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full bulletin at NHTSA ↗2019 Audi A6 electrical problems
moderate Owners of the 2019 Audi A6 have filed 64 NHTSA complaints about the electrical at roughly $850 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See electrical across all vehicles →
Complaints
64
Recalls
0
Avg fix
$850
| Model year | electrical complaints |
|---|---|
| 2015 A6 | 3 |
| 2016 A6 | 5 |
| 2019 A6 (this page) | 64 |
| 2020 A6 | 15 |
| 2021 A6 | 7 |
1crash
1injury
When does it fail?
Of the 64 electrical complaints filed for the 2019 Audi A6, 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
Of the 9 model years of Audi A6 we track for electrical problems, this one carries the most owner complaints on file — 64.
Electrical accounts for 57% of every owner complaint on file for this vehicle — the dominant problem area across 4 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical 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 informationwhen noises/vibration are detected from front of vehicle in dynamic mode.
full bulletin at NHTSA ↗This bulletin provides information when there are noises from the area around the instrument cluster.
full bulletin at NHTSA ↗This bulletin provides information when there are pixel faults on the virtual cockpit.
full bulletin at NHTSA ↗This bulletin provides informaiotn when the starter battery is discharged or defective.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The dominant complaint across these 63 narratives is starter generator (also called belt starter generator or alternator) failure in the 2019 Audi A6's 48V mild hybrid system. Owners describe a cascade of electrical warnings culminating in total power loss while driving—often on interstates or busy roads with nowhere safe to pull over.
The typical sequence: yellow "electrical system malfunction" warning (sometimes recurring after restart), then rapid escalation. Within minutes to an hour, owners lose power steering, transmission function, braking assist, lane-keeping and adaptive cruise control, and all display screens go black. The engine stalls and won't restart. Some vehicles become stuck in Park and cannot shift to Neutral even manually, making them impossible to move off the road without a tow truck.
A handful of owners also reported preceding electrical glitches—scrambled infotainment screens, battery charging issues, fuel gauge errors, door locks trapping occupants—weeks before the catastrophic failure.
The real problem: dealerships universally confirm the diagnosis but have no parts. Backorders stretch to 2–6+ months, with service centers reporting 11 to 60+ vehicles queued for the same repair at single locations. Audi issued Campaign 22V155000 and Service Action 27BQ, but no recall. No upgraded part exists. Owners stuck waiting lose warranty coverage, incur towing costs (some over $700), and go weeks or months without their vehicles, with minimal support from Audi.
Same Audi A6 electrical reports on nearby years: 2020
Failure modes owners describe
Starter generator / alternator failure with cascading electrical shutdown
The 48V starter generator (also called belt starter generator or alternator) fails, causing progressive loss of electrical function. Typically begins with yellow 'electrical system malfunction' warnings, escalates to red warnings, and cascades into loss of secondary systems (power steering, transmission, braking assist, lane-keeping assist, adaptive cruise control, crash sensors, display screens) before complete engine shutdown. Many owners report this happens on highways or busy roads with minimal warning time to pull over safely.
When: Mileage ranges from under 200 miles to 42,000+ miles. Failures occur unpredictably; some preceded by days/weeks of warning light cycling; others strike suddenly during driving.
Symptoms owners cite: Yellow 'electrical system malfunction' warning, often cycling on/off after restart; Red 'electrical system malfunction' warning with instruction to pull over safely; Start/Stop system malfunction alerts; Power steering failure or stiff steering; Transmission failure warnings and transmission inoperable messages; Braking system loss or reduced braking power; Adaptive cruise control, lane-keeping assist, lane-departure warning failures; Crash sensor / frontal collision avoidance system inoperability; Display screens (instrument cluster, infotainment) flashing, scrambled, or going completely black; Loss of hazard lights and other exterior lighting; Engine shaking or vibration before shutdown; Complete engine stall with no restart capability; Vehicle stuck in Park with inability to shift to Neutral; Temporary door lock malfunction
Codes mentioned: Starter Generator C29 / Part 4N0-903-028-P, 48V generator/alternator failure, Service Action Code 27BQ (per Audi documentation)
Repairs/costs cited: Replacement of starter generator/alternator required. Owners report dealerships have parts on severe backorder (2–6+ months), with costs ranging from $2,900–$4,000 under warranty. Many dealers have multiple vehicles awaiting this part (11–60+ units reported at single dealerships). One owner paid $2,902.12 out-of-pocket; warranty may expire during the repair wait. No upgraded replacement part available; dealers install the same part that has failed.
Recalls/TSBs owners mention: NHTSA Campaign 22V155000 (Electrical System) issued, but parts remain unavailable months after campaign notification. Audi Service Action Code 27BQ documented as of 4/30/2024 for Start/Stop system malfunction, but not widely communicated to owners until October 2024. No recall issued. No loaner vehicles or rental reimbursement offered by Audi in most cases. Audi has stated it cannot reimburse towing and repair wait expenses. Dealer service teams confirm this is a widespread, manufacturer-acknowledged problem affecting 2019+ Audi A6, A7, A8, Q5, Q7, Q8 models (particularly V6 engines).
