Cars.com did a child/baby car seat check with the new Subaru and the ratings are mostly A's across the board! This makes the Impreza a great family car if you have small children who needs a car seat and this could be the same for teh new 2017 model if there weren't any changes for the last two years. Even though it was written in last year about the 2015 Subaru Impreza, there wasn't enough changes in the seats to warrant a new article.
A: Plenty of room for the car seat and the child; doesn't impact driver or front-passenger legroom. Easy to find and connect to Latch and tether anchors. No fit issues involving head restraint or seat contouring. Easy access to the third row.
B: Plenty of room. One fit or connection issue. Some problems accessing third row when available.
C: Marginal room. Two fit or connection issues. Difficult to access third row when available.
D: Insufficient room. Two or more fit or connection issues.
F: Does not fit or is unsafe.