[timbo1213]

Has anyone noticed this on their BMW's before? Bubbles have formed all over the rear window of my F30. I did not have any tinting or film put on the window... it was left normal/stock from the dealership. The bubbles are a lot more noticeable when the suns shines on the window. Anyone know what this can be from?

[kadify]

I believe that is the adhesive between the laminated layers of the window. No matter what you do you will always have this with a laminated window. It is usually only noticeable in certain lighting conditions which is why you can't see it from inside the car usually.

[timbo1213]

I have never seen this before on any other car I have owned. Doesn't seem like it is something that should happen... especially on a year old BMW in my opinion.

[Rick4345]

I believe there is a small degree of tinting of the glass to help keep the car cooler.

I'm not sure what causes this but I've seen it on all four of my BMWs

[MachinesWithSouls]

It's normal - it's the UV coating / slight tint that the glass contains. It's on every BMW I've ever seen.

[Wires]

Originally Posted by SoManyBlueCars

It's normal - it's the UV coating / slight tint that the glass contains. It's on every BMW I've ever seen.

+1 and a lot of other vehicles. Typically really noticeable when you use polarized sunglasses. You'll see the same thing on the moon roof glass.