Caltrain purchased 16 used Bombardier BiLevel Coaches from Metrolink in 2014 to cope with increasing ridership by lengthening certain Bombardier sets from five to six cars. The $15 million purchase was financed by a farebox revenue fund. Since the cars had retired from Metrolink service, they required up to a year of rehabilitation before being placed in service with Caltrain. The ex-Metrolink cars were of older Series 1 and 2 that have riveted bodies, instead of the welded bodies in the Series 6 and 7 cars that Caltrain had purchased starting from 2002.