Obscured rear vision on sportwagons. replacements for original replaceable rear blade carrier do not correctly fit the original wiper arm assembly (mounted to the rear window). both recently supplied mazda(!) and aftermarket blade carriers have a new tab that interferes with the wiper arm assembly, preventing pressure being fully applied to the tips of the rubber blade. consequently, only a small, central portion of the rear window is wiped clear of rain, snow or mud. that is hazardous. *tr