The problem with the car is the inner 1/4 shaft and the outer short shaft splines have worn away over the years, yes it is wear, but its simply a poor design.

All Alhambra/Galaxy do it at high miles, I have changed loads of them, you MUST buy both sections, I have never seen one damage the gearbox ever.

as of about a month ago, the parts where excatly the same price each section at approx £140 plus vat (£280+vat).