Common fault unfortunatly. I think one of the tensioner puley bearings fail , that leads to aux belt fail, which whips its way around the timing belt and hey presto , new engine.
Just to pour on some salt mies on 209,000 . Owned it from 138,000 and its been very good in terms of reliabilty. I have changed aux belt , tensioner and AOP. The local garage mis diagnosed the AOP failing as PS pump so changed that as well pointlessly.
However its starting to die.- 53 plate D5 which is 30,000 miles past cambelt change date . RWW fail, drivers window fail, drivers mirror fail, central locking on drivers door fail, radio self retunes to other presets as you drive along, NSR wheel bearing humms after a long drive . So its going very soon to be replaced with an 05 SAAB 9-5 2.2 Tid estate with 112,000 and FSH bought for £960 yesturday.
Engine swap from a write off is the way to go IMO. Although the amount of ECU modules and CAN BUS systems on these cars will cause you head aches in getting the thing runnning again