Should I replace my 12-year-old BMW 320i's PAS pump?

My 12-year-old 320i SE automatic salon BMW has provided good and relatively trouble-free driving for the past six years. Unfortunately, the steering has recently become stiff and noisy, and my local BMW dealer has quoted £950 for fitting a new PAS pump - probably more than the car is worth. The car is still drivable, but is it likely to suffer catastrophic failure (with no immediate warning), or will it just die a quiet and gentle death? Is the car, in your opinion, worth repairing? I know this is a 'how long is a piece of string' question, but I have little money and even less interest in buying a newer car, combined with zero knowledge about the combustion engine.

Asked on 14 September 2013 by VR, Abingdon

Answered by Honest John
If the PAS dies the car will still steer, but will take a lot of effort to steer. You might be able to get the pump re-conditioned. Try someone like this:
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