EM4 Electric Trainsets (Cyrillic ЭМ4, known as "Sputnik") were produced from 2003 to 2006 by the JSC "Spetsremont" factory. Their cars have a common interior space. Each car has three pairs of sliding doors propped-designed only for the high platforms. EM4 "Sputniks” have operated on the following rapid suburban routes:
• Moscow - Mytischi – Pushkino,
• Moscow - Mytischi - Bolshevo,
• Moscow - Lyubertsy 1 – Ramenskoye

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  A Scale Models of an EM4 “Sputnik” Electric Multiple Unit and a RA2 Multiple Unit at the Museum of the Moscow Railway
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  EM4-001 «Sputnik» at Yaroslavsky Rail Terminal, Moscow
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  EM4 and ER2 electric trainset at Yaroslavsky Rail Terminal
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  EM4 electrical multiple unit at Elektrozavodskaya railway station
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  EM4 electrical multiple unit at Vykhino
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  EM4 electrical multiple unit at Vykhino

• The Museum of the Moscow Railway, at Paveletsky Rail Terminal, Moscow
• Rizhsky Rail Terminal, Moscow
• Varshavsky Rail Terminal, St.Petersburg
• Finland Station, St.Petersburg
• History of rail transport in Russia

• JSC "Spetsremont" factory (Russian)