What is the electronic water pump failure in BMW X4?
1 Answers
Here are the symptoms of electronic water pump failure in BMW X4: 1. Unstable idle speed: Pump failure will increase the rotational resistance of the water pump. Since the pump is connected to the timing belt, the increased rotational resistance of the water pump directly affects the engine's rotation. The idle speed shows as fluctuating after starting, which is more noticeable in winter and may even cause stalling. 2. Noise: There will be noise from the engine area, which is a rotational friction sound similar to a 'grinding' noise. This sound can accelerate with changes in engine speed and load, and generally becomes more pronounced as the fault worsens.