I need to source a replacement starter motor for my 2012 mk 11 TT Quattro TDI. The present unit is a VALEO one with a part no. 02M 911 024N with an 11 tooth pinion. A replacement VALEO unit from a reputable supplier has 12 teeth and they assure me this will fit and operate satisfactorily. My elementary gearing knowledge says this wont work. Has anyone experience of this or an opinion? David.