What are the reasons for insufficient coolant in the Audi A4?

[JesseDella]

Audi A4 coolant insufficiency may be caused by: insufficient coolant, damage to the auxiliary water tank, poor contact of wiring connectors, etc. The car radiator, also known as the heat exchanger, is part of the vehicle's cooling system. Its main function is to dissipate heat, keeping the engine operating temperature within the normal range. Taking the 2021 Audi A4 as an example, it belongs to the mid-size sedan category with body dimensions of 4762mm in length, 1847mm in width, and 1436mm in height, a wheelbase of 2825mm, a fuel tank capacity of 54 liters, and a curb weight of 1665kg. This model is equipped with a 2.0T turbocharged engine delivering a maximum horsepower of 204PS, maximum power of 150kW, and maximum torque of 320Nm, paired with a 7-speed dual-clutch transmission.