Does this fit my Ram 6.7L Cummins?

It is designed for Ram trucks with the 6.7L I6 Cummins turbo diesel. Check your model year and engine before ordering, since the housing changed across generations.

Is this the same as the factory filter?

Yes. It is the genuine Mopar part number 68157291AA, the engine-mounted primary filter with an integrated water separator.

What micron rating does it have?

Two-stage filtration: a 5-micron outer layer and a 3-micron inner layer of NanoNet synthetic media.

Do I need to drain the water separator?

Yes. The cartridge includes a water separator, and the housing drain should be used between filter changes as the owner's manual describes.

Can I use it on a different diesel engine?

No. It is built for the 6.7L Cummins fuel system and is not a universal filter.

The cartridge fuel filter element itself. Seals or housing parts, if needed, are separate.

Where is the Mopar 68157291AA Fuel Filter MO-291 cheapest?

At Amazon, for $13.56, 87% under what the other stores charge, as of our latest check.

Where can I buy the Mopar 68157291AA Fuel Filter MO-291?

16 stores we checked sell it, including Torque Treasure, Peakline Performance, Amazon, eBay, Partsgeek.com.

Mopar 68157291AA Fuel Filter MO-291

Best price now

$13.56at AmazonChecked 1 h ago

87% under what the other stores charge

Compared across 16 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

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What reviewers say

Owners of 6.7L Cummins Rams generally treat this as the safe factory choice, praising fit and filtration and noting it matches the original element. Some object to the higher cost versus aftermarket filters and to the short service interval.

What people mention

FitPraisedOwners say it drops into the factory housing with no modification.
FiltrationPraisedReviewers credit the two-stage media with keeping the fuel system clean.
ValueCriticisedSome owners say aftermarket filters do the job for less money.
Service intervalMixedOwners note it must be changed on the factory schedule, which comes around often.

About the Mopar 