Bumpers and safety.

Capt-Zoom

Well-Known Member
First Name
Capt-Zoom
Joined
May 27, 2018
Messages
823
Reaction score
587
Location
North
Vehicle(s)
2019 JL sport s, 4door. 1999 TJ Sport
Anybody know what the accident protective difference between a stock plastic bumper vs the steel bumper package would be? Anybody have front collision stats?

In the past i have always had steel bumpers which served me well.
Advertisement

 

WXman

Well-Known Member
Joined
Mar 1, 2017
Messages
2,744
Reaction score
2,803
Location
Central Kentucky
Vehicle(s)
2018 Wrangler Unlimited
Occupation
Meteorology and Transportation
The JL has certainly been tested by FCA with all factory bumpers to ensure correct airbag function and energy absorbtion to protect occupants. It hasn't been tested by IIHS or NHTSA yet, but will be soon.

However, aftermarket bumpers usually are not tested, and there is no data available on how they work in harmony with the airbag system and engineered crush zones on the Jeep to protect occupants in a crash. So, if you go aftermarket, you're assuming a certain level of risk. Of course, that can be said about tires, lifts, etc. also.

"If you wanna' play, you gotta' pay."
 

alphacc82

Active Member
Joined
Feb 17, 2018
Messages
33
Reaction score
21
Location
FL
Vehicle(s)
2018 Wrangler JLU - Punk'n
Watch for cheaper aftermarket bumpers if you care that much. Make sure to read reviews and such on quality, etc. A steel bumper from one MFG is probably not the same as another.

Also at high speeds its not going to matter much, lower speeds is where you'd see a difference compared to the factory plastic cover bumper and an aftermarket steel bumper. Remember there is some steel behind that plastic bumper just not a whole lot.
 

JIMBOX

Well-Known Member
First Name
JAMES
Joined
Feb 19, 2018
Messages
1,706
Reaction score
1,729
Location
FERNLEY NV
Vehicle(s)
2018 HELLAYELLA JLU SAHARA/2016 "STINGER YELLOW" RAM
The plastic JL bumper is the FACADE/FACIA for the STEEL FRAME END CROSS BAR ON BOTH ENDS, JUST LIKE THE JK-

whatever

JIMBO
 

RussJeep1

Banned
Banned
Banned
Joined
Oct 12, 2016
Messages
2,545
Reaction score
1,947
Location
Westchester, NY
Vehicle(s)
JLU Sahara
"Anybody know what the accident protective difference between a stock plastic bumper vs the steel bumper package would be? Anybody have front collision stats? "

As as to protective difference it might be best to break that (no pun intended) into two categories: damage to the rig and damage to its occupants.

There are a trillion variables to a collision, one of which is the tradeoff between the strength of steel, and in its inherent likelihood to more deflect, rather than absorb the energy of a collision, not necessarily a good thing: as that's energy's coming for you, and its ability to protect from further rig damage.

Contrast that with a more giving bumper which gets destroyed, along with much behind it, that takes the blow and absorbs energy your body, and that your passengers don't have to deal with.

Take this Volvo which features more and more rigid design as the passenger cabin is approached in the otherwise partial front impact test, where no engine blocks the passengers, and auto makers hate. This is a beautiful thing. Not because I enjoy seeing vehicles destroyed but rather passengers living to tell about it. Since this slow mo has no sound, I've chosen the second link for you to simulcast, both queued appropriately. Get the second video going first. ;)



And of course, there's probably been plenty Volvo vs Wrangler accidents where the former and its occupants incurred more damage, if for no other reason than in sedan vs SUV, all other things equal, SUV tends to win.

And who wants to take a Volvo off road or customize it? It won't get into an accident there because it won't move there.

In fairness, the JK, without side safety air bags no less, didn't so bad on this one.

