annoying rattles from the back

why do i have annoying rattles from the rear of my car when driving alone but no rattles when the boot is loaded. i have a 2008 1.4 micra with automatic gearbox.
 
Check your rear dampers first then check the rear springs by jacking up the car and checking for movement in the rear axle.
 
OP
OP
J
Check your rear dampers first then check the rear springs by jacking up the car and checking for movement in the rear axle.
thanks Mach1, these rattles have been there since i bought the car in 2018. i note your thoughts but wouldn’t these reasons be detected during the annual MOT’s? regards, Johnbee
 
some testers are more vigourous than others, as you say it would need a rolling road on the back to detect a no load rattle. mine passed with rear bearings shot and leaking grease onto shoes so MOT test is not infallible!:unsure:
 
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