Coolant Reserve Tank Set - Honda Acty Truck HA3, HA4 Models - 1990-1999

This coolant reserve tank fits the Honda Acty Truck HA3, HA4 (1990-1999). It holds the overflow coolant and lets the system draw it back as it cools. @media (max-width:767px){.og-shiph{display:block!important;position:relative;padding-left:16px}.og-shiph>span{position:absolute;left:0;top:6px}} In Stock - ships from our California (USA) warehouse Fast, reliable delivery - no overseas backorder wait. Vehicle Fitment & Compatibility Confirm your chassis code against the table below before ordering. Honda Acty Truck HA3, HA4 (1990-1999) - fitment Make Honda Model Acty Truck Chassis Codes HA3, HA4 Years 1990-1999 Part Type coolant reserve tank set 100% Fitment Guarantee Not sure about fit? Add your chassis/VIN number at checkout and we confirm it before we ship. If a part does not fit your Acty, we exchange it or refund you in full. Reasons to choose this coolant reserve tank A cracked, brittle, or leaking original tank Coolant loss with no obvious engine leak A missing or discolored reservoir Features & Function Holds and returns overflow coolant Correct fit for the Acty cooling system Restores a sealed expansion circuit Installation Specifications Difficulty: Easy. Estimated time: about 30 to 45 minutes. Required tools: A screwdriver, hose pliers, and a catch rag. Oiwa Garage Tech Note "Route the overflow hose without kinks and set the level between the marks when cold. A cracked reservoir loses coolant slowly and looks like a mystery leak." Frequently Asked Questions How do I know the reserve tank is the leak? If you lose coolant with no obvious engine leak, check the reservoir for cracks and a hard, brittle feel, and watch whether the level drops there. A cracked tank leaks slowly and looks like a mystery. Do I need to bleed the cooling system after? Yes. Refill and bleed the air out so the system cools properly and the engine does not overheat. Fitment verified by the Kei truck specialists at Oiwa Garage · Listing updated June 2026.