What This Filter Is and Where It Goes
This is a spin-on/cartridge style full-flow oil filter built for the Detroit DD13 and DD15 diesel platforms. Those engines have run in Freightliner Cascadias basically the whole production run, 2008 through current trucks, so there's a lot of these on the road and a lot of filter changes happening every day.
The filter housing, thread pitch, and media are matched to what Detroit spec'd for these engines - it's not a generic filter, it's built to the dimensions and flow rate the DD13/DD15 oil system needs. Wrong micron rating or wrong bypass valve setting and you're either starving the engine or letting junk through, neither one is good.
How the Cross Numbers Line Up
The A4731800909 cross-references to Baldwin's P551005, Fleetguard's LF17511, and Mann's 25.156.00. These aren't random matches - all four manufacturers build to the same physical spec because they're filling the same OE application. Thread size, gasket diameter, and filter height all have to match or the filter either won't seal or won't fit the housing at all.
Where guys get burned is assuming every filter that looks like it fits actually flows right or seals right. Micron rating and bypass valve pressure aren't always identical across brands even when the physical dimensions match. That's why we tell people to check the number stamped on the old filter core or housing before ordering - don't go off memory or a parts book from five years ago.
If your truck's had any engine swaps, model year running changes, or you're not 100% sure which spec DD13/DD15 you've got under the hood, pull the VIN and we'll run it or you run it yourself through Detroit's lookup. Takes two minutes and saves you a return trip.
Ordering From PartStop
We keep these in stock at the Tacoma counter for guys running local reefer or drayage who need a filter change today, no waiting on a warehouse three states away. Walk in, we pull it, you're back on the road.
For everybody else we ship nationwide, usually next-day to most of the Pacific Northwest and within a couple days coast to coast. Comes with our standard 6+ month warranty - if it's defective or doesn't match up to your old part number, call us and we'll sort it.
At $39.99 it's priced where a fleet doing PMs on multiple trucks isn't going to blink, but we still recommend double-checking the number before you order a case of them.
A4731800909 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to A4731800909. 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 | P551005, LF17511, 25.156.00 |
Frequently asked questions
Does A4731800909 fit my 2015 Cascadia with a DD15?
Most likely yes, but confirm by checking the number on your current filter or pulling your VIN and running it against Detroit's parts lookup. DD15 running changes happened across those model years and we'd rather you check than end up with a filter that doesn't seal right.
Is this the same as the Fleetguard LF17511?
They cross-reference to the same physical spec - same thread, same gasket size, same basic fit for DD13/DD15 applications. Fleetguard and the aftermarket numbers aren't identical parts, but they're built to fit the same housing. Match the number off your old filter to be sure.
Can I run this filter on a DD13 if my last one was a Baldwin P551005?
Yeah, that's exactly the kind of cross this filter's built for. P551005 and A4731800909 are matched specs for the same engine family. Still worth checking the tag on the filter core before you order a bunch of them, especially if you're stocking up for a fleet.
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.