Platform is not the same, so doubtful the mats would fit.

Crosstrek switched to the Subaru Global Platform in 2018. 2017 and earlier is a different car.

 

Gen1 mats do not fit Gen2. However the back seat protectors fit.

 

Not the exact years, but I used my mats from 2016 Crosstrek in my new 2024 . I drilled new holes and reinstalled the old gromets on the driver side. They fit close enough for me, the 2016 had a fuel latch lever and the new one doesn’t. The rear cargo tray also fit with a little trimming

 

No offense @Randyb but I would have bought different mats.

 

2018 mats don’t fit properly in the 2015 model. Except the passenger side which is 95% ok.