An excellent automobile water pump needs the following key conditions:

1. High-efficiency performance: An excellent automobile water pump should have high-efficiency pump performance, which can provide enough water flow and pressure to ensure the normal operation of the engine cooling system and prevent the engine from overheating.

2. Durability: The water pump needs to adopt high-quality materials and precise manufacturing technology to ensure that it has good durability and stability, and can run stably for a long time without being easily damaged.

3. Low noise: An excellent water pump should be designed in a low-noise working state to reduce the noise and vibration when the engine is running and improve the driving comfort.

4. Good sealing performance: the water pump needs to have good sealing performance to ensure that the joint between the water pump and other system components will not leak and prevent the coolant from leaking.

5. Fast response: An excellent water pump should have a fast response speed, be able to start quickly and provide enough water flow to maintain the stable operation of the engine cooling system.

6. Strong adaptability: the water pump should be able to adapt to the requirements under different working conditions, including high temperature, high pressure and other environmental conditions, to ensure that it can work normally under various conditions.

7. Safety: The water pump needs to have safety performance, which can maintain stability at high speed and avoid engine overheating or other safety hazards caused by failure.

To sum up, an excellent automobile water pump needs to have key conditions such as high efficiency, durability, low noise, good sealing performance, quick response, strong adaptability and safety to ensure the normal operation of the engine cooling system and the safety performance of the vehicle.