Recalls: Audi C6 A6 Allroad quattro
Overview
Manufacturers, or importers, issue recalls for defects or faults which have the potential to cause injury. Generally, manufacturers will inform the original buyers if their vehicle is subject to a recall and of the steps required to remedy the defect or fault. Please note that the recalls below (if any) are for Australian-delivered vehicles only. Furthermore, the number of recalls should not be taken as an indication of a model’s reliability or its safety more generally.
Recalls: Audi C6 A6 Allroad quattro
Audi C6 A6 Allroad quattro: programming for airbag deployment
In June 2007, a recall was issued for Audi C6 A6 Allroad quattro vehicles due to inappropriate software programming of the airbag deployment trigger sensor in some vehicles – at worst, the deployment of the front airbags in the event of an accident could be delayed (PRA 2007/9313).
Audi C6 A6 Allroad quattro: tailgate may close unexpectedly
In October 2007, a recall was issued for Audi C6 A6 Allroad vehicles due to a condition in which the power-operated tailgate may close unexpectedly and abruptly, shortly after being opened using the power function – this posed a risk of injury to persons when loading or unloading the vehicle and could be remedied by a software update (PRA 2007/9542).
Audi C6 A6 Allroad quattro: Takata airbag recall
In December 2018, recall campaign 69R7 was issued for Audi C6 A6 Allroad quattro vehicles. These vehicles had Takata front passenger airbags and the propellant wafers in these airbags could absorb moisture over time. In the event of airbag deployment, excessive internal pressure could cause the metal inflator housing to rupture and metallic fragments could be projected through the airbag cushion towards vehicle occupants – these fragments posed a risk of serious injury and fatality. For the VINs of the recalled vehicles, please see PRA 2018/17210.
Problems and faults: Audi C6 A6 Allroad quattro
Overview
This section identifies potential problems, causes and fixes based on the experiences of owners and repairers, online sources and technical service bulletins. This information is provided solely for reference purposes and AustralianCar.Reviews recommends that only properly qualified persons carry out repairs or modifications. Furthermore, the number of items below should not be taken as an indicator of a model’s reliability or the frequency with which they may occur.
To report a problem or fault to the AustralianCar.Reviews team, please use the Contact Us form. Note that AustralianCar.Reviews does not offer advice on automotive problems or disputes; such enquiries will not receive a reply. For vehicles purchased from dealers after 1 January 2011, please see our Australian Consumer Law fact sheet.
Audi A6 Allroad diesel engine: NOx emissions “defeat device”
Audi C6 A6 Allroad vehicles powered by 3.0-litre diesel V6 engines (engine code: CDY) that were available for sale from 2009-11 have software in the electronic control module (ECM) that can sense – via sensors measuring the position of the steering wheel, vehicle speed, the duration of the engine’s operation and barometric pressure – when the vehicle is undergoing emissions testing. The ECM then operates in a low NOx “temperature conditioning” mode to satisfy emissions standards.
At exactly one second after the completion of the initial phases of the standard test procedure, the software immediately switches to a “normal mode” and changes a number of operating parameters that increased NOx emissions. In other tests where the vehicle did not experience driving conditions similar to the start of the emissions testing procedure, the emissions were higher from the start, consistent with the operation and existence of a “normal mode”.
The software on these vehicles constitutes a “defeat device” since it is an Auxiliary Emissions Control Device (AECD) designed to circumvent emissions testing. Volkswagen has admitted that all its 3.0-litre turbo-diesel engines from ‘model years’ 2009 through to 2016 have defeat devices.
Audi C6 A6 Allroad quattro: air conditioning doesn’t work
In April 2010, Audi issued technical service bulletin 2020124/2 for Audi C6 A6 Allroad quattro vehicles because the air conditioning (A/C) may stop working. According to the service bulletin, this may be caused by the A/C pressure/temperature sensor G395 leaking refrigerant – this would cause sensor G395 to show an incorrect or implausible value when reading MVBs (Measuring Value Blocks) such that the air conditioning compressor would deactivate; or,
An improved A/C pressure/temperature sensor G395 was introduced in series production (part no. 4F0 959 126C).
Problems and faults: Audi C6 A6 Allroad quattro
- The anti-lock braking system (ABS) may activate unnecessarily under normal to light braking pressure due to cracks in tone/exciter rings (rings on the outer CV shaft that measure wheel rotation).
- The coolant level warning light may illuminate in cold temperatures and then go off as the engine warms up – this may be due to a malfunctioning sensor in coolant reservoir.
- It may not be possible to remove the key from the ignition because the transmission selector fails to recognise that the transmission is in park – this requires replacement of the transmission shift selector.
- The remote central locking may sometimes not unlock the doors due to a problem with the door modules – this can be fixed by reprogramming the door modules.
- If the fuel gauge does not provide a full reading after re-fueling, the program for the instrument cluster may need to be updated.
- For some early models, the fuel door may not open because the release cable caused interference – the cable must be re-routed.
- The master power window switch may work intermittently due to interference with the trim.
