Which Fuel Filter Fits My RAM 2500 or 3500? Complete Mopar Part Number Guide by Year (2013–2024)

Which Fuel Filter Fits My RAM 2500 or 3500? Complete Mopar Part Number Guide by Year (2013–2024)

You typed your year and model into a parts website, and three different Mopar fuel filter part numbers came back. 68197867AA, 68197867AB, 68436631AA — they all look like the same filter online, but they're not all correct for your truck. Ordering the wrong one means a return, a delayed service, and an engine running on a clogged filter longer than it should.

The 6.7L Cummins in your RAM 2500, 3500, 4500, or 5500 uses two fuel filters — an engine-mounted primary filter and a frame-mounted fuel water separator — and the correct water separator part number changed twice between 2013 and 2024. This guide eliminates the guesswork.

What Is the Difference Between 68197867AA and 68197867AB?

They're the same filter. The 68197867AB is a Mopar part number revision that superseded the original 68197867AA. Both are the frame-mounted fuel water separator for 2013–2018 RAM trucks with the 6.7L Cummins. If your parts search returns either number, both will fit identically — the AB simply replaced the AA in Mopar's catalog as an updated listing, not a design change.

The engine-mounted primary fuel filter across these same years is 68157291AA. This filter uses Cummins Filtration's NanoNet dual-stage media, filtering to 3 microns at 95% efficiency. It's the same filter regardless of whether you drive a 2013 RAM 2500 or a 2018 RAM 3500.

Which Fuel Filters Fit a 2013–2018 RAM 6.7L Cummins?

You need two filters for every fuel service:

Engine-mounted primary fuel filter: 68157291AA. This is the NanoNet cartridge that sits in the housing under the hood. It handles fine-particle filtration down to 3 microns and is the more critical of the two filters for injector protection.

Frame-mounted fuel water separator: 68197867AB (or the older listing 68197867AA). This filter separates water from diesel fuel before it reaches the engine. Water in a Cummins common-rail injection system causes catastrophic damage — corrosion, scoring, and eventual injector failure.

The Mopar fuel filter set (68197867AB + 68157291AA) includes both filters in one package. This covers every 2013–2018 RAM 2500, 3500, 4500, and 5500 with the 6.7L Cummins — whether you own a 2014 RAM 2500, a 2015 RAM 3500, a 2016 RAM 2500, or a 2018 RAM 2500.

For a complete Mopar diesel maintenance service that includes the oil filter, the oil and fuel filter kit (5083285AA + 68197867AB + 68157291AA) bundles all three OEM filters into a single ram diesel filter set. This is the most cost-effective way to handle a full 2013–2018 RAM Cummins service interval.

Which Fuel Filters Fit a 2019–2024 RAM 6.7L Cummins?

The engine-mounted primary fuel filter remains 68157291AA — the same NanoNet cartridge used since 2013. However, the frame-mounted fuel water separator changed to 68436631AA starting with the 2019 model year. The 68197867AB will NOT fit 2019 and newer trucks. This is the most common ordering mistake owners make when upgrading from a 2018 to a 2020 or 2021 RAM.

The Mopar fuel filter kit (68157291AA + 68436631AA) is the correct set for every 2019–2024 RAM 2500, 3500, 4500, and 5500 with the 6.7L Cummins. This covers the 2020 RAM 2500, 2021 RAM 2500, 2022 RAM 3500, 2023 RAM 3500, and 2024 RAM 2500.

For the full service bundle with oil filter included, the complete fuel and oil filter kit (68157291AA + 68436631AA + 5083285AA) handles your entire 6.7 cummins maintenance filter kit in one order.

Which Oil Filter Fits Every RAM Cummins?

This is the simplest part of RAM Cummins maintenance. The Mopar 5083285AA oil filter (MO-285) fits every RAM Cummins ever made — both the 5.9L and the 6.7L, from 1989 through 2024. Whether you drive a 5.9 Cummins from the early 2000s or a 2024 RAM 3500 with the 6.7L, this is your oil filter.

The Fleetguard cross-reference for this filter is the LF3972 (cellulose media) or the LF16035 Stratapore (synthetic media upgrade). Since Mopar diesel filters are manufactured by Fleetguard — Cummins' own filtration subsidiary — both the Mopar and Fleetguard versions are genuine OEM parts at different price points.

What About the Filter Most RAM Owners Forget?

The Fleetguard CV52001 crankcase ventilation filter is the third filter on your 6.7L Cummins that doesn't show up in any