What You're Actually Buying
This is a spin-on fuel filter, the kind that sits in the secondary or primary fuel filter housing on Detroit Diesel-powered Freightliner Cascadias, roughly 2008 through 2021 depending on engine and build date. It's doing the dirty work keeping water and junk out of your injectors, so it's not a place to cheap out or guess.
Detroit changed part numbers on this filter more than once over the years without changing much about the filter itself, which is why you'll see A0000903651, P550854, and P551011 all pointing at the same physical part. Baldwin's PF9804 and Fleetguard's FS19915 are the aftermarket world's version of the same filter, built to the same micron rating and thread.
We stock this because it's a high-turnover number for us. If you run a few Cascadias in your yard, keep a couple on the shelf — this isn't the filter you want to be waiting on.
Reading the Cross-Reference Numbers
When you see this many brands cross-referencing to one filter — Hengst, Eco Filter, Hastings, plus the Detroit and Fleetguard numbers — it usually means the housing, thread pitch, gasket seal diameter, and micron rating all line up close enough to work. That's the case here. But 'close enough' on paper still means you should check the old filter's number and compare thread and gasket seal size before you thread in a new one.
The main things that trip guys up on fuel filters: seal groove diameter and overall filter height. Get either wrong and you'll get a filter that threads on fine but leaks or doesn't seat right in the housing, and now you've got fuel on the ground and a comeback. If your old part shows P550854, P551011, A0000903651, FS19915, or PF9804, this filter is built to interchange with all of those.
Always confirm against your VIN or the number physically on the housing or old filter before you order. Detroit's numbering isn't always consistent year to year even within the same Cascadia generation, so don't go off model year alone.
Getting It From Us
We're in Tacoma and if you're local, this is a same-day counter pickup or same-day will-call item — no waiting around on freight for a filter you need to change today. We ship nationwide too, so if you're not near us, it still shows up fast.
This filter carries our standard 6+ month warranty. If something's actually wrong with the part, we'll make it right — no runaround.
A0000903651 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to A0000903651. 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 |
|---|---|
| Hengst | E497KPD543 |
| Eco Filter | FX41011 |
| Hastings | FF1293 |
| Aftermarket | FS19915, P551011, 26.190.00, P550854 |
Frequently asked questions
Does A0000903651 fit my 2015 Cascadia?
Likely, but confirm by pulling the number off your old filter or checking your VIN against the engine and fuel system spec. Detroit used a few different filter numbers across Cascadia years, so don't assume by model year alone.
Is this the same as the Hengst E497KPD543?
It cross-references to it — same fit, thread, and micron rating as far as our records show. Still worth checking your old filter's number against ours before ordering, especially if your truck's had any fuel system work done.
What's the difference between P550854 and P551011?
For this application, nothing that affects fit — they're different part numbers Detroit and the aftermarket have used for the same physical filter. If your old one has either number, this is a direct replacement.
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.