-2012 Audi A5?
It's a good idea to inspect the cooling system components, including the water pump, thermostat, and radiator hoses, around the 150,000km mark. Replacing these components proactively can prevent potential cooling system failures and overheating.
What kind of engine oil does my 2009-2012 Audi A5 need?
The specific engine oil requirements for your 2009-2012 Audi A5 will depend on the exact engine type (e.g., 1.8L TFSI, 2.0L TFSI, 2.0L TDI, 3.0L TDI). Consult your owner's manual or a qualified mechanic to determine the correct oil specification (e.g., VW 502.00, VW 504.00) and viscosity grade (e.g., 5W-30) for your engine.