PRODUCT DETAILS
Honda EK Civic Coolant Overflow Tank Cap w/ Elbow – OEM (Part #19102-P2A-000)
This Honda EK Civic coolant cap (Honda coolant cap 19102-P2A-000) is the genuine OEM Honda coolant cap for the factory expansion/overflow tank on 1996–2000 Civic models. It snaps right onto the Honda EK Civic Coolant Overflow Reservoir (19101-P2A-000) and gives you the correct seal and coolant recovery you expect from a Civic OEM overflow cap.
Unlike some Acura Integra or aftermarket caps that need a separate elbow, this EK Civic coolant tank cap comes as a one-piece molded unit with the Honda Civic coolant elbow built in. That integrated design means fewer joints to crack or leak, more consistent coolant flow, and OEM-level reliability. If your EK Civic reservoir cap is yellowed, brittle, or missing entirely, this EK Civic OEM tank cap is the straightforward way to get your 1996–2000 Civic coolant cap setup back to how Honda intended.
Honda built this to the original EK Civic Si coolant cap and standard EK spec, so it drops in with zero modification. Keeping the Honda expansion tank cap EK setup in good shape matters more than most people think: when the Civic coolant tank cap OEM piece doesn’t seal, the system can’t pull coolant back in as it cools. That leads to coolant loss, random temp swings, and air pockets that make bleeding a pain. Swapping to a genuine Honda overflow cap helps stabilize temps and keeps you from chasing “mystery” overheating issues on your EK.
Key Features
- Genuine Honda OEM coolant overflow / expansion tank cap (Civic OEM overflow cap)
- One-piece cap with integrated Honda Civic coolant elbow
- Direct fit for EK Civic coolant expansion tanks and Civic coolant tank cap OEM replacements
- Restores proper coolant recovery, sealing, and overflow function
- Perfect for maintenance, daily-driven EKs, or OEM-plus/restoration builds
Vehicle Compatibility
- 1996–2000 Honda Civic (all trims)
- 1999–2000 Honda Civic Si (EM1)
If you’re rebuilding an old EK or just fixing the small stuff that keeps your car honest, this genuine Honda EK Civic coolant tank cap (SKU: OHA-19102-P2A-000) is the correct EK Civic reservoir cap to run. It’s the same EK Civic coolant overflow tank cap with elbow Honda spec’d from the factory, and it’s what we use on our own Hondas when we want OEM parts that just work.