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Old 06-23-2019, 07:36 AM
pgreen822 pgreen822 is offline
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Rollover Safety Bar?

Is anyone aware of an after market roll bar or some other type of device for my 2018 4 Series Convertible? I saw a pretty bad accident last week where the car flipped and all I can think about is what would happen to me if my car flipped over.

Thanks!
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Old 06-23-2019, 10:12 AM
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quackbury quackbury is offline
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You already have something that functions very much like a roll bar. BMW convertibles are equipped not only with a reinforced widshield surround, but with the BMW Rollover Protection System - two rams behind the rear head restraints that fire upward when an imminent rollover is sensed.

http://content.bmwusa.com/microsite/...n/rollbar.html



If you speak German, here's a video of the similar system in the Opel:



Is the system perfect? No. There was a situation a couple years ago where a moron was driving his 435 vert over 100 mph on city streets in Boston, and rolled with enough force to defeat the system. Would an SCCA-type roll cage system have been better in that situation? Yes. But unless you are a dedicated track rat (in which case you would be driving a Coupe instead of a vert anyway) you probably don't need the added cost and reduced convenience of a roll cage.

And even a roll cage has its limits. That crash in Boston a few years back? Two passengers died, not because of the rollover system, but because the yahoos weren't wearing seatbelts and were ejected from the 435 as it barrel-rolled. The best roll cage in the world is no match for Darwin. And if you live anywhere near a spot where Jeeps go off-roading, ask your local ER doc about how many traumatic amputations he's seen where properly-belted passengers in a Jeep with a full roll cage lost an arm or a leg in a rollover. Drivers of open-top race cars have tethers to help keep their arms attached to their torsos in a rollover; a bit unwieldy for street driving. And even sedan drivers often race with window netting to keep their appendages inside the vehicle when it rolls. (Many HPDE events require drivers to have their windows rolled up for this reason.
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Old 06-24-2019, 05:37 AM
pgreen822 pgreen822 is offline
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This is very helpful thank you. When I look at the rear headrest, there is what appears to be spot for an opening for the rollover protection system. I'm assuming that's what I'm looking at?
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