Had an 05 Touran here, from 2.5 years/15k old upto a few months ago/160k.
Good, really practical car. Good MPG. Comfy.
It went wrong a lot more than I would have hoped for, and cost a fortune when it did (which modern car does not?). We had to replace or faults with DMF/Clutch (@38k), DPF, ABS (£1500+), 3xpairs of lower arms, 1x upper arms, airbag fault, horn died, three out of four glow plugs etc etc
Would I buy another? I would go Toyota route – having had alongside the Touran a Yaris that is now on 100k and never been any bother beyond a pair of wheel bearings.