I have the 5000lb one. I lifted my wife’s Lexus GX460 which I think is like 5300lbs. I was just working on the brakes and wasn’t nor would get under it with that. Also had jack stands as back up. That said…….it seemed pretty darn sturdy to me.
It's not unfounded, in my opinion. I can see using them for brake jobs or tire rotations, but there's no way in hell I would ever crawl under one of those. The size of the bracket supports and safety locks ... Nope..
If it isn't unfounded, please provide your foundation? Some kind of engineering review that demonstrates they are unsafe. This is quite an accusation. Lots of people use these successfully.
The foundation of my opinion is based on spending thousands of hours under countless vehicles that were supported by 2-post lifts with a weight rating of 10,000 lbs, powered by heavy-duty hydraulic systems, with multiple redundant safety systems. Even then, there's an requirement for safe procedures - but ultimately, I felt safe standing under such a car all day. Factually, Quickjacks are not built to that spec. I've not accused anyone of anything. I've just pointed out that I'm not a fan of them, for reasons I already gave. Lots of people don't use a torque wrench on lug nuts, and it's successful until it isn't.
I think you'd be fine with the 5000. Not sure about the X3 weight and jack points. Definitely check those beforehand. Also agree with previous posts about the car being more stable with hoses to the front. Always back it up with jackstands.
exactly this right here. ^^ I’m a “what if” kind of guy, vehicle moves a little too easily on the jack for my comfort zone.