4 Series Cabriolets

[STAR89colin]

I regret if this question has been already posed.

Over the last year, my 2014 428 convertible has developed significant leaks, a problem that has just arisen lately. Our technician has created a significant aperture at the bottom for drainage; nevertheless, is there a method to prevent this from recurring? I have cleaned the seals, but it seems to have no effect. Is it necessary to replace all the seals, or just a few? Water is accumulating on the rear passenger side. I need guidance since I intend to sell it for a more dog-friendly option; however, I will not sell it while it is leaking, as it would be unjust. Thank you.

[GoodBoyCar]

This issue seems to be rather prevalent and pertains to drainage. Drain tubes channel water from the roof and boot region, presumably extending through the side of the vehicle and out at the bottom. If they are obstructed, the water has no outlet. I also recall instances when the drainage pipes were built incorrectly, with the same consequence; so, this may be a prudent first focus for investigation. I am certain that a more thorough study of the topic will provide further comprehensive explanations.

[GoodBoyCar]

I have just discovered this, which is more beneficial.

[generic_user2]

Your amplifier is at risk; address the issue promptly and inspect your amplifier. There is plenty information available online on the necessary actions, mostly including drilling holes in the sills.

[jane_doe2023]

My F33 has undergone the sill modification; nonetheless, it is prudent to monitor this closely, since the nearside is far more prone to water accumulation. The first indication of drain blockage is when the rear windows are lowered and raised, returning damp. It is quite simple to verify, particularly during winter, without the need of crawling under the vehicle.