What This Cooler Is and What It Fits
This is the charge air cooler (CAC) — some guys still call it an intercooler out of habit — that sits between your turbo and intake manifold on the DD15-equipped Cascadia. Its job is simple: cool the compressed air coming off the turbo before it hits the cylinders. When these start leaking or the fins get clogged with road debris, you lose boost pressure and the truck runs hot or down on power.
1030523A is a specific casting/version of the Freightliner charge air cooler line. Freightliner revised this part a few times over the Cascadia's run, which is why you'll see letter suffixes and superseded base numbers. The core dimensions, tank shape, and mounting points are what matter here — get those wrong and it either won't bolt up or won't seal against your existing ductwork.
Always pull your VIN and check the number stamped or tagged on the cooler you're pulling out. Freightliner build sheets change mid-year sometimes without much fanfare, and the last thing you want is a $835 core sitting on a shelf because the tank shape doesn't match.
How These Cross Numbers Actually Relate
1030523A traces back to base number 1030523 — the 'A' just marks a running production update, usually a minor tweak to the tank or mounting bracket, not a full redesign. TXE1030523 and TXE1030523A are the same castings under a different prefix, common when Freightliner sources through different supplier codes or reman channels.
1030486A and TXE1030486 show up as cross-refs because that's the predecessor casting before Freightliner's update — same footprint and mounting, but check your inlet/outlet duct sizes if you're comparing an older truck. 222378 is another OE reference tag you'll sometimes find on the tag itself. Alliance's N09 4401 1748 is their parts-network equivalent, same core physically, packaged under their catalog.
Where guys get burned on CAC cross-referencing is duct connection size and bracket mounting points — not the core itself. Before you order, measure your inlet/outlet duct diameters and check the mounting bolt pattern on the old unit. If the numbers on your old cooler's tag don't match what's listed here, call us with the VIN and we'll run it down before you buy.
Ordering From PartStop
We're in Tacoma and keep this one in stock more often than not because Cascadias with the DD15 are common freight-lane trucks up and down I-5. Same-day pickup if you're local and need the truck back on the road; we ship nationwide if you're not near us and can get it out same day on orders placed before our afternoon cutoff.
This is an $835 part, so we don't want it going back and forth on a guess. Give us the number off the old cooler or your VIN and we'll confirm fitment before it ships. Every cooler we sell carries our 6+ month warranty — if something's off with the part itself, we deal with it, no runaround.
1030523A Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 1030523A. 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 |
|---|---|
| OE/Cross-Ref | 1030523, TXE1030523, TXE1030523A, 1030486A, TXE1030486, 222378, 22769527, FRT18149, FRT18149N, HDH010808 |
| Alliance | N09 4401 1748 |
| Aftermarket | 1030486 |
Frequently asked questions
Does 1030523A fit my 2015 Cascadia with a DD15?
Probably, but 'probably' isn't good enough on an $835 core. Freightliner changed cooler specs across model years even within the same DD15 lineup. Give us your VIN or the number off your old cooler's tag and we'll confirm before you order.
Is this the same as the Alliance N09 4401 1748?
Physically, yes — same core and mounting, just packaged under Alliance's parts network numbering instead of Freightliner's. If your old part is tagged with either number, this cooler should interchange, but confirm against your old part before ordering.
My old cooler is stamped 1030486, not 1030523A — will this still work?
1030486 is the earlier casting this part superseded. In most cases the mounting and core size carry over, but Freightliner made changes to duct connections between versions. Check your inlet/outlet sizes or call us with the number and we'll verify 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.