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Old 03-01-2012, 08:21 PM   #1
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Air Bag Compatible Bumpers

I'm looking for air-bag compatible bumpers. All I can find are ARB and AEV. Any others?

Also, I would like to know if anyone has experience with what it takes to activate the airbag. Example, if I am offroading and crush the sensor, and then reach the minimum speed to engage it, which I beleive is 45 mph, will that release the bag?

Thanks for any info you can help me with.

Joe

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Old 03-01-2012, 08:26 PM   #2
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Originally Posted by theluckyones612 View Post
I'm looking for air-bag compatible bumpers. All I can find are ARB and AEV. Any others?

Also, I would like to know if anyone has experience with what it takes to activate the airbag. Example, if I am offroading and crush the sensor, and then reach the minimum speed to engage it, which I beleive is 45 mph, will that release the bag?

Thanks for any info you can help me with.

Joe
The ARB and AEV bumpers allow use of the Jeep's crush cans, which have nothing to do with airbag deployment. They provide some flex during an impact, that's all. The airbags will still work with all aftermarket bumpers.

Crush Cans...necessary?

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Old 03-01-2012, 08:27 PM   #3
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I'm speaking from TJ world here... but i BELIEVE the airbags are accelerometer activated only. The crush cans should be for crash energy dissipation only.
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Old 03-01-2012, 08:33 PM   #4
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I'm speaking from TJ world here... but i BELIEVE the airbags are accelerometer activated only. The crush cans should be for crash energy dissipation only.
Yup...they absorb impact when used with the plastic stock bumper, and may actually prevent deployment of the airbag at low speeds when hit just right, but other than that they aren't really needed with a heavy steel bumper.

As far as I know, anyway.
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Old 03-01-2012, 08:55 PM   #5
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According to Dave at AEV, the stock crush cans help prevent deployment of the airbags under 6mph.

AEV's bumper is the only winch bumper every 'certified' (my wording) by Chrysler as airbag compatible and first winch bumper ever to come from the factory on a Jeep. It's the only one that's passed their design testing, etc.

Not using the crush cans simply creates a possible situation where the airbag could go off at a lower speed. As was said, removal of crush cans DOES NOT inactivate the airbags. The crush cans, in and of themselves, have nothing specific to do with the airbag system (electronic or otherwise).

Have fun-

T
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Old 03-01-2012, 09:00 PM   #6
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Airbags are triggered by an accelerometer. Essentially, a sensor measure the delta-V and triggers the bags at a predetermined point.

It is actually more complicated that that, because a number of sensors play a role, but that is the short version.
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Old 03-01-2012, 09:07 PM   #7
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Quote:
Originally Posted by theluckyones612
I'm looking for air-bag compatible bumpers. All I can find are ARB and AEV. Any others?

Also, I would like to know if anyone has experience with what it takes to activate the airbag. Example, if I am offroading and crush the sensor, and then reach the minimum speed to engage it, which I beleive is 45 mph, will that release the bag?

Thanks for any info you can help me with.

Joe
As far as I understand it, that's not how airbags work, thankfully. The preceding posts did a good job of discussing how they do and why your airbag will function essentially the same with any bumper or even if you remove the bumper altogether.
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Old 03-01-2012, 09:20 PM   #8
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Originally Posted by Comac90 View Post
According to Dave at AEV, the stock crush cans help prevent deployment of the airbags under 6mph.

AEV's bumper is the only winch bumper every 'certified' (my wording) by Chrysler as airbag compatible and first winch bumper ever to come from the factory on a Jeep. It's the only one that's passed their design testing, etc.

Not using the crush cans simply creates a possible situation where the airbag could go off at a lower speed. As was said, removal of crush cans DOES NOT inactivate the airbags. The crush cans, in and of themselves, have nothing specific to do with the airbag system (electronic or otherwise).

Have fun-

T
All of that has to do with certain requirements that the auto makers have to meet. AEV went that route on that bumper so it could be used directly from Jeep. However, in the real world the mean absolutely nothing. The crush cans represent approximately two 6" square areas of the bumper. Any impact would have to hit exactly that spot. The cans are then crushed, rendering your bumper useless and destroyed. The airbag is deployed based on how quickly and abruptly you decelerate, not on impact.
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Old 03-01-2012, 09:22 PM   #9
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All of that has to do with certain requirements that the auto makers have to meet. AEV went that route on that bumper so it could be used directly from Jeep. However, in the real world the mean absolutely nothing. The crush cans represent approximately two 6" square areas of the bumper. Any impact would have to hit exactly that spot. The cans are then crushed, rendering your bumper useless and destroyed. The airbag is deployed based on how quickly and abruptly you decelerate, not on impact.

Exactly why I bought the AEV Milspec without crush cans ...

Although, I'm no engineer, but I wouldn't say it means "absolutely nothing". It makes sense to me that crush cans on the end of the frame rail could prevent a minor fender bender, where the end of the frame rail was hit, from turning into an airbag deployment.

But ... again, I don't entirely disagree with you. That's why I went "sans cans", baby.

T
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Old 03-01-2012, 09:23 PM   #10
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Exactly why I bought the AEV Milspec without crush cans ...

T




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Old 03-01-2012, 09:26 PM   #11
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Old 03-02-2012, 02:07 AM   #12
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In the event they get crushed, the cans are designed so a body shop or competent mechanic can cut the old ones off and weld new ones on.
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Old 03-02-2012, 07:01 AM   #13
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Thank you one and all

This is fantastic news. I thought I was stuck with the two most expensive bumpers and now I can get my Rugged Ridge. Thanks again for all the info friends.
Joe

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