Audi S6 Problems: 4th Generation (2013 to 2018) – Expert Tips

It’s common for a 4th gen Audi S6 to have problems like the ride height sensors failing. Learn the top 5 problems owners typically run into with the 4th generation S6, years 2013 to 2018.

Top 5 Problems with the 2013 to 2018 4th Generation Audi S6

1. Ride Height Sensors Failing

Symptoms of Bad Ride Height Sensors

• Light on the dash for a service suspension message code C1031F1
• Vehicle sags at the corner or on one side

Causes of Faulty Ride Height Sensors

The ride height sensors are located on each lower control arm. It has a connector and arm to move up and down with the suspension. Worn sensors can cause the vehicle to sag, like at the corners or from front to rear. The S6 sagging can also mean there’s an airbag problem at each wheel. There are two at the rear and two at the front. If it’s leaking air from damage like a hole, it can cause the car to sag at that end.

How to Fix Defective Ride Height Sensors

If you receive a service suspension message, scan the system with a scan tool to find out which sensor is at fault.

2. Turbocharger Failure

Symptoms of a Bad Turbo

• Sudden lack of engine power

Causes of a Failed Turbo

The turbocharger can fail from oil starvation. The oil feed lines and filters can clog up. This is commonly from a lack of oil changes.

How to Fix Problems with the Turbo in the 2013 to 2018 Audi S6

To prevent problems with the turbo, change the oil regularly at the recommended intervals.

3. Ignition Coil Failure

Symptoms of Bad Ignition Coils

• Check engine light flashing
• Engine misfire
• Rough running engine

Causes of Ignition Coil Failure

Since the 4th gen S6 has a V8 engine, there are four coils on each side.

How to Fix Ignition Coils

You’ll need to remove some other components to access the ignition coils. We recommend replacing the spark plugs at the same time.

4. Water Pump Failure

Symptoms of a Bad Water Pump

• Coolant leaking
• Low coolant level
• Low coolant light on the dash

Causes of a Bad Water Pump

If the water pump fails from use over time and is left unfixed, it can lead to an overheating engine.

How to Fix a Bad Water Pump

Generally, to replace the water pump on the 2013 to 2018 S4, you’ll need to put the car in service mode. You’ll need to take the front end of the vehicle and tip it forward or pull it off to access the pump.

5. Problems with the AC

Symptoms of Problems with the AC in the 2013 to 2018 Audi S4

Causes of AC Issues

It’s common for a dirty cabin air filter to cause problems with the air conditioning (AC) in the 4th gen Audi S4. Debris can get past the filter and into the evaporator core.

How to Fix Problems with the AC

To prevent problems with the AC, change the cabin air filter regularly.

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