Sounds like he means the active safety roll hoop device that is
triggered during a crash on convertible E36s. I don't think it is
something that can be DIYed, it will need replacing with new charge
cartridges, as with airbags that have fired. A trip to the BMW dealer
is required. Not sure how severe the impact needs to be for the roll
hoop to trigger, but I would have the car inspected for straightness
while you're there. There could be damage to suspension parts or worse.
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