See more from Ask Carzone 
Does a 2007 Astra have a belt?
Does a 2007 astra hv a timing belt or timing chain..and how often must they be changed..are they 100000 ks as norm ???
Our answer:
Hi Chris,
It all varies depending on the engine under the bonnet, as there were loads of different engines offered in that car. The 1.2, 1.3 and 1.4-litre engines all use timing chains, as does the rare 2.2-litre petrol. All the others use timing belts. The replacement interval varies from engine to engine, though, so come back to us with more information if you want us to look that up.
Have a motoring question? Ask us here!
Ask us anything motoring related and please provide as much information as possible so we can give you the most accurate advice.