Ours was an 05, bought at 3 yrs / 30k old, ex motability, 1.9tdi S. I ran it upto 150k odd in 5 years.
It was not as well screwed together as I was expecting, it had no rear speakers, or wiring for, or wiring for a towbar. It went wrong more often than I would have liked – ate suspension arms, went through two clutches, DPF, dreaded ABS failure, glow plugs etc. Final daft bit was that the boot strut bolts on the car are not accessible without cutting a hole in the bodywork to access – and one of ours fell off….
It was sold to a mechanic as the turbo started playing silly sausages, suspension arms went again, and the clutch then started slipping again – so I binned it openly as a ‘needs work’, and still got £2k for it 😯
Having said all that, it was comfy, mega practical and robust enough inside, did a *lot* of miles with canoes or bikes on and cost only £6k depreciation (in fact it cost more to maintain than depreciation).
I would be wary of another, but wouldn’t say no.
The Galaxy is better screwed together, and so far (2.5 years and 55k) much more reliable.
EDIT: I would look at an Altea XL over a Touran these days, especially if you don’t *need* 7 seats. Reviews less positive, but bigger and a proper bargain.