Don't know what the position is in Uk but here in Ireland the main dealers are blocked from ordering parts for a jdm Yaris. Went into my dealer today and get on great with my parts guy but wanted to price TPMS for a new set of wheels and when he put in my reg it wouldn't allow him order them, now he said he could order regular ones but wasn't sure with connection issues etc. Service bits are ok oil, filters etc but I am thinking that here Toyota is going the same route as BMW Dealers and jdm BMW's and parts.
