UNSPSC 25121501: Diesel freight locomotives

UNSPSC 25121501 Diesel freight locomotives (Commodity) encompasses heavy-rail and light-rail vehicle maintenance, overhaul, and modernization services rather than new locomotive manufacturing — state and local transit authorities are sourcing major component rebuilds, system upgrades, and fleet-lifecycle support for existing commuter rail and streetcar fleets. The work includes truck and axle overhauls, HVAC unit refurbishment and control-system modernization, and windshield wiper system replacement or modernization on rail vehicles, all performed to original equipment manufacturer specifications. Issuing bodies under this code are transit authorities and regional transit systems that operate commuter rail and light-rail streetcar fleets; Charlotte Area Transit System (CATS) and Utah Transit Authority (UTA) appear as active recent buyers.

Activity is concentrated in two states: North Carolina and Utah. Charlotte Area Transit System posted an RFP on August 18, 2026, seeking proposals for CATS IV Streetcar truck overhauls (Siemens trucks, hydraulic and braking systems) with a response date of October 20, 2026. Utah Transit Authority issued an RFP on April 24, 2026, for Bombardier Bi-Level HVAC unit overhaul and modernization covering 82 total units across 38 vehicles, with a response date of May 25, 2026 and a contract term through December 31, 2030. UTA also posted a Request for Information on August 11, 2026, for market research on electric washer/wiper system solutions for its 40-vehicle commuter rail fleet (12 Series 233, 10 Series 246, and 18 MP36PH-3C locomotives and Bombardier Bi-Level Cabs), with responses due September 25, 2026, representing non-binding pre-procurement outreach to qualify future RFP scope and vendor capabilities.