159 1.9 Jtdm parking sensor not active
After gazing longingly at every 159 I see on the road for the last 5 years, one has recently come to my attention which I could not ignore. Whilst viewing I noticed that the "parking sensor not active" message was displayed. The garage agreed to look into it but then later advised that they had tried to rectify the situation by resetting the main ECU which subsequently blew. They are now in the process of obtaining a virgin ECU.
Has anybody heard of this before and can anybody advise whether Its safe to buy the car once the ECU has been replaced or, could it be hiding other technical gremlins. It's an 06 1.9 JTDM Lusso and I'm sorely tempted to buy and take the risk but I just don't know enough about electrics and what I could be letting myself in for.