I have been told I need new anti roll bar joints ( I think thats right!) the symptoms being when it is wet I get a knocking noise, I will get it sorted soon The puzzle is, occasionally I get a noise like something is knocking around under the bonnet trying to get out, it really does sound as if someone is knocking on the bonnet from the underside, it will suddenly start and may last seconds or minutes, yesterday it did it on a 10 min journey home, when I drove it today, no noise at all!! weird or what? could it be coming from the anti roll bar as well? or do I have another problem?