 By 1972, Ford redesigned the hatch itself, with the glass portion of the hatch enlarged to almost the entire size of the hatch itself, ultimately to be supplemented for 1977–1980 with an optional rear hatch that was entirely glass.On October 30, 1970, less than two months after introduction, 26,000 Pintos were recalled to address a possible problem with the accelerator sticking on once engaged at more than halfway.On March 29, 1971, Ford recalled all 220,000 Pintos manufactured before March 19, 1971, to address a problem with fuel vapors in the engine air filter possibly igniting by a backfire through the carburetor.