water in footwell, sills filled with foam?!

[Vladzillamx5]

water coming from sill holes and when i took off the chrome sill step i found that all the holes have foam sticking out of them?! both sides! thats hardly factory situation... i found that the water is coming from the foam on one of the sideholes in the sill near the ecu? also can anyone suggest anywhere for a sandblast and underseal? thanks guys

[Steve]

yoikes... you think the foam is retaining water? No, def not factory but I have heard of people doing it to stiffen the body a bit (not sure how well that works).
https://www.mx5nutz.com/forum/index.php ... &p=1165280

You can access larger holes to the sill from the rear wheel well (theres a rubber bung in it, might be behind a cover) and from behind the plastic seat belt tower cover.