PRODUCT DETAILS
Honda K20A2 / K20A3 Bypass Inlet Hose 19504-PNA-000
If you’re chasing a mystery drip or you’re doing a real K-series Engine Hose Replacement, don’t skip the small stuff. The Honda Bypass Hose 19504-PNA-000 ties into key coolant passages on your K motor and keeps flow doing what it’s supposed to do. When this hose gets tired, it usually doesn’t fail in a dramatic way, it just starts weeping and you only notice it after the coolant level keeps dropping.
This is a Honda OEM Inlet Hose replacement for the K20A2 and K20A3 applications in the 2002 to 2006 Acura RSX and the 2002 to 2005 Civic Si. Heat cycles cook the original Honda Coolant Rubber Hose over time, it hardens, swells, or cracks, and then you get a slow leak that turns into an overheating problem at the worst possible time. We’ve replaced plenty of these during coolant refreshes, and it’s one of those parts that’s cheap compared to the headache it prevents.
Because it’s molded to the right shape, it routes cleanly without fighting you. That matters, because a universal straight hose can kink, rub, or sit under tension, and that’s how you get leaks again. If you’re doing a cooling overhaul, this is the correct style piece to keep your bay looking and working like it should.
Key Features
- Direct fit Honda K20A2 Inlet Hose and Honda K20A3 Inlet Hose bypass inlet replacement
- Keeps coolant moving through the correct passages, no sketchy reroutes
- Molded rubber shape for proper routing, no kinks, no stress
- Fixes the common aged hose issues like hardening, swelling, cracking, and slow leaks
- Smart buy during maintenance, repairs, cooling system refreshes, or rebuilds
Fits the following vehicles:
2002–2006 Acura RSX (K20A2 / K20A3)
2002–2005 Honda Civic Si (K20A3)
If you want your cooling system to stay boring in the best way, replace this hose before it fails. The Honda K20A2 K20A3 Bypass Inlet Hose 19504-PNA-000 keeps your coolant routing correct and saves you from playing “where’s that leak coming from” in your driveway.