Why did the sunroof of my car shatter without warning?

Have you come across many cases of sunroofs shattering for no apparent reason whilst driving? This happened to my 2015 Renault Megane recently. The roof was closed at the time and I was travelling at 50mph - not a hot day. Now faced with bill to replace. Renault not interested in contributing.

Asked on 17 July 2017 by Philip Robinson

Answered by Honest John
A few times, yes. Happened to me twice. It seems to be 'without warning' but it's actually because a stress fracture has set up unnoticed that weakens the glass, then, because it's actually a structural part of the car, running over a speed hump or pothole or anything that flexes the body then shatters the sunroof.
Similar questions
Front sunroof sticks when closed and opens like a rocket when it decides to open. Rear sunroof works perfectly.
Some time ago you gave me advice on how to get the council to see to dangerous potholes. I believe you gave me a link but somehow I seem to have lost it. Can you help again please?
I saw your reply to SJ about damage to his car from a pothole. What we don’t know is how long it had been there. Councils will always hide behind weasel words such "as acted as promptly as possible". What...
Related models
Soft riding, yet fine handling hatchback with superb steering. Improved for 2012 with new 1.2 TCe 115 petrol engine.

 

Value my car