these cars were found to be unreliable, even after the refurbishment of six in 1989–91. In 1989, STE placed an order with Concarril for 12 all-new LRVs with similar capacity, to the same design as LRVs Concarril had recently supplied to Guadalajara's light rail system. Numbered 017–028, the order's first cars arrived in January 1991 entered service on 6 December 1991, replacing all of the Moyada cars except on the Tlalpan shuttle service. When Tlalpan service was withdrawn again in October 1992, the Moyada cars were no longer used. However, in 1992–93 three Moyada cars (005, 010 and 016) were again fitted with all-new bodies, now to a design intended to resemble the Concarril cars, this work being undertaken by local firm Sintra S.A. The three "Sintra" cars, as they were known, the fleet's last to use PCC-type control systems, entered service on 1 June 1993. They were withdrawn in late 1995, and shortly afterward the voltage of the line was raised from 600 V DC to 750 V. The newer cars had already been able to operate at the higher voltage. Four additional LRVs of the same type as the Concarril units were purchased later, in 1995, numbered 029–032. These were built by Bombardier, which had acquired Concarril in 1992, but were built in the same factory (in Ciudad Sahagún) and were nearly identical to STE's 12 Concarril cars. In the mid-2000s, four more cars were purchased later from Bombardier, numbered 033–036, and they entered service on the Xochimilco light rail line in September and October 2008, increasing the fleet size to 20 cars, numbered 017–036. On 30 August 2011, on its way to Huichapan station, car 031 was hit, while coming to a stop, at full speed by car 027. Twenty-nine people were injured. The two LRVs sustained heavy damage. One half of each two-section LRV was scrapped, and in 2013 STE hired Bombardier to supply two all-new half-car sections and to combine them with the undamaged halves of the two LRVs. Cars 027 and 031 both returned to service in autumn 2014. Meanwhile, another four new LRVs were purchased from Bombardier in 2013–14, which would be assigned STE fleet numbers 037–040. They were delivered in summer 2014 and entered service on 16 March 2015, increasing the size of the fleet to 24 cars (numbered 017–040). Stations {| class="wikitable" rules="all" |- !rowspan="2" | Pictogram !rowspan="2" | Station !rowspan="2"