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Audi · Known Issues

2025 Audi Q4 e-tron Problems: 3 Known Issues

2025 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 Audi Q4 e-tron has 3 documented known issues, with 2 rated critical. The most serious are 12V Auxiliary Battery Parasitic Drain Leaves Car Dead With a Full HV Pack ($250-$600 repair) and 2024-2025 Audi Q4 e-tron On-Board-Charger Recall 93FR / NHTSA 25V125. Across all issues with published estimates, repair costs range from $150 to $700. DIY maintenance guides at au7o.io.

In This Article

  • Q4 e-tron Electrical2
  • Q4 e-tron Brakes1
  • Recalls7
  • FAQ
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In This Article

  • Electrical2
  • Brakes1
  • Recalls7
  • FAQ

All 3 Known Issues

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ALL YEARS20262025202420232022

On the 2022-2026 Audi Q4 e-tron, the MEB platform keeps a conventional 12V battery alive to run the telematics module, gateway, door handle actuators, MMI and the contactors that connect the high-voltage pack. Owners report the Q4 e-tron going completely dark after sitting only a few days to a few weeks - flush door handles will not extend, the MMI will not boot, and the car cannot be woken even though the traction battery is near full. The DC-DC converter normally tops up the 12V, but it only does so while the car is awake; once the 12V falls below the wake threshold the vehicle cannot bootstrap itself back up. Precursor symptoms are often dismissed as software: 'Electrical system: malfunction' messages, long MMI boot times, and infotainment reboots while driving that disappear permanently once the 12V is replaced. This is distinct from the 2024-2025 on-board charger campaign - it affects cars with no open recall.

Common Symptoms

  • Car completely dead after sitting several days to weeks
  • Flush door handles will not extend; must use the emergency key blade
  • MMI will not boot or takes unusually long to start
  • 'Electrical system: malfunction' warning message
  • Intermittent infotainment reboots while driving
  • Vehicle will not wake or charge despite a full high-voltage battery

How to Fix

Jump or charge the 12V at the underhood terminals to regain access, then have the battery load-tested rather than assumed good. If replaced, the new battery must be coded/registered to the vehicle with a VAS or equivalent scan tool so the charging strategy matches its capacity and age; skipping registration causes premature failure of the replacement. Before spending on a battery, have the dealer check for open campaigns and current software - in some cases the root cause is charging logic or a failed DC-DC converter, not the battery. For cars that sit, a 12V trickle maintainer or driving/charging the car at least every one to two weeks prevents recurrence.

Typical repair cost:$250 - $600

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
Low ConfidenceVerifiedReviewed Aug 2026

On the 2024-2025 Audi Q4 e-tron, nHTSA campaign 25V125 / Audi 93FR covers certain 2024-2025 Q4 e-tron and Q4 e-tron Sportback vehicles. The on-board charger can fail and stop charging the 12-volt battery, which can lead to loss of drive power and increase crash risk. Eligibility is VIN-specific; this does not support the former universal sensor, relay, battery or software-glitch diagnosis.

This issue also affects: Porsche Taycan, Volkswagen ID.4, Audi A4

Common Symptoms

  • Electrical-system warning
  • 12-volt battery is no longer charged
  • Loss of drive power

How to Fix

Check the VIN and campaign-completion history with Audi or NHTSA. The free remedy replaces the on-board charger. If the vehicle warns of an electrical-system fault or loses drive power, move out of traffic safely and arrange Audi recovery/inspection; do not buy a 12-volt battery or generic electrical parts from this summary.

Research This Issue

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NHTSA Verified
High ConfidenceVerifiedReviewed Jul 2026

On the 2022-2025 Audi Q4 e-tron, audi fitted the Q4 e-tron with rear drum brakes rather than discs, specifically because regenerative braking does so much of the deceleration that rear friction brakes would otherwise rust. The drums help, but they do not eliminate the problem: moisture that gets past the drum seal cannot dry out, because the shoes almost never see enough heat to burn it off. Owners report a loud bang or scraping/grinding noise on the first few rotations after the car has been parked overnight in damp or cold conditions - the shoes have lightly bonded to the drum surface and break free as the car moves off. Left long enough the corrosion progresses to sticking shoes, dragging rear brakes and uneven wear. The same disuse mechanism produces visible external rust on the drums that alarms owners on low-mileage cars.

Common Symptoms

  • Loud bang or clunk from the rear on first movement after parking
  • Scraping or grinding noise from the rear brakes at low speed
  • Noise worst after damp, cold or overnight parking and clears after a few rotations
  • Visible rust on the rear brake drums at low mileage
  • Rear brakes dragging or uneven rear brake wear

How to Fix

Audi addressed the noise complaint with a service action installing an improved gasket that better seals the rear drum assembly against moisture ingress - ask the dealer to check for it by symptom, as it applies to earlier build cars. Where corrosion has already formed, the fix is to remove the drums, clean or replace the shoes and drums and re-seal. Owner-side prevention is the practical lever: deliberately use the friction brakes with several firm, moderate-speed stops every week or two (or select the lowest regen setting periodically) so the shoes heat-cycle and dry, and avoid parking with a wet drivetrain in an unventilated space. Surface rust on the outside of the drum is cosmetic and normal on a regen-heavy EV.

