Nemo is knocking

[ohspecial1]

Hi Folks

Wonder if anyone can help with knocking on Citroen nemo 2010 diesel

its not top mount noise

I'm guessing drive shaft seems like if i said under the dashboard

Any tips or things to look for

[PaulC5]

Check the exhaust brackets in case one has rusted off the pipe - I have replaced a couple on a Cactus and one on a C3 using repair brackets from Autodoc that just clamp on. These gave a knocking noise and a check before looking underneath is to pull/push the tail pipe a bit to see if the noise is given.