What You're Actually Buying
This is the plastic coolant reservoir off the Cascadia — the overflow/surge tank that sits up front near the radiator support and takes the expansion from the cooling system. Freightliner used it across the M2 line too, depending on cooling package.
It's a straight bolt-in tank, molded plastic with the usual mounting tabs and hose bosses. No machining, no splicing hoses to make it fit — assuming your truck is one of the years this part number covers.
Plastic tanks like this don't fail from age so much as UV and heat cycling. You'll see stress cracks radiating from the mounting bosses or a cap neck that's gone brittle. Once it's weeping, it's done — there's no patching these reliably.
Reading the Cross Numbers
A0525263005 shows up under a few related Freightliner numbers — A0533118000, A0525263003, and A05-25263-007 — because Freightliner revised this tank a handful of times over the Cascadia's run without changing the physical mounting pattern or capacity much. Automann's 575.1073 and Alliance's N20 A0525263007 are aftermarket versions built to the same footprint.
The number changes usually come down to minor tweaks — a different cap style, a revised sensor boss, or updated hose bib placement — not a different tank size or shape. That's why they cross. But 'usually' isn't 'always,' so don't just eyeball it.
Before you order, pull the number off your old tank or run the VIN. If your old tank's number isn't in that group, don't force it — even small differences in hose bib angle or sensor mounting can turn a 20-minute swap into a fight.
Buying It From Us
We keep this one in stock at the Tacoma counter for the local fleets and owner-operators who can't afford a truck sitting because of a $200 plastic tank. Same-day pickup if you're local, and we ship it out same day nationwide if you're not.
Comes with our standard 6+ month warranty. If it shows up cracked from shipping or isn't right for your application, we deal with it — no hassle, no runaround.
One more thing worth checking while you've got the old tank out: look at the low-coolant sensor and cap if your truck uses one. Cheap parts to replace while you're already in there, and it saves you a second trip.
A0525263005 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to A0525263005. 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 |
|---|---|
| Freightliner OE | A0533118000, A0525263003 |
| Automann | 575.1073 |
| Freightliner (OEM) | A05-25263-007 |
| Alliance | N20 A0525263007 |
Frequently asked questions
Does A0525263005 fit my 2015 Cascadia?
Probably, but confirm it by the number stamped or molded on your old tank, or pull your VIN and have us check it against the build sheet. Freightliner shuffled this part a few times across the Cascadia run, so 'probably' isn't good enough to skip that step.
Is this the same as the Automann 575.1073?
They cross-reference to the same tank — same mounting footprint, same capacity — but Automann's is an aftermarket-built version, not a Freightliner-branded part. Fit is the same as far as we've seen; just confirm your old tank's number matches this group before ordering.
My M2 has a coolant tank that looks a little different — will this work?
Maybe. M2s ran a couple different cooling packages depending on engine and spec, so the tank shape and mounting can vary more than on the Cascadia. Don't guess on this one — check the old part number or 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.