Engine management light came on recently and I've been quoted £475 for a new cooling fan motor by the main dealer.

Is this excessive, bearing in mind they can do it tomorrow and I have a long journey this weekend?

Also, what other problems related to this could I expect? I have noticed oil consumption for the first time recently, could this be related? I've now covered 146,000 miles in the 6+ years of ownership, is it just a sign of old age?