The 2016 bmw x4 is being reviewed, with information available on its prices, ratings, and specs. However, it appears that reviews and information are also available for other model years of the bmw x4, including 2017, 2020, 2021, 2023, 2025, and a different bmw model, the 5-series, is also being reviewed. The availability of reviews across multiple model years suggests that the bmw x4 has undergone updates and changes over time.