In 2012, Moldovan Railway and Electroputere VFU company in Romania started a complete modernization program for D1 units (as D1M), with most of the parts changed, including installation of a new engine by Volvo Penta. In addition, the refurbished units were equipped with air conditioning system, wireless internet access points, and disability access ramps.12
Republic of Moldova presents new multiple-unit at railwayinsider.eu http://www.railwayinsider.eu/wp/archives/38210 ↩
"Moldovan Railway Summit" (PDF). Archived from the original (PDF) on 2014-04-16. Retrieved 2014-04-15. https://web.archive.org/web/20140416192234/http://moldovan.railwaysummit.com/wp-content/uploads/2012/06/struna.pdf ↩