Parts for your 2004 Honda Fit-Thermostat housing

2004 Honda Fit thermostat housing: what it does and how to look after it

Based on technical sources including the Honda Jazz/Fit 2002–2008 Service Manual (L13A/L15A cooling system) and Honda’s Electronic Parts Catalogue for the GD1/GD3 series, the 2004 Honda Fit is fitted with a thermostat housing (also called the thermostat case or water outlet). It’s a relevant, serviceable component on this model.

The thermostat housing on a 2004 Honda Fit holds the thermostat in place and directs coolant flow between the engine and radiator. By sealing the thermostat and providing hose connections, it helps the engine warm up quickly, then keeps temperatures steady once at operating temp. On the L‑series engines, the housing bolts to the block and seals with a shaped rubber O‑ring