Certain 2019-2021 Audi Q8 and 2020-2021 Audi Q7 vehicle owners could experience an engine stall due to a problem affecting the fuel pump installed in their vehicle.
In May 2020, Volkswagen began an investigation into the fuel delivery systems in certain Q7 and Q8 vehicles, after receiving reports of increased warranty claims that required replacement of the fuel pump. Volkswagen, along with the fuel pump supplier, launched an investigation into the problem. They analyzed the failed fuel pumps from the field, but were unable to reporoduce the problem. At that point, it appeared that the condition was present in the fuel delivery module. They started working on developing an improved fuel delivery module and continued to monitor the field situation. During the ongoing field monitoring, pressure pulsations in the low-pressure system were also found to be a factor. An evaluation regarding a potential software solution to adapt the idle speed in order to reduce the pressure pulsations was developed.
Even though not all influential factors of the failure pattern have been fully understood, the Audi Product Safety Committee decided to initiate a safety recall for Audi Q7 and Audi Q8 vehicles. Due to discussions with the EPA/CARB and the thresholds for emission defect reporting, the conditions for the warranty extension were extended to full useful life (15 years / 150,000 miles).
According to the defect report, a component of the fuel delivery module inside the fuel tank may break while operating the vehicle. The fragments can damage the sealing membrane in the pressure regulator and may lead to a failure of the fuel delivery module. An inoperative fuel pump under these conditions could result in illumination of "the emission control system" warning light, rough engine running and/or an engine no start. In rare instances, the engine could unexpectedly stall while driving, increasing the risk of a crash.
Between 2019 and July 13, 2022 Audi of America has received 74 warranty claims for Q7 PI and Q8 vehicles alleging a loss of motive power while driving due to this issue. Additionally, Audi of America has identified eight (8) field reports for Q7 PI and Q8 vehicles potentially relating to this issue.
Those receiving notices will be asked to return to their dealer to have the fuel pump replaced. Audi's number for this recall is 20DR and the NHTSA campaign number is 22V-516.