A gearbox oil pipe may have been incorrectly welded, which can result in a transmission oil leakage.

https://www.productsafety.gov.au/recall/audi-australia-pty-ltd-audi-q7-4m-my2020-2021-and-q8-f1-my2019-2021?fbclid=IwAR3uL4my9Yq_7S1Br15m8vCGj8ooGrdZRUyhg9-d2fctTqmVKSm8zKiCRuk