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?

Are BMW timing chains unreliable?

I'm hoping to get a BMW 1 series in the not too distant future but I keep reading horror timing chain stories. Is there any statistics to say the N43 petrol is stronger than the N47 diesel?