Typical repair cost:$150 - $700

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
Medium ConfidenceVerifiedReviewed Aug 2026
NHTSA Recalls7 recalls

SEAT BELTS:FRONT:RETRACTOR

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2025 GTI, Golf R, Audi A5, A6 Sportback E-Tron, S5, S6 Sportback E-Tron, 2026 Q4 Sportback E-Tron, and Q4 E-Tron vehicles. The torsion bar in one or both front seat belt retractors may have been damaged during production.

Campaign #25V63800024/09/2025

AIR BAGS

Volkswagen Group of America, Inc. (Audi) is recalling certain 2022-2023 Q4 E-Tron SUV and Q4 E-Tron Sportback vehicles. During deployment, the head curtain air bag could deform the door seal and expose the metal inlay within the seal, which could tear the air bag. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 226, "Ejection Mitigation."

Campaign #23V18900022/03/2023

ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:CABLE/CORD:ONBOARD

Volkswagen Group of America, Inc. (Audi) is recalling certain 2022-2024 RS e-tron GT, e-tron GT, Q4 e-tron Sportback, Q4 e-tron, 2020-2021 Audi A8, 2019-2024 e-tron Quattro, 2020-2024 e-tron Sportback Quattro, Q5, and 2021-2022 A7 vehicles. When using the industrial 220V/240V plug at the 100% charge setting, some home power outlets may be incapable of handling the electrical current required to utilize the compact charging system, causing the outlet or charging cable to overheat.

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Frequently Asked Questions

What are the most common Audi Q4 e-tron problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 Audi Q4 e-tron has 3 documented issues. The most frequently reported are: 12V Auxiliary Battery Parasitic Drain Leaves Car Dead With a Full HV Pack, 2024-2025 Audi Q4 e-tron On-Board-Charger Recall 93FR / NHTSA 25V125, Rear Drum Brake Shoes Corrode and Stick to the Drums After Parking (Regen-Related Disuse). Of these, 2 are rated critical and should be addressed promptly.

Is the Audi Q4 e-tron reliable?

The 2025 Audi Q4 e-tron has 3 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 2 issues are rated critical: 12V Auxiliary Battery Parasitic Drain Leaves Car Dead With a Full HV Pack and 2024-2025 Audi Q4 e-tron On-Board-Charger Recall 93FR / NHTSA 25V125. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Audi Q4 e-tron problems?

Repair costs for known Audi Q4 e-tron issues range from $150 to $700, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 12V Auxiliary Battery Parasitic Drain Leaves Car Dead With a Full HV Pack, typically costs $250-$600 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2022-2026 Audi Q4 e-tron 12V Auxiliary Battery Parasitic Drain Leaves Car Dead With a Full HV Pack?

The MEB platform keeps a conventional 12V battery alive to run the telematics module, gateway, door handle actuators, MMI and the contactors that connect the high-voltage pack. Owners report the Q4 e-tron going completely dark after sitting only a few days to a few weeks - flush… Repairs typically run $250-$600. Severity: high.

What is the 2024-2025 Audi Q4 e-tron 2024-2025 Audi Q4 e-tron On-Board-Charger Recall 93FR / NHTSA 25V125?

NHTSA campaign 25V125 / Audi 93FR covers certain 2024-2025 Q4 e-tron and Q4 e-tron Sportback vehicles. The on-board charger can fail and stop charging the 12-volt battery, which can lead to loss of drive power and increase crash risk. Eligibility is VIN-specific; this does not su… Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.

Campaign #23V84200013/12/2023

EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE

Volkswagen Group of America, Inc. (Audi) is recalling certain 2022-2024 Q4 E-TRON and Q4 E-TRON Sportback vehicles. The incorrect headlight control module software may have been installed. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."

Campaign #24V36100022/05/2024

POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL)

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2021-2023 ID.4, 2022-2023 Audi Q4 e-Tron, and Q4 e-Tron Sportback vehicles. The instrument panel may not properly display the transmission gear lever indicator. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 102, "Transmission Shift Lever Sequence, Starter Interlock, and Transmission Braking Effect."

Campaign #25V12000027/02/2025

+ 2 more recalls. Check all on NHTSA.gov

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

What is the 2022-2025 Audi Q4 e-tron Rear Drum Brake Shoes Corrode and Stick to the Drums After Parking (Regen-Related Disuse)?

Audi fitted the Q4 e-tron with rear drum brakes rather than discs, specifically because regenerative braking does so much of the deceleration that rear friction brakes would otherwise rust. The drums help, but they do not eliminate the problem: moisture that gets past the drum se… Repairs typically run $150-$700. Severity: medium.