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While driving, the car lost power, stalled, and rolled backwards down an incline.   Fortunately, the brakes worked allowing me to bring the car to a safe stop.  The dealer has been trying to repair the car for 40 days (the repair is not complete).   The repair included replacing the front motor.  When I went online to the Audi forums, it appears many drivers have experienced the same problem.   Some type of refrigerant leak causes a failure of the front electric motor which causes the car to lose drive power (stall).  I can't tell from the online forums how prevalent (or rare) this problem is, but it is clear that I am not the only Audi Q4 owner who has experienced the same sequence of events.

AUDI Q4 E-TRON SPORTBACK 2023 POWER TRAIN

Component/System failed: Brake Servo part number 1eb-614-106-t   Safety put at risk: Car was unable to move and completely locked up while in "Drive". If this had happened at a stop light or in traffic,  it would have dangerously obstructed traffic, as the car could not be put into neutral or any other gear and could not move. Tow truck with dollies was required to move vehicle. A flatbed could not be used since the wheels were all locked up.   The vehicle has been inspected by the dealer's service department at the Audi dealer.   This is a video of the warnings: [XXX]   While stopped, but still in Drive mode,  in a drive through lane of a fast food restaurant, the car's check engine light turned on, and the car shut off.  When the the car Start/Stop button was pressed to turn the car back on, many warning messages were displayed on the dash, and the car refused to shift into Drive, Neutral, or Reverse.  The service department at the dealer has had the car for over a month (Since [XXX]) , and is unable to get the needed parts from Germany.  INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

AUDI Q4 E-TRON SPORTBACK 2023 FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

The contact owns a 2023 Audi Q4 E-Tron. The contact stated that the vehicle could not be charged using the home charging station. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure. The contact later received a notification of NHTSA Campaign Number: 23V842000 (Electrical System) regarding the home power outlet and charging cable. The failure mileage was 8,000.

AUDI Q4 E-TRON SPORTBACK 2023 ELECTRICAL SYSTEM

The contact owns a 2023 Audi Q4 E-Tron. The contact received notification of NHTSA Campaign Number: 23V842000 (Electrical System) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that he had plugged the compact portable charging system into a 220/240V wall socket that licensed electricians had installed. The contact stated that after returning to the residence a short time later, there was a burning plastic odor inside the garage. The contact checked the charging cable and the wall socket and became aware that the socket was partially melted. The contact disconnected the portable charger from the wall socket. The contact stated that the 220/240V wall socket was no longer operable. The manufacturer was made aware of the issue. The failure mileage was approximately 1,500. VIN tool confirms parts not available.

the horn is at an extremely low volume/pitch. Can barely hear it especially for other drivers inside their vehicle. Someone almost crashed into me and I pressed the horn but it was barely audible.

2023 Audi Q4 e-tron Sportback — vehicle data sourced from FuelEconomy.gov.

The 2023 Audi Q4 e-tron Sportback is a certified electric SUV coupe offering an impressive 242 miles of electric range. With All-Wheel Drive and a combined MPG of 95, it delivers efficient performance for your daily commute and beyond.

Audi Q4 e-tron Sportback (2023) product.specifications