Honda EK Civic Coolant Overflow Reservoir 19101-P2A-000

Honda EK Civic Coolant Overflow Reservoir – 19101-P2A-000

This Honda EK Civic coolant reservoir (19101-P2A-000) is the exact EK Civic factory reservoir Honda used on every 1996–2000 Civic. Hatch, sedan, coupe, or EM1 Si — they all share this same Honda EK Civic coolant overflow tank. It drops into the stock location and connects to the original hose and bracket just like your old tank did when the car left the factory. Pair the coolant overflow tank with the factory cap/elbow, 19102-P2A-000, for a full factory refresh of the coolant expansion system. Making for a lasting impression on your restoration or improvement from the yellowing, faded, cracked, or flat out missing pieces. 

This Honda EK coolant expansion tank manages hot/cold expansion so your coolant level and temps stay consistent. When the system heats up, it catches overflow. When it cools, it feeds coolant back in so you don’t slowly run the system low. The stock 1996–2000 Civic overflow tank usually yellows, cracks, or seeps around the seams after 20+ years — swapping to this Genuine Honda coolant reservoir cleans up the bay and stops those annoying weeps without any “universal” hacks. Every mount and hose connection on this Honda EK Civic coolant reservoir lines up like it should from Honda.

Key Features

• Direct OEM Replacement: Correct EK Civic factory reservoir for all 1996–2000 models: Civic DX overflow reservoir, Honda LX coolant reservoir, OEM Civic EX coolant tank, HX, CX, Honda EM1 coolant reservoir, and EK Civic Si overflow tank.
• Durable Construction: Factory-style Civic EK OEM coolant tank plastic that handles repeated heat cycles and long-term street use without turning brittle overnight.
• Restores Cooling Function: Keeps the coolant expansion and recovery system doing its job so your D- or B-series doesn’t creep low on coolant or flirt with overheating.
• Factory Fitment: True 1996–2000 Civic overflow tank that bolts into the OEM location with the stock bracket and hose — no trimming, drilling, or sketchy “universal” Civic EK heat-resistant reservoir setups.

If you’re chasing a hairline crack, tidying up a crusty engine bay, or putting an EK back to stock, this Factory-fit Civic coolant tank / Honda EK coolant reservoir (SKU: OHA-19101-P2A-000) is the straightforward, OEM-correct fix. We run this same Honda EK Civic coolant reservoir on our own cars because it just works the way Honda intended.