2021 Audi E-Tron Sportback electrical system problems

“- Vehicle was brought in operable condition to Audi service center for NHTSA recall numbers 25V900 and 26V240 on 06/18/26. - On 06/19/26, the Audi service center informed me after completing the 90TV software update (25V900) that every single light is on, on the dash and that they have to do a battery evaluation. - On 06/23/26, the Audi service center informed me a TAC ticket was created and they were waiting for a response. - On 06/30/26, the Audi service center informed me that they will have to replace a gateway control module after being informed by their TAC department while adding that the module is on backorder. - The vehicle as of today (09/17/26) is still at the Audi service center and unavailable to me, any inspection would need to be coordinated with them. - Audi’s safety recall notice states the work would take about half a day to complete. Including today (09/17/26) it has been 92 days since presentation of the vehicle, showing failure to repair the motor vehicle or replace equipment adequately within 60 days after its presentation under 49 U.S. Code § 30120. - Given the the repair has not been done adequately within a reasonable time, under 49…”

“2021 Audi e-tron, 44,749 miles. Right after a scheduled service at Audi [XXX] on XXX, I noticed a loud droning/humming noise from the drivetrain while driving. The noise tracks with vehicle speed - it gets louder and higher-pitched as the car goes faster. I called the dealership to report it as soon as I got the car back in late XXX. Nobody responded. The noise is still present today, roughly five months later, at about 48,000 miles. The symptom matches Audi's own technical service bulletin 2047920 (rev 7), which covers 2020-2025 Audi vehicles including the e-tron: a humming/booming noise while driving whose frequency rises with speed, caused by mechanical damage to the front wheel bearing. Multiple other e-tron owners report the same speed-correlated drone on owner forums, including a bearing failure inside the drive motor and a full rear drive unit failure. I am concerned that a failing drivetrain bearing could degrade suddenly at highway speed. Manufacturer response to date: my phone report right after the April 2026 service got no response. I raised the noise in writing to Audi of America on XXX (their reference XXX). Audi's XXX reply addressed only…”

“I own a 2021 Audi e-tron with approximately 58000 miles. Beginning in March 2026, the vehicle developed intermittent Virtual Cockpit/instrument-cluster problems with blank display. I reported the condition to Audi dealer of Princeton NJ. The vehicle subsequently experienced two dead 12-volt battery incidents and became inoperable. The second 12 volt battery was new. Following the most recent incident, the Audi dealer diagnosed the Virtual Cockpit/instrument cluster as causing a drain on the 12-volt battery and recommended replacement at a cost of approximately $3,500. The replacement part is unavailable, and Audi has provided no estimated delivery date. The vehicle has remained out of service since July 03rd 2026. This condition presents a potential safety concern because failure of the instrument cluster may prevent the driver from reliably viewing speed, warning indicators, vehicle status, range, and other safety-related information. The recurring 12-volt battery discharge may also leave the vehicle unexpectedly disabled. The vehicle is additionally showing an indicated range of only approximately 160 miles at 100% charge. Audi has not established whether…”

“While driving my 2021 Audi e-tron Sportback Prestige, the high-voltage battery warning light illuminated on the dashboard. At the same time, regenerative braking stopped functioning, resulting in reduced energy recovery and a noticeable decrease in driving range. Before taking the vehicle to an Audi dealership, I had the diagnostic trouble codes read by an independent repair shop. The technician advised me to take the vehicle to Audi because the diagnostic information reportedly indicated a potential high-voltage battery thermal runaway condition. I took the vehicle to an authorized Audi dealership. The dealer cleared the fault codes and returned the vehicle to me without replacing any high-voltage battery components or performing repairs. I was not advised that the vehicle was unsafe to drive. A few weeks later, the high-voltage battery warning light returned. I brought the vehicle back to the dealership, where I was informed that a high-voltage battery module had failed. The dealer has now recommended replacing the battery module at an estimated cost of approximately $12,000. I am concerned that the vehicle was returned to me after a reported high-voltage…”

“Moisture build-up in the high-voltage electrical system through a faulty seal on the charging socket, which can cause a short circuit and significantly increase the risk of a vehicle fire. If you get a warning light saying "electrical system: fault," you should stop driving immediately, park outdoors away from structures, and not charge the vehicle. Braking problems caused by sub-standard welding within the ABS rotor and shaft. High-voltage battery modules that may overheat, also increasing the risk of fire. An infotainment unit that can become internally damaged when the vehicle is shut off, resulting in an inoperative rearview camera display a federal safety standard violation. This clearly shows the vehicle was badly manufactured, during a chip shortage in 2020. This vehicle is a complete failure by Audi and puts so many innocent peoples lives at risk.”

“What component or system failed or malfunctioned, and is it available for inspection upon request? - While on highway the vehicle loosed all Power indicating Electrical Malfunction How was your safety or the safety of others put at risk? It happened on I-35 Freeway twice putting me in danger of 18 wheelers around me. I am afraid to be in the vehicle even if they return it to me. Based on records this issue has been present on the car since it rolled off manufacturing. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes and Dealer has reproduced it and has the car with them for 5 Plus months. Have replaced many components and are not able to resolve it. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? South Austin Audi Dealer has been working with Audi Corporate Technical team and have replaced 5 parts to no resolution. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Electrical Malfunction - Red light flashing to pull the care over to the emergency lane but there is no acceleration -…”