Does the 2007 Mazda 3 1.6 petrol use a timing chain or cam belt?

Does a 1.6 petrol 2007 Mazda 3 have a timing chain or cam belt?

Does the Fiat 500 Twin Air use a belt or chain?

I have a 2015 Fiat 500 Twin Air which has done 33,000 miles. Should I be considering having the cam belt changed?

Why are there no chaim cam spares for my 2011 Skoda Fabia Elegance 1.2?

I'm buying a 2011 Skoda Fabia Elegance 1.2 TSI from a Skoda dealer. The vehicle requires a new cam belt but there are no spares available in the UK. Does this bode ill for the availability of future spares?

Should I buy a 2011 Audi A3 or a 2014 Nissan Qashqai?

Should I buy a 2011 Audi A3 1.8 TFSI with 18,790 miles for £12,600 or a 2014 Nissan Qashqai 1.6 petrol with 20,531 miles for £12,500? Are there any problems to look out for?