Rear clunking noise only when I turn left

[mydads535i]

I have a 1990 535i with 143K miles. My husband drove it for a week, and now there is a clunking noise from rear axle only when I turn left more than 45 degrees and at speed over 20mph. Ideas? I am waiting for snow to melt so I can work on it.
He thinks it is wheel bearing, I think it is suspension or differential.

[shogun]

Lift it up and have a look first. Maybe
dogbones http://www.bmwe34.net/E34main/Maintenance/Suspension/PitmanArms.htm
beer cans http://www.bmwe34.net/E34main/Maintenance/Suspension/SubframeBushing.htm
or just some bent metal or a broken exhaust hanger.

Symptoms of a Worn Wheel Hub Bearing https://www.knowyourparts.com/technical-resources/hubs-bearings/symptoms-of-a-worn-wheel-hub-bearing/
https://www.yourmechanic.com/article/symptoms-of-bad-or-failing-wheel-bearings

[mydads535i]

Thanks! it was broken exhaust hanger and a cracked exhaust pipe.