2022 Audi E-Tron Brakes Problems

The vehicle is experiencing an intermittent but active 'Electrical system: malfunction!' safety alert on the dashboard and myAudi app, caused by an internal high-voltage battery cell circuit fault (Diagnostic Trouble Code P0DB400 / U04A300) and a failure in the battery thermal runaway detection system. When the fault occurs, the vehicle suffers a complete loss of regenerative braking, severely affecting stopping predictability and vehicle handling. An authorized Audi dealership (Audi West Chester) confirmed the internal module failure under TAC Case NF-1675032 and directed a full battery module replacement. Diagnostic scans have confirmed two highly critical manufacturer trouble codes: P0DB400 (Hybrid/EV Battery Cell Balancing Circuit "C") and U04A300 (Invalid Data Received From Hybrid/EV Battery Interface Control Module "C"). However, a second dealership (Audi Cherry Hill) is refusing to honor the High-Voltage Battery Warranty or perform the necessary repairs because the safety code is currently showing as 'static' during their stationary test. Leaving an active high-voltage balancing and thermal tracking defect unaddressed poses an immediate risk of a sudden vehicle shutdown while driving or a potential thermal event.

NHTSA ID

11761584

Incident

Jul 29, 2026

Brakes were replaced by Audi with genuine Audi parts and within 2 months, the brake rotors became warped, requiring a resurfacing. After driving another 2 months, they once again became warped, making the entire car lurch and shake during braking.

NHTSA ID

11735621

Incident

Apr 1, 2026

My drive motors keep failing (so far 3 times) and my emergency braking abruptly stops my vehicle when no true danger is present and I’m in complete control of my vehicle. Currently my vehicle has a constant shuddering while braking which doesn’t feel safe because it’s not braking properly. Audi regional and the dealership refuses to take ownership of the issue. Dealer has confirmed issue and replaced drive motors three times. Each time my braking system has gotten worse. The part was replaced each time under warranty but Audi has not confirmed that a fix has been found and corrected. This means it can occur again and abruptly which can absolutely be a safety hazard as it was each time it failed on me.

NHTSA ID

11728417

Incident

Mar 1, 2024

Brakes do not work when there is a precipitation. You need to press the brake 3 times before you can feel the brakes engage. This occurs anytime it rains or snows for the entire time we’ve owned the car and Audi refuses to acknowledge the complaint

NHTSA ID

11664097

Incident

May 30, 2025

The contact owns a 2022 Audi E-Tron. The contact stated while driving at an undisclosed speed, the rotors were pulsating and shaking. The contact stated while driving 65 MPH, unknown sensors engaged without an object or vehicle nearby. The contact had set the system to the lowest sensitivity. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed and determined that the front rotors were worn. The vehicle was repaired, but the failure recurred. The dealer informed the contact that the vehicle had not been driven properly and was a maintenance issue. The manufacturer was contacted and opened a case. The approximate failure mileage was 15,000.

NHTSA ID

11631434

Incident

Sep 22, 2023

Mileage

15,000 mi

On 1/18/23, I was driving my 2022 E-tron on a roadway that had no center lane markings. I had my seatbelt and cruise control on. I was traveling at 34mph straight on the right side of the roadway. Suddenly, and without warning, my car took control, drove off the road to the right, and crashed into a tree. I suffered severe injuries, including but not limited to, loss of consciousness, concussion with vertigo, vision problems, neck, back, left arm/hand, and left leg injuries. I continue to suffer from my injuries to this day.

NHTSA ID

11603401

Incident

Jan 18, 2023

On 3 separate occasions brake pedal went all the way to the floor without stopping the vehicle. Pumping the brake pedal did not help as brake pedal went to the floor each time. After a few panic pumps all of sudden brakes worked as if nothing had happen. This was not a gradual regain of pedal force but full force as if nothing had happen. Did not see any indications on dashboard at the time and none were present after any of the events listed below. Note - Each event was after car sat in parking lot for at least 4 hours. First time was Jan 23, 2023 at ~ 12,300 miles leaving parking in the morning onto main road. Fortunately no traffic. Second event Feb 8 ~12,900 miles leaving parking lot onto main road in the morning. Fortunately no traffic. Third event Feb 9 ~ 12,940 miles leaving business parking lot in the afternoon and was approaching the exiting gate which rose out of the way in time for car not to hit the barrier. Car was taken to Audi Service on Feb 13, 2023 to be evaluated. Audi Service could not duplicate issue and kept the car for 11 days. Audi technical team advised replacing the brake booster module (PN 4KE-614-100-AG-BEF) which was done by Audi Service in South Burlington, VT. Original Brake Booster removed from car was kept at Audi Service.

NHTSA ID

11510001

Incident

Jan 23, 2023

1. The brakes all of a sudden failed. We were at an elementary school in carpool line - near children- the brake pedal did not work at all, nothing. Warning message to stop driving brake failure. The Audi-Sense alert did at least put on the emergency parking brake before hitting a car ahead of us. Turned off and on, checking if computer vs actual brake issue (see below, computer issues as well). The car lurched forward, then warning, got out of line onto side of parking lot. After turning off and on again, it worked to drive again. Unclear right now if brakes actually gone but European recall Sept 2021 suggests this is really a brake issue and recall exactly as described here (I bought this car three months later, which suggests gross negligence on part of Audi here). 2. Tire sensors do not work, wrong readings on pressure. Safety issue. Similar e-tron recalled, but not mine - again, Audi negligence not properly recalling all impacted vehicles. 3. Additional computer errors. The screen goes black when in use and cannot be accessed while driving. Not a safety issue, but controls and visibility are lost. As I can only list 3 problems here will open a second issue for remaining failures on this 9 month old vehicle. Thank you, this model should not be sold in US. Unsafe.

NHTSA ID

11485438

Incident

Sep 14, 2022