Windscreen crack appears out of nowhere

[meveringham]

My wife and I got in the car this morning after it had sat in the driveway all night, and she immediately noticed a reasonably long v-shaped crack on the windscreen, up high and in the middle. My view of it was obscured totally by the rear view mirror. I realise this sounds unlikely but we were out driving out MG4 yesterday, both my wife and I drove, and the crack was not there.

I have cameras on the driveway and neither were set off, so I don't think anyone touched it. Has this happened to anyone else? I wonder if it is some kind of fault, as neither of us recall any kind of impact (stone, etc) striking the windscreen.

 

[webhiker]

From very recent experience I can testify that the smallest of pebble, hardly making any noise hitting the windscreen, can end creating a crack half a meter long.
The impact sound was so low that if I hand been talking or listing to music I would not have noticed it.
I couldn't see no damage until 200 km later. Also temp variations at night made it grow longer and longer.

 

[kiwi]

Yes! Twice, within one month of replacement. Only have the one image of the original crack:

 

[meveringham]

Yes! Twice, within one month of replacement. Only have the one image of the original crack:

View attachment 36438

What did you do? Did MG sort it out or was it just an insurance claim?

 

[kiwi]

Insurance replacement free of charge on my policy. Took three weeks from a new screen to come in from China.