Driving without cooling water…

Hallows together. Since the beginning of July 04 I can also count myself among the Saab owners. I bought an Aero (04.2002) with about 4400km as a demonstration car. Current mileage 12800. Sunday evening, message from the info display; refilling cooling water. My thought was; hm already now?!? I wanted to make sure how much water is needed when driving home and parking. Now comes the hammer; yawning teaching in the system!!!! The TCS (ADAC) meant it was around the water pump which The garage meant the same thing and changed it, with the explanation, defective due to damage to the condition. Now my question to you: – Can this really be?? – Is this a well-known Saab problem (water pump) ? The repair amount is about 500 SFr. (330EUR) The workshop is now trying to take part of the amount at Saab on kulanz, which I hope very much. I assume that this is a slip of my Saabinchen. Gruss, Oli