Common Problems on the C7 Audi A6

The C7 Audi A6 was introduced in the United States in 2012 and continued to 2018. This generation of full-size executive sedans offered a range of powertrain configurations, in addition to advanced technology, luxurious interiors, and sporty driving dynamics. Throughout its run, the C7 A6 went through one facelift, with both gasoline, diesel, front-wheel drive, and all-wheel drive options available.

If you are considering a used C7 or are curious what some of the common problems on this generation of A6 are, you are in the right place.

C7 A6 engine options

This generation A6 offered multiple engines, transmissions, and drivetrain layouts in the US market. During its six-year run, you could spec a C7 A6 with the following engines:

A base model with the 2.0-liter engine was offered with front-wheel drive, but all engines were available with Quattro. In the United States, there were three transmission options offered:

  • 8 speed Tiptronic automatic
  • Multitronic CVT
  • 7 Speed S Tronic dual-clutch automatic

The engine and drivetrain options offered in the C7 A6 are shared with several other vehicles in the Volkswagen/Audi lineup. Many of the issues present on other models can be expected on the A6 as well.

A6 2.0t 

The 2.0t four-cylinder is a workhorse engine for the Volkswagen group. The C7 A6 used the 2.0t as the base engine.

2.0t engine a6

Timing chain tensioner

The early C7 A6 used the Gen 2 2.0 TSI engine, which suffered from timing chain tensioner failure. This issue can lead to catastrophic engine failure if the engine jumps timing.

Carbon Buildup

Carbon buildup is a common issue on direct-injected engines. Over time, carbon deposits build up on the intake valves and can cause issues like misfires and reduced fuel economy.

Coil packs

The 2.0-liter turbo engine goes through coil packs frequently. A bad coil pack will cause a misfire, as the spark plug is no longer igniting the air/fuel mixture in the combustion chamber.

A6 3.0 TFSI 

The 3.0 TFSI was the premium motor offered in the A6. A Roots supercharged V6, this engine makes great, responsive power. It’s the same engine Audi used in the high-performance S4, S5, and SQ5. Overall, this engine is reliable and relatively issue-free when compared to other Audi powerplants. There are still a few problems that can come upon these engines, especially as they get to be higher mileage.

3.0 supercharged v6

Coolant Leaks

Coolant leaks are common on the 3.0 TFSI. The coolant hoses under the intake and the intercoolers beneath the supercharger are common areas to see leaks.

Timing covers

Positioned on the rear of the engine, the upper timing covers can leak oil, particularly on older engines.

 Crank vent valve

The crank vent valve is positioned beneath the supercharger and works to prevent excessive pressure within the engine. The crank vent calve can becoming stuck open, resulting in excessive pressure, or become torn, leading to excessive blowby and a lean condition.


In general, the 3.0 TDI engine is robust and reliable. Most issues with this power plant pertain to the emissions system rather than the engine itself.

3.0 tdi engine

Bring your C7 A6 to Alex’s Autohaus

At Alex’s Autohaus, we have factory-trained technicians ready to work on your Audi. Our team is experienced with the entire Audi line, including the A6. Give us a call or schedule an appointment at our Midvale repair shop today!

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