Parts for your 2016 Toyota Bb-Water pump

2016 Toyota bB water pump: what it is, what it does, and when to replace it

Referencing the Toyota Electronic Parts Catalogue (EPC) for bB model codes QNC20/QNC21 and the Toyota Global Service Information (TIS) engine mechanical sections for the K3-VE and 3SZ-VE engines, the 2016 Toyota bB is fitted with a conventional, belt-driven water pump (listed as “Water Pump Assy” in the Cooling section). Daihatsu service literature for the related engines corroborates the same pump layout and service procedures. So yes, a water pump is absolutely relevant to this model.

On the 2016 Toyota bB, the water pump keeps coolant moving through the block, head, heater core and radiator, preventing hot spots and helping the thermostat hold steady operating temperature. It’s a mechanical pump driven by the auxiliary (serpentine) belt, with an internal bearing and mechanical seal to keep coolant contained. When it’s healthy, the engine warms up smartly and stays in its sweet spot