Thinking on buying a 2012 Audi a4 2.0 tdi 136bhp 6 speed model. Ex-company car done 120k but has full service history and receipts etc

How reliable is this model of a4 with this engine fitted? (b8 model)

When is it due a timing belt or chain?

I checked up it has had the emissions update carried out

Im only thinking of keeping it for about 6 months until I finish my placement job - Economy, tax and insurance seem very reasonable

Any advice welcomed thanks