 
Last edited:

melendez69

Well-Known Member
First Name
Marc
Joined
Jun 22, 2018
Messages
2,920
Reaction score
5,135
Location
Waxhaw NC
Vehicle(s)
2018 3.6 JLR / 2013 911 / 2013 E92 M3
Occupation
...huh?
Vehicle Showcase
1
The JL has certainly been tested by FCA with all factory bumpers to ensure correct airbag function and energy absorbtion to protect occupants. It hasn't been tested by IIHS or NHTSA yet, but will be soon.

However, aftermarket bumpers usually are not tested, and there is no data available on how they work in harmony with the airbag system and engineered crush zones on the Jeep to protect occupants in a crash. So, if you go aftermarket, you're assuming a certain level of risk. Of course, that can be said about tires, lifts, etc. also.

"If you wanna' play, you gotta' pay."

Could changing the bumper to an after-market void the warranty? I'm considering a grille guard, but it looks like I'd have to swap out the factory bumper, and Mopar doesn't have much to select from.
 

Sean L

Well-Known Member
First Name
Sean
Joined
Mar 9, 2018
Messages
30,079
Reaction score
160,759
Location
North Carolina
Vehicle(s)
2018 Jeep Wrangler Sahara, 2017 Honda Accord Sport, 2003 Yamaha V Star 650 Silverado, 2014 Yamaha V Star 1300 Tourer
Occupation
Retired Marine, Construction Estimator
Vehicle Showcase
2
"Anybody know what the accident protective difference between a stock plastic bumper vs the steel bumper package would be? Anybody have front collision stats? "

As as to protective difference it might be best to break that (no pun intended) into two categories: damage to the rig and damage to its occupants.

There are a trillion variables to a collision, one of which is the tradeoff between the strength of steel, and in its inherent likelihood to more deflect, rather than absorb the energy of a collision, not necessarily a good thing: as that's energy's coming for you, and its ability to protect from further rig damage.

Contrast that with a more giving bumper which gets destroyed, along with much behind it, that takes the blow and absorbs energy your body, and that your passengers don't have to deal with.

Take this Volvo which features more and more rigid design as the passenger cabin is approached in the otherwise partial front impact test, where no engine blocks the passengers, and auto makers hate. This is a beautiful thing. Not because I enjoy seeing vehicles destroyed but rather passengers living to tell about it. Since this slow mo has no sound, I've chosen the second link for you to simulcast, both queued appropriately. Get the second video going first. ;)



And of course, there's probably been plenty Volvo vs Wrangler accidents where the former and its occupants incurred more damage, if for no other reason than in sedan vs SUV, all other things equal, SUV tends to win.

And who wants to take a Volvo off road or customize it? It won't get into an accident there because it won't move there.

In fairness, the JK, without side safety air bags no less, didn't so bad on this one.

I do like how the wranglers design, by the nature of the cabin being narrower than the wheelbase, naturally deflects the vehicle away in that type of small overlap collision.
 
Last edited:

WXman

Well-Known Member
Joined
Mar 1, 2017
Messages
2,744
Reaction score
2,803
Location
Central Kentucky
Vehicle(s)
2018 Wrangler Unlimited
Occupation
Meteorology and Transportation
Could changing the bumper to an after-market void the warranty? I'm considering a grille guard, but it looks like I'd have to swap out the factory bumper, and Mopar doesn't have much to select from.
I cannot comment on the warranty issue because I don't know. I don't think it would affect warranty, since it doesn't really have the ability to cause other parts to fail. However, it may affect insurance rates. Grill guards are commonly referred to as "damage multipliers" because if you hit somebody, that's all the grill guard is good for...multiplying damage to your vehicle and to the one you hit. So that might be worth looking into.
 

melendez69

Well-Known Member
First Name
Marc
Joined
Jun 22, 2018
Messages
2,920
Reaction score
5,135
Location
Waxhaw NC
Vehicle(s)
2018 3.6 JLR / 2013 911 / 2013 E92 M3
Occupation
...huh?
Vehicle Showcase
1
Very interesting... I hadn't heard the term before, but I can understand it. It's worth looking into for a first-timer such as myself.
Thank you for the information & education
.:jk:
 
Advertisement

Rubitrux
 
Advertisement
Top