This Cover, Housing is the most expensive of the items that make up this Waterpump assembly.
In this schematic the "Bolt,socket" is used most often.
Parts such as the Waterpump: Oil Seal (4v2), Cover, Housing, Bearing(4jt), Bolt,socket are included in the Tz125 1999 4jt6 Portugal 294jt-100e1a Waterpump parts fiche.