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Old 6th March 2016, 11:13   #106
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Default Re: Frontal Crash - Airbags didn't deploy. Why?

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Originally Posted by vin_b View Post
Moderators please move this reply to appropriate thread if it doesn't fit here.

I happened to visit VW Mysore for my annual service and came across a curious case of airbag deployment. I saw a perfectly fine new Vento from the side near the body shop area but only to notice that the airbags was deployed. I assumed that the engineers might be testing out something and approached the vehicle just out of curiosity. When I had a talk with the mechanic, he said its accident vehicle and hence it was deployed.

Upon seeing the front bumper, I was shocked to say the least. The bumper was in intact with minor cracks in the front

Have a look the pictures which I took (sorry for the clarity). It looks more like a faulty airbag sensor than anything else to me. As per mechanic, the owner apparently is going for insurance claim and was so irritated that he went to extent of saying that he does not need airbags if its soo sensitive. Shouldn't this be covered under warranty for faulty sensor than blindly claiming insurance. Shouldn't VW be looking at this more seriously since such low speed impact can happen to anyone in bumper to bumper traffic
It is hard to draw conclusions without knowing the full picture. It could have been a collision with a relatively soft object such as an animal. Airbag deployment is dependent on so many variables. There will always be around 10% incidents where airbags malfunction; either they don't deploy or end up deploying when not needed. It is theoretically possible to have the deceleration required to trigger the sensors without damaging the front end too much if the car collided with a softer object at a low speed. The speed might have been just high enough to trigger deployment but not enough to cause extensive damage. Aproximately 20 kmph would be my guess.

Last edited by Lobogris : 6th March 2016 at 11:17.
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Old 17th May 2016, 20:58   #107
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Default Re: Frontal Crash - Airbags didn't deploy. Why?

Some relevant pages on when the airbags Do & Don't deploy - from the Maruti Celerio owner's manual:

Frontal Crash - Airbags didn't deploy. Why?-dsc02023.jpg

Frontal Crash - Airbags didn't deploy. Why?-dsc02024.jpg

Frontal Crash - Airbags didn't deploy. Why?-dsc02025.jpg
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Old 17th May 2016, 21:47   #108
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Default Re: Frontal Crash - Airbags didn't deploy. Why?

The little car seeing "stars" on impact in the Celerio handbook is quite funny!

Last edited by smartcat : 17th May 2016 at 21:49.
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Old 21st June 2017, 13:37   #109
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Default Re: Frontal Crash - Airbags didn't deploy. Why?

Rohan Hoble shares his experience. He's curious to know why the airbags didn't deploy?! Whatever the technical reasons, this is an accident where airbags could potentially prevent a fatality.

Link to the Fortuner Thread (Toyota to pay 25 lakhs for Fortuner Accident (airbags didn't deploy))

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Car met with an accident on 07 May 2017. Incident happened late night in Goa. The car banged two trees and flipped 3 times in the field. Luckily nothing happened to me.

The car was totally damaged from all sides and not a single air bag was activated.

Vehicle is under total loss as repair estimate is 9.32 lakhs.
Frontal Crash - Airbags didn't deploy. Why?-picsart_062010.57.51.jpg
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Old 21st June 2017, 15:08   #110
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Default Re: Frontal Crash - Airbags didn't deploy. Why?

Quote:
Originally Posted by GTO View Post
Rohan Hoble shares his experience. He's curious to know why the airbags didn't deploy?! Whatever the technical reasons, this is an accident where airbags could potentially prevent a fatality.

Link to the Fortuner Thread (Toyota to pay 25 lakhs for Fortuner Accident (airbags didn't deploy))



Attachment 1650015
What I can see from the snaps is that the main impact appears to be on the centre of front bumper. Thereafter the car would have toppled or maybe there are some other sequence of events. But one thing looks for sure is that the Airbag impact sensors have not been activated mostly due to hit at centre of bumper. This Innova I reckon came with only front airbags. So in case of rollover, there is no question of airbags inflating. These snaps are from Owner's Manual of Brezza, mostly same in all Maruti cars.
Attached Thumbnails
Frontal Crash - Airbags didn't deploy. Why?-screenshot_20170621150045.png  

Frontal Crash - Airbags didn't deploy. Why?-screenshot_20170621150053.png  

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Old 21st June 2017, 15:38   #111
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Default Re: Frontal Crash - Airbags didn't deploy. Why?

Quote:
Originally Posted by GTO View Post
Rohan Hoble shares his experience. He's curious to know why the airbags didn't deploy?! Whatever the technical reasons, this is an accident where airbags could potentially prevent a fatality.

Link to the Fortuner Thread (Toyota to pay 25 lakhs for Fortuner Accident (airbags didn't deploy))



Attachment 1650015
IMHO, the frontal impact seems to have not gone beyond the bumper cross member and radiator cross member and the engine bay looks pretty much in good shape. This should be due to hitting a low height obstacle like a milestone or a small rock. The upper radiator member looks intact, which indicates that the tree didnt hit the center of the vehicle.

If the car has flipped, it will be mostly due to impact on one side, which I suspect is the drivers side. They have not shared pictures of the panels on the driver side. The rest of the damage is mainly caused due to the roll over and possibly the passenger side wheels have run over an obstacle which has flipped the car to the right. Hence, the primary impact does not look like it had to trigger airbags, like how the manual of the Brezza has mentioned.

Why I say that the car has flipped to the right side is that the right A pillar is deformed, and the left A Pillar only is dented. The first flip will have the highest energy and the drivers side has hit the ground first, followed by the passenger side. Unless the entire car is picturised, its difficult to analyse beyond this.
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Old 21st September 2017, 16:44   #112
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Default Re: Frontal Crash - Airbags didn't deploy. Why?

Sudarshan S shares his story:

Quote:
I bought a new Hyundai Elite i20 Asta (O) model on 01/09/2017 from Sukrith Hyundai, Madurai, Tamil Nadu bearing Registration No. TN58AP8488. On 10/09/2017, I met with a head-on collision with a Honda City which was travelling in the opposite lane on the National highway. It jumped on the wrong side due to a tyre burst and lost control, which resulted in this head on collision.

The Elite I20 was severely hit on the front side, but none of the Airbags deployed at the time of impact (despite wearing seat belts).
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Old 21st September 2017, 20:55   #113
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Default Re: Frontal Crash - Airbags didn't deploy. Why?

Going through all these incidents, I have one question: Why don't car manufacturers include more collision sensors? Why is it that only collisions that trigger specific sensors located at specific positions are used in cars? Or is it that companies fool people by not giving enough sensors instead?

It seems truly weird that we have great Accelerometers in our smartphones but we still don't have enough of them in cars to trigger airbag deployment. In fact, a sudden deceleration beyond what's possible using brakes should trigger deployment of atleast the driver airbag. It appears that car makers haven't progressed much in the three decades since the airbag was invented. Or at least, the products they provide to the mass market makes me think so.
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