This bulleitn procides informaiton when tehre is a transmission warning mssage in the instrument cluster; P074100 is stored in the TCM.
full bulletin at NHTSA ↗2012 Audi A6 powertrain problems
moderate 7 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Complaints
7
Recalls
0
Avg fix
$2,500
When does it fail?
Of the 7 powertrain complaints filed for the 2012 Audi A6, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
No new NHTSA powertrain complaint has been filed on this vehicle in over 10 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This bulletin provides information when there is a strong jolt after engine automatically starts in start-stop mode; vehicles with 0BK & 0BL Gearbox.
full bulletin at NHTSA ↗This bulletin offers information about the basic information needed for technical requests for gaerbox complaints.
full bulletin at NHTSA ↗This bulletin offers information about the basic information needed for technical requests for gaerbox complaints.
full bulletin at NHTSA ↗This bulletin provides information when there is a fault shown; Engine: start/stop system, and the start system is not working; mileage below 50 km/32 miles.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 2 most recent
O-ring failure in 2012 a6 3.0 caused the transmission to internally leak fluid causing the electonic system to go bad. All of the following lights came on when issue started. Check engine light, gearbox, MIL trac control, MIL epc, light airbag MIL hi-speed cooling fan MIL tire pressure warning light the transmission would not shift, major lack of power to engine. Parking brake would also activate…
I just had check engine light which aperantly is a bad mechatronic device. Thank god nothing bad happened during driving, however when I talked to Audi corporate and was told it was not acommon problem and they dont want to fix it. The car is 60k and always was taken care in dealership shops, on time. Used only 30 miles a day and always kept indorr both at my work and at home. When reading…
Had powertrain trouble with your 2012 Audi A6?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2012 Audi A6?
It's a documented issue but not catastrophic. 7 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Based on the 7 complaints filed, powertrain issues most often appear around 63,505 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2012/Audi/A6.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.