The 2016 Mazda CX-5 represents the absolute refinement of the first-generation platform before its generation shift. Mazda CX-5 - Википедия

The CS16 calibration family appears most commonly on models from roughly 2014–2018 (Skyactiv-G 2.0L and 2.5L engines).

If you are searching for a "Mazda CS16" as a modern used vehicle purchasing option, you are looking at the pinnacle of Mazda's first-generation and Kodo: Soul of Motion design language. The year 2016 was a sweet spot for Mazda, marking a period where mechanical reliability caught up with cutting-edge cabin premiumization.

It is highly likely that you are referring to one of the following, which are often confused due to naming conventions or regional badging:

A shorthand mix of Mazda’s "C" segment designations (like the CX crossover line) combined with the highly sought-after 2016 production year.