Cars 7211–7590 (380 cars) used to be R142As and were converted to R188s from 2010 to 2016, car numbers 7811–7898 (88 cars) are the new R188 cars built to supplement the increase in 7 service, and cars 7899–7936 (38 cars) are the new R188 "C" cars built to expand converted R142A sets from five cars to six cars (Most A-Division lines use 10-car trains, while the use 11-car trains, necessitating the addition of one new car to convert the sets).
