Two problems related to coolant leaking have been reported for the 2012 Audi A6. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Audi A6 based on all problems reported for the 2012 A6.
Collant valve leaked through wiring harness, allowing coolant to enter the engine control module. This led to a shorting of the module and caused a loss of all power and mobility. This event occurred while the car was in motion on a city street.
While driving on a Sunday, the car reported transmission issues but it stated we could continue driving. The following day, there were multiple systems failure warnings. This occurred at 54,000 miles and 49 months since purchase. The car began to lose power but was driven back to the dealership. After a lengthy period of time, the service manager reported that "coolant leak in valve n82, coolant migrated into harness and contaminated transmission control unit, causing no comm in pwrtrain can; tsb2033806/7. " this repair required replacement of major components and extensive labor costs. The total cost was $9606 and the dealer/Audi voluntarily paid $5391 of the costs.