This TSB provides information when the gearbox warning light is on; event memory entry P0174A00/P174E00.
full bulletin at NHTSA ↗2018 Audi A3 powertrain problems
moderate Owners of the 2018 Audi A3 have filed 4 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
4
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2015 A3 | 8 |
| 2016 A3 | 9 |
| 2017 A3 | 6 |
| 2018 A3 (this page) | 4 |
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.
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 information when there is an oil leak near the transmission cooler.
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 provides information when there is a gearbox malfunction warning; DTC P0C2900 in the TCM.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 2 most recent
Transmission module! Started jerking when switching gears, to not switching gears at all and this happened while driving so I was on the road stalled with no gear changes! Car is inoperable, due to this and it’s still being paid for yet not able to be driven from practically the day I bought it! The manufacturer knows this is an issue and we are still out here in unsafe non gear changing cars!…
On February 19, 2022, I drove from my home in San Francisco to the Home Depot in Colma/Daly City. This is a 7 Mile drive one way on the freeway. When I was leaving the parking lot at the Home Depot, I put the car in reverse and all of a sudden it would not move. The car stopped. I turned the ignition off. Then on. There were NO warning lights. I put the car in reverse again, and now it was…
Had powertrain trouble with your 2018 Audi A3?
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 2018 Audi A3?
It's a documented issue but not catastrophic. 4 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?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
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/2018/Audi/A3.
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.