How many drainage holes does the sunroof of the BMW 3 Series have?

[MacAllison]

The sunroof of the BMW 3 Series has four drainage holes. Pay attention to the waterproofing of the sunroof: The sealing of the sunroof is done with rubber seals. During use, it is important to keep the seals free of dust, especially in winter or after long-distance travel. Regularly clean them with a duster. Additionally, never attempt to open the sunroof when it is frozen, as this can damage the sunroof motor. In seasons with heavy sand or dust, clean the seals with a sponge every two months. Operating the electric sunroof: Avoid fully opening the sunroof on bumpy roads, as excessive vibration between the sunroof and the sliding rails can cause deformation of related components or even damage the motor. During car washing: Avoid directing high-pressure water jets directly at the seals. This can not only deform the seals under pressure, leading to water leakage into the car, but also significantly damage the seals.