The engine and transmission are all there, still plenty of power. Other than the water pump, I do know it will need an ABS sensor (not sure which one) and there is a minor leak from the power steering pump
2010 Audi A4 2.0T quattro Premium - AWD 2.0T quattro Premium 4dr Sedan 6M Moderate Demand Air Conditioning Power Windows Power Locks Power Steering Tilt Wheel AM/FM CD/MP3 Satellite AM/FM CD/DVD Immobilizer Keyless Entry Alarm Daytime Running Lights Dual Front Airbags Side Airbags Head Airbags Rear Head Airbags Active Seatbelts Power Sun/Moon Roof. Power Windows✔ Power Locks✔ AM/FM✔ Air Conditioning