SZ-VIT Wins Two-Year Siemens Vectron Overhaul in Slovenia

LJUBLJANA, Slovenia – SZ-VIT, the maintenance subsidiary of Slovenian Railways (SZ), has secured a two-year bodywork and bogie overhaul contract covering Siemens Vectron and ES 64 F4 locomotives. The award follows training in ETCS, SCMT and TBL+ onboard control systems and certification by Knorr for full brake maintenance. Work is delivered from five major workshops and five light maintenance depots located along the RFC 5 and RFC 10 European freight corridors.

What Does This Contract Cover?

The contract covers bodywork and bogie overhauls, 3D dimensional inspection and reverse engineering using a new A5 portable measuring arm, together with brake overhaul under Knorr certification. SZ-VIT has completed specialist ETCS/SCMT/TBL+ training for Vectron locomotives and, since June, has been carrying out its first Vectron overhaul for a long-standing international customer. The company is also expanding beyond electric traction: it maintains more than half of the out-of-warranty Stadler FLIRT and KISS units among the 72 operated by Slovenian Railways, and runs a dedicated wheelset replacement workshop in Ptuj.

Key Contract Data

How Does This Compare to Similar Contracts?

Commercial terms were not disclosed, and no independent third-party verification of the two-year contract value was available at time of publication. The technical scope, however, is significant because it pairs mechanical bodywork and bogie overhaul with digital train-control system maintenance.

European rolling-stock and control-system service spending is expanding: Europe leads the global rail signalling market, estimated at around EUR 20 billion in 2025, and global signalling revenue is projected to rise from USD 21.99 billion in 2026 to USD 32.60 billion by 2033. Hitachi Rail, which implemented Slovenia’s first ETCS in 2012 and maintains it for up to 20 years, shows how certification-based aftermarket services become durable revenue streams once digital control systems are deployed. (Source: Rail Market, 2025; Future Market Insights, 2025; RailwayPro, 2025)

The surrounding corridor is also being upgraded for higher freight throughput. The Črni Kal–Koper section of the Divača–Koper second track project was revalued at EUR 251 million, excluding VAT, with a revised completion date of March 31, 2026, which will increase pressure on locomotive availability once maritime-bound traffic grows. (Source: RailwayPro, 2025)

Editor’s Analysis

This contract marks SZ-VIT’s shift from parent-railway workshop to a commercial provider whose competitiveness depends on OEM certifications and digital measuring equipment. Pairing the Knorr brake certification with the A5 measuring arm allows SZ-VIT to perform inspection and overhaul functions that leasing companies would otherwise source through Siemens’ own maintenance network.

Predictive asset management and remote diagnostics are listed among the fastest-growing segments in railway system spending, meaning SZ-VIT’s ability to combine mechanical overhaul with ETCS-related work should strengthen its position with cross-border fleet owners. (Source: MarketsandMarkets, 2025)

FAQ

Q: Who awarded the two-year overhaul contract to SZ-VIT?
A: The customer is described in the source article as a long-standing international rolling stock owner, but its identity was not disclosed. The contract covers bodywork and bogie work on Siemens Vectron and ES 64 F4 locomotives.

Q: What is the value of SZ-VIT’s Vectron overhaul contract?
A: The value has not been officially disclosed by SZ-VIT or the contracting owner. The contract runs for two years and is supported by Knorr brake-system certification, a new A5 portable measuring arm, and ETCS/SCMT/TBL+ maintenance training.

Q: Why is ETCS maintenance capability important for this contract?
A: Vectron locomotives operating across European corridors often carry multiple national train-control systems, so owners need certified providers who can test and maintain ETCS, SCMT and TBL+ equipment on board. Slovenia has opted for ETCS Level 1 signalling, which reinforces the value of this capability along the RFC 5 and RFC 10 corridors.