Does the 2011 Mazda CX 7 have a timing belt or chain?

The available engine options in the 2011 Mazda CX7 are equipped with a timing chain rather than a belt. Timing chains and belts both perform the same job and they both do it very well so it's not a matter of one being better than the other in that sense. The major factors that it comes down to is the cost and durability of the two parts. The chain will last longer than any belt will but it's more expensive to repair if You do run into any issues. The belt may also run quieter than a chain because it's lighter and made of rubber rather than metal but that's not all that noticeable. -