This heater blower fan motor resistor is compatible with part numbers 6441 AA, 6441 AF, 509961, and 7701209850.It is designed as a direct replacement for use in vehicle heating and defrosting systems.Fits select models including C1 (B4), C3, C4, C5, DS4, C3 PICASSO (2008–on), 108 (2014–on), 207 (2006–2012), 208 (2012–on), 2008 (2013–on), 308, 308 CC, 308 SW (2007–2013), 508, 508 SW (2010–on), RCZ (2010–on), CLIO MK3, MK4 (2005–2014), CLIO GRANDTOUR (2008–on), SCENIC MK3 (2009–on), CC (2010–on), MK3 (2008–on), (2004–2012), TRAFIC MK2 (2001–2014), TWINGO MK2 (2007–2014), and WIND (2013–on).