- I wondered if anyone could help me with this one. I have today fitted a brand new starter motor to my Peugeot 407 2.0 hdi. The starter is brand new but after fitting I am still getting the old starter spinning but not engaging issue. Does anyone know what this could be? It is driving me nuts and can’t seem to sort this one. Have tested that the starter is functioning ok but once fitted it just spins and does not engage. Have i done something wrong? Any help would be much appreciated.