What This Filter Does
A4700903151 is a spin-on style diesel fuel filter built from paper media in a plastic housing, measuring roughly 12 in long, 8 in wide, and 7 in tall as packaged. It sits in the fuel path ahead of the high-pressure side and catches the abrasives, asphaltenes, and water that destroy injectors.
The media is multi-stage with water separation. That matters on modern common-rail Detroit engines, where injector tolerances are tight enough that a slug of water or a few microns of grit will score a nozzle. Replacing a filter is cheap work. Replacing a set of injectors is not.
The threaded steel cap seals on a nitrile O-ring. On heavy-duty service the O-ring is what keeps vibration from working the joint loose and pulling air into the fuel. Always fit the new seal that comes with the filter — do not reuse the old one, even if it looks fine.
Why These Numbers Cross
A4700903151 and P551063 describe the same filter element: same housing interface, same thread and seal, same media stage arrangement, same nominal filtration. One number is the factory service reference, the other is an aftermarket catalog number covering the same application. Different catalogs, same physical part.
Filter numbers cross cleanly when the housing geometry and the seating dimensions match. Fuel filters are defined by the housing they thread into, not by the engine badge, so a single element can appear under several brand numbers. PartStop lists other manufacturers' numbers for identification only — we are not affiliated with, endorsed by, or authorized by any OEM.
A cross-reference is a starting point, not a fitment promise. Confirm by VIN, or pull the old filter and read the number printed on the can before you order a case.
Symptoms And What To Check
A plugging fuel filter shows up as power loss under load, hard hot starts, and a rising pressure drop across the filter housing. Drivers usually report it as a truck that pulls fine empty and dies on a grade. Fuel economy slides before anything sets a code.
Before you swap, drain the water separator bowl and look at what comes out. Black sludge points at tank contamination that will kill the new filter in weeks. Clear water means a tank or cap issue. Fix the source, or you will be back under the hood on the next service interval.
A4700903151 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to A4700903151. 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 |
|---|---|
| Aftermarket | P551063 |
Frequently asked questions
Is P551063 the same filter as A4700903151?
Yes, they reference the same element with the same housing interface, seal, and media. The numbers come from different catalogs covering the same application. Verify against the number stamped on the filter you are pulling off, or confirm by VIN, before committing to a bulk order.
Does this filter fit DD13 and DD15 engines?
It is listed for DD13, DD15, and DD16 applications, including Cascadia and Century chassis. Fuel filter housings change across build dates, so treat that as a starting point. Confirm by VIN or read the number off the old filter.
Do I need to prime after changing this filter?
Yes. Fill the new filter with clean diesel if the housing design allows it, then work the hand primer until firm before cranking. Skipping the prime makes the engine crank long and pulls air into the high-pressure side, which is hard on the pump.
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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.
Engine parts hubs
This part runs on these engines — browse the full aftermarket parts range for each.
More cross-reference guides
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