The biggest recall affects 342,867 Audi vehicles including the A4, A5 and A6 sedans and the Q5 SUV which use the 2.0-litre TFSI engine.
According to Audi, the electric coolant pumps of the turbocharged engines may get clogged with debris which in turn can lead to overheating and possibly a fire.
Audi will issue an update for the software controlling the coolant pumps of the SUV which will shut down the powers supply to the affected component if it gets blocked in by debris. The recall is set to start by February 20.
The second recall affects 234,054 units of the Q5 SUV which come equipped with sunroofs. Audi states that the damage to the drainage system for the panoramic sunroof that can allow water to drip into the foam surrounding the side head airbag inflation canister.
The water may cause the canister to corrode which in turn could cause the inflator to explode and send shrapnel flying out if the vehicle's airbags are deployed.
Audi will inspect the inflator canister and coat it or replace it as necessary while removing the foam enclosure. The recall is set to begin in February as well.