Fluctuating coolant temperature, pressurisation or just coolant leaks (so annoying!)? Before damage occurs to the engine due to overheating, cylinder-head warping with gasket failure and coolant mixing with lubricant (that is never ideal!), an overhaul of the Cooling system may be in order.
Apart form this component you may also wish to consider some of those listed below:
Add as many items as you wish to the same shopping cart, new rad-cap 19045MZ1621, res-tank cap 19104MB0700 and anti-vibe rad mounts 19051KA383019052MGH640 for example, and still only pay the same single fixed price shipping cost.
This part may have other applications in the Honda model range, so please check the part-number is correct for your particular model before ordering?