Citroen Xantia Rear Suspension Cylinder – For the later style Xantia with the C5 Hydraulic pipe This part has the C5 pipe end REFURBISHED Citroen Part. Part number : 527220
Citroen Xantia Valve These were quite a common area for failure where the seal would blow out of the end.If you have a leak under the LHM tank it could well be this unit.