This bulletin provides informaiton when the transmission warning message appears in the cluster; P074100 stored in the TCM.
full bulletin at NHTSA ↗2015 Audi A4 powertrain problems
moderate Owners of the 2015 Audi A4 have filed 6 NHTSA complaints about the powertrain at roughly $2,500 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See powertrain across all vehicles →
Complaints
6
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2011 A4 | 4 |
| 2013 A4 | 8 |
| 2014 A4 | 5 |
| 2015 A4 (this page) | 6 |
| 2017 A4 | 4 |
| 2018 A4 | 5 |
When does it fail?
Of the 6 powertrain complaints filed for the 2015 Audi A4, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 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 8 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 informaiton when there is a leak on the oil hole between the planetary and the transfer box.
full bulletin at NHTSA ↗The high-voltage batteries in electric vehicles are subject to various ageing effects which could lead to the energy content (energy density) being reduced. This reduction in the energy content, which is due to factors. Revised header. Added Model years
full bulletin at NHTSA ↗This bulletin provides additoinal information to assist in determining the energy content of lithium-ion high-voltage batteries.
full bulletin at NHTSA ↗This bulletin offers information about the basic information needed for technical requests for gaerbox complaints.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 3 most recent
I have noticed at times when the vehicle in put into reverse gear the vehicle intermittanly fails to move
S times now, the vehicle intermittanly fails to move when placed in gear, reverse or drive. Additionally, while underway, transmission "bucks" and in some instances, accelerates rapidly with miminal accleration at accelrator pedal. I have a video of the latest incident but am unable to upload it to your site.
The vehicle rolls forward while facing a downhill, after shifting into reverse.
Had powertrain trouble with your 2015 Audi A4?
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 2015 Audi A4?
It's a documented issue but not catastrophic. 6 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 6 complaints filed, powertrain issues most often appear around 13,875 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/2015/Audi/A4.
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.