Newer car's seat belts w/explosive cartridges

[tibimakai]

A newer car's seat belts, that have the explosive cartridges can be used as a regular seat belt? I'm thinking about Mazda MX-5 NC seat belts.

[RichardSIA]

that have the explosive cartridges

WHAT!
Why would seat belts have explosive cartridges incorporated into them?
This make NO sense to me.

[tibimakai]

To pull the belt in case of an accident.

[JAMADOR]

that have the explosive cartridges

WHAT!
Why would seat belts have explosive cartridges incorporated into them?
This make NO sense to me.

Pre-tensioners. Rapid retraction to effectively harness you to the seat in the event of a crash & put you in a more suitable position to meet the airbag with your face.

[KB58]

that have the explosive cartridges

WHAT!
Why would seat belts have explosive cartridges incorporated into them?
This make NO sense to me.

It's not to break/cut them, it's to tighten an overly-loose belt before impact.

[RichardSIA]

Ah, an additional expense to "Solve" a "Problem" affecting 0.0008% of the population.
Now it makes perfect sense.

[rx7locost]

Ah, an additional expense to "Solve" a "Problem" affecting 0.0008% of the population.
Now it makes perfect sense.

Perhaps. I thank Subaru for having them. A week ago, my son and family were in an accident that totaled their 6 mo old Outback. Everyone came out with nothing more than a few bumps and bruises. The explosive seat belts did activate along with all of the airbags. I am sure that their survival was a direct result of the airbags and seatbelts doing their jobs. Metal is expendable. Flesh, less so.

[tibimakai]

Great to hear, that everybody got out OK.
But what do you think, these seatbelts could be used as a regular basic seatbelt, of course I would not connect that cartridge.

[rx7locost]

I am no expert. I seem to recall that these explosive seatbelts had a sewn in loop that the explosive charge breaks. My memory may be a decade or two old. or possibly just somebody's internet guessing. I would not put used belts in any form in a Locost build when so many other options are reasonably priced. Just my opinion.