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Re: Leak near A pillar - Megane III 58 Plate
Holes in tubes normally occur due to degradation, chafing or excess pressure (force).
As the remainder of the tube looks in good condition, I think we can eliminate degradation from the possibilities.
Chafing would leave marks all around the opening, as it would wear a groove into the tube, rather than drill a hole, again - no sign of wear around the hole itself.
That really only leaves the possibility of something snagging and puncturing the tube.
I'm not saying it's been self-inflicted (by yourself), but it may've been the well-intentioned actions of a previous owner, or some cack-handed person conducting a service/investigating a blocked drain channel, that's created the weakness, which has ultimately developed into a rupture.
Neither of us would know for sure.
Might be worth checking the condition of the pipe in the other pillar, as it may be the case that if one pipe has this type of damage, the other one may well have been treated similarly.
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