They may fit all years of a body style, but there could be changes that would impact their function.
Safe bet, if it has the same part number on the MVSS label, it will work. OEMs rarely change safety related part numbers without a reason as it requires recertification.
Be careful mixing and matching restraints on late model vehicles with airbags, ect. Liability gets sketchy should you sell the vehicle or something goes sideways.

source/disclaimer: am a restraints engineer for a supplier to multiple OEMs, but not this particular application.