The Bavarian giants have long been credited with an interest in the Germany international, with Sane's current deal at the Etihad set to expire in 2021.
The 24-year-old returned to action for the Manchester City Under-23 side in February after suffering a cruciate ligament injury last summer, and Bayern are supposedly preparing to step up their interest in the winger.
According to The Telegraph, the Bundesliga champions are willing to offer €65m (£56.8m) for Sane's services, but Bayern will reassess their situation when the transfer window reopens amid the coronavirus pandemic.
The report claims that City have affirmed that they will not accept Bayern's previous £35m valuation of the German, and Hansi Flick's side will have to fork out a substantial amount in order to secure a deal.
Sane has amassed 39 goals from 134 appearances across all competitions for Pep Guardiola's men since arriving from Schalke in 2016. body check tags ::