British Rail Class 175

250px|thumb|right|175108, at Cardiff Central, in de-branded First North Western livery
250px|thumb|right|175008, at Newport, in the  Arriva Trains Wales livery.

The Class 175 Coradia is a model of diesel multiple unit passenger train used in the United Kingdom. They were built from 1999–2001 by Alstom at Washwood Heath in Birmingham. The fleet was based at Chester Depot. The fleet was used in North Wales on services from Holyhead, South Wales, normally going south or up to the North Wales Coast. Many also operated round the Manchester area.

175