Audi S5 door lock actuator and water leak requiring tank, thermostat, and several hoses replacement on Audi S5

Some Audi S5 owners report experiencing issues with door lock actuators, which can lead to problems with locking and unlocking doors. These issues may manifest as a passenger door that fails to lock using any method, indicating a potentially faulty actuator that requires replacement. Additionally, some owners encounter water leak problems, often stemming from cracked water pumps and thermostat housings made of plastic that become brittle over time. To resolve these water leak issues, it may be necessary for owners to replace the water pump, thermostat housing, and associated pipes and fittings. Regular maintenance and prompt repairs are essential to keep the Audi S5 in good condition and to prevent further complications.