Secondary electrical issues preceding or accompanying generator failure
Some owners experienced auxiliary electrical malfunctions in the weeks or months before full generator failure, including display screen hardware faults, battery charging issues, fuel gauge inaccuracy, and door lock intermittent failures. These may indicate degradation of the mild hybrid 48V electrical system or precursor faults.
When: Days to weeks before catastrophic failure; one case reported door lock issues 'at least 2 times in last month.'
Symptoms owners cite: Infotainment display screen hardware faults (top screen scrambled/black on startup, recovering after driving); Fuel gauge not working as designed (inaccurate fuel level indicator); Door lock malfunction (locked inside vehicle, unable to exit without manual intervention); Battery charge state unclear or battery load issues; Engine stalling at traffic lights despite start/stop being disabled
Codes mentioned: Display hardware issue (control module)
Repairs/costs cited: Dealerships typically replaced display hardware; door lock issues not yet resolved in reported case. Battery load tests and software updates (MMI, transmission wiring harness service, start/stop service) performed at some dealers without resolving underlying generator failure.
Recalls/TSBs owners mention: Software updates and wiring harness work performed via multiple dealership service visits, but root cause (failing starter generator) not diagnosed until catastrophic failure. No proactive replacement offered despite Service Action 27BQ.
Synthesized from 64 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 14 most recent
The car gave me a written error message on the dashboard that there was an electrical system malfunction. I thought to myself, "Gotta get that checked out. Let's see if it goes away." I drove a short distance home and parked. The next day I began to drive to work. I got the electrical system malfunction message again. I decided to pull into a parking lot and make an appointment to get it fixed…
A yellow warning light went on stating"electrical system malfunction" start/stop is not working. Within 5 miles a red warning light went on that stated pull over when safe then within 100 yds multiple warnings went off and i lost power steering, power brakes etc. I was able to get stopped but the car would not start nor was I able to even put it in neutral to have it towed. I researched the…
Warning appeared for electrical malfunction contact dealer. Within 15 minutes of driving to the dealer, electrical failure please pull over appeared. My antilock breaks, transmission, and finally the entire electric panel failed. The car entirely stopped while in traffic. I was unable to even turn on hazard lights. It would not turn back on. It required towing to audi dealership. I have…
The contact owns a 2019 Audi A6. The contact received notification of NHTSA Campaign Number: 22V155000 (Electrical System) however, the part to do the recall repair was not yet available. The contact stated that the fuel gauge was not working as designed. The vehicle was taken to the dealer where it was diagnosed but no cause for the failure was found. The vehicle was not repaired. The contact…
Component Failed: Believed to be Starter Generator Part number 4N0-903-028-P on 11/04/2022 Cause: Ended up stranded on the side of the highway at night with no power, to include power steering and hazard flashers. Car had to be pushed out of the high way to avoid being hit by traffic. Problem is ongoing and easily reproducible. Manufacturer confirmed faulty Starter Generator on 12/15/2022 From…
The electrical system malfunctioned driving on the busy 422 expressway. Going at 55mph. Car dash lights up warning signs like electrical system failure, transmission, brake, power steering failure and the car shuts down in the middle of the road. Steered it to the side of road. Car would not start. Had to get it towed to dealer, Car has 33000 miles. The dealer has confirmed the failure. The…
Electrical fault dash warnings (steering, transmission, braking and many other things too numerous to mention came on while driving the car and it went into limp mode and forced the car to stop and would not restart. The car had to be towed to the dealership where they diagnosed the problem to be the "alternator" which is more accurately what is known as the "belt starter generator" BSG. The…
A warning message appeared that there is an electrical system problem. I arranged to bring to dealer for service the next day. While driving to dealer, multiple malfunction messages appeared on dashboard. Eventually all displays went black and shortly thereafter the engine stopped. I rolled to a stop. Car was dead. Audi stated it needs a replacement starter/generator. Very dangerous as it…
While driving on an interstate highway, an electrical fault warning appeared. 5 minutes later, a series of warnings appeared pertaining to a whole host of Audi systems, and I suddenly lost power to the car. I coasted off the highway to the shoulder, where the car died. I was told by the dealership that the issue is a generator, and that it's a common issue affecting A6s. It was truly…
The electrical system failed while driving at highway speeds on the interstate. Car lost power, all safety systems shutdown and I had to navigate the car while coasting off the road. Car would no longer start and left me stranded on the side of the interstate for 2hrs. I have since learned from the audi service department that the 48V generator had failed and caused this situation.
Had electrical trouble with your 2019 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 electrical problem on the 2019 Audi A6?
It's a documented issue but not catastrophic. 64 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Based on the 64 complaints filed, electrical issues most often appear around 27,757 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 $850 for electrical 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 electrical?
No active recalls currently cover electrical 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/2019/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.