Bear in mind the rear reinforcement bar is not a safety equipment. It is a repair reduction equipment for low speed <5mph collision.

The rear bumper material must be weaker than the actual beams it is mounted on. Otherwise it is worse to get chassis structural damage from the low speed collision.

The proper rear bumper has collapsible structure just like the front one. Gotta make sure UR product strength is just adequate, but not over. Otherwise good luck...

This is because the beams (circled in picture below) themselves are not strong enough entirely, even put reinforcement bar will still collapse in.
Remember, if they make the 2 beams stronger... then reinforcement around B, C pillar need to be even stronger, all cost $$$

There's no way around it except get a different car model.



This post has been edited by constant_weight: Feb 9 2024, 10:18 AM

We don't know, that's exactly the point.

Just as we don't know how strong UR bar is.

It is at your own risk.

Later low speed 10-15km/h collision, initially only need to repair bumper and trunk. Now become chassis misaligned, repeat wheel alignment also off.

Maybe no problem at all, who knows.

Now, I strongly against car marker for not installing the bar.

Only we need something proper design, structural calculated, at least in simulation.

If only UR can provide data, which I doubt.

Lol.... it is not I agree or not. I don't argue the need to have it, I argue only we need a proper one.

It is wether you trust UR do proper work of structural analysis you mentioned.

Do you? I don't.

Remember that is not anti collision bar. To be precise, that bar is the bumper itself.
The plastic bumper as we know in modern car is bumper cover.

Bumper is designed for low speed collision damage repair reduction. So your "anti collision bar" should deform on low speed collision, so the force not taken by the chassis directly.

The actual safety is built into chassis. The Alza MPV is just plain weak chassis. You put a hot formed, boron steel bar also collapse all in.

Again I against cut cost to eliminate the bumper. Better option is order one OEM from other market, or at least find 3rd party option made from aluminum with deformable structure.

Unless you trust UR. They have decent paint and welding quality, but not proper material structural analysis.

This post has been edited by constant_weight: Feb 9 2024, 08:54 PM

Just ask UR if they can provide this for their "anti collision bar" (which is bumper itself to be precise)

I rest my case 😌