Audi wants to cut costs by 15 billion euros ($17.02 billion) by 2022, Germany's Manager Magazin business monthly reported on Thursday, citing company executives.
The cost cuts would help finance projects such as a shift to electromobility at Audi, the magazine said.
Audi said cost savings have not yet been finalized, but the scale of the cost cuts reported by the magazine was correct.
Future job vacancies will not be refilled, Manager Magazin said, citing finance chief Alexander Seitz, adding this would result in a 3 percent decrease in Audi's staff per year, or around 14,000 jobs in five years.
"We reject those numbers," Audi said.
Audi's management is in talks with labor representatives as the company assesses how many workers it will need at its various sites in the future, a spokeswoman said.
Workers at Audi's plants in Ingolstadt and Neckarsulm in Germany still had union-negotiated job guarantees through 2025, the spokeswoman said.
Audi has nearly 91,700 employees around the world, of which around 61,500 are based in Germany.
Savings are particularly important for Audi and parent Volkswagen Group after an emissions scandal and associated fines. Audi also faces a big bill to make its combustion engines comply with new anti-pollution rules.