Drago

Are they going off as if you have backed up really close to something? If so they may be sensing the top of the tow bar. Did you have the tow bar fitted at a Toyota dealer? If you had it fitted by Toyota I would take it back and explain the problem to them, if it is because of the placement of the tow bar they should fix it free of charge. If its not because of the tow bar, is your car still under warranty?

No the towbar was fitted by an independant fitter and since then the sensors go off not every time but most times I reverse.

Just had a towbar fitted to my 09 Aurion, now the reverse sensors go off for no reason when reversing without a trailer. Can anyone assist