What This Hose Is and Where It Goes
This is a molded piece, not straight stock - it's got specific bends built in to route around the fan shroud and clear the alternator bracket on 3800/NGD applications. The 2.5 to 2.25 step-down is molded into the hose itself, so you're not stacking reducers or cutting bushings to make it work.
Because it's molded to a factory routing, a straight or universal hose won't hold the same path without kinking or rubbing on something under the hood. That's the whole reason International cataloged a specific molded part instead of letting shops make their own out of flex hose.
Watch your ID at both ends before you order - some trucks in this range got a straight 2.5" hose depending on radiator tank casting. Measure the old hose or check the tag on it if it's still legible.
How the Cross Numbers Line Up
2003489C1 is the headline number, and 2003489C2 shows up as a running change - same hose, minor spec revision International made at some point. F02515S352 is the aftermarket cross that matches the molded shape and both bore sizes.
2007779C1 and 2007778C1 are related International part numbers but they're not always direct subs for this exact hose - they can be for a different radiator configuration or a companion hose in the same cooling circuit. Don't assume interchangeable just because the numbers are close in sequence.
Surest way to confirm: pull the old hose and check for a molded-in part number, or run your truck's VIN through International's parts lookup. If the old hose is too degraded to read, measure both ends and count the bends against a picture of 2003489C1 before you order.
Ordering From PartStop
We keep this hose in stock at the Tacoma counter for same-day pickup, and we ship it nationwide if you're not local. At $72.99 it's not a part you want to guess on and reorder twice for shipping costs.
This is aftermarket, not a factory hose, and it carries our 6+ month warranty. If it doesn't match your old part's routing or bore sizes, call us before you clamp it on - a return is a lot easier before it's full of coolant.
2003489C1 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 2003489C1. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| International | F02515S352, 2003489C2, 2007779C1, 2007778C1 |
Frequently asked questions
Does 2003489C1 fit my International 4300?
Not necessarily - this hose is cataloged for 3800 and NGD engine applications, and the 4300 could have a different radiator hose depending on engine and model year. Confirm with your VIN or by checking the number on your old hose before ordering.
Is F02515S352 the same as the International 2003489C1?
F02515S352 is the aftermarket cross-reference for that hose - same molded shape, same 2.5" to 2.25" step-down. It's built to interchange with the International number, but always confirm fit against your old hose's routing and bore sizes since running changes happened over the years.
My old hose has 2007779C1 stamped on it - will this one work?
Maybe, maybe not. That number sometimes shows up in the same cooling system but isn't guaranteed to be this exact upper inlet hose - it could be a companion hose with different bends or bore. Surest to measure your old hose against the specs for 2003489C1 or have us check by VIN before you buy.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.