What This Filter Actually Is
This is a spin-on fuel filter built for the DD13/DD15 fuel system used in the Freightliner Cascadia from '08 up through the 2021 body style. It's a final-stage filter, so it's doing the fine filtration right before fuel hits the injectors - not the water-separator stage up front. Get this one wrong and you're looking at injector damage down the road, not just a filter light.
Detroit Diesel stamped it as A0000903651, but the same filter got sold under Freightliner's parts network and cross-referenced into the aftermarket almost immediately because of how many trucks run this engine combo. FS19915, PF9804, P551011, and P550854 are all numbers you'll see on the shelf or in a catalog pointing at this exact filter.
Why All These Numbers Point to One Filter
Fuel filters cross-reference based on thread size, gasket dimensions, micron rating, and overall housing length - not just because two companies decided to use the same number. FS19915 is Fleetguard's number, PF9804 is WIX/Napa, P551011 and P550854 are Donaldson. Hengst's E497KPD543, Hastings' FF1293, and Eco Filter's FX41011 all land in the same spec range. They didn't copy each other - they all built to the same fitment because that's what the DD13/DD15 fuel system calls for.
The catch with fuel filters, more than most parts, is micron rating. Some of these numbers are close but not identical on filtration efficiency, and Detroit's ECM setup is picky about fuel pressure and contamination limits. Pull the old filter and check the number stamped on the housing before you order - don't go off memory or off what the truck next to you is running.
Ordering From PartStop
We keep this filter in stock in Tacoma, and if you're local, same-day pickup is normal - no waiting on a warehouse transfer. Ship nationwide too, so if you're running a Cascadia out of state, it still gets to you fast.
Confirm by VIN or by the number off your old filter before you check out. We back it with the standard 6+ month warranty, but a warranty doesn't fix a fuel system that got the wrong micron rating - so double check first, order second.
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 with a DD15?
Likely yes, but confirm with your VIN or pull the old filter and check the stamped number. Detroit ran a few filter housing variations across the DD13/DD15 lineup over the years, so don't assume by model year alone.
Is this the same filter as the Hengst E497KPD543?
They cross-reference to the same fitment and micron spec, yes. Hengst builds to the same dimensional and filtration requirements as the Detroit number, but always verify against your old part before ordering if you're switching brands.
What's the difference between FS19915 and P551011 - do I need to match the brand I've been running?
No, you don't need to stick with one brand - FS19915 is Fleetguard, P551011 is Donaldson, and both cross-reference to A0000903651. What matters is matching the filter to your engine's fuel system spec, not staying loyal to a filter brand.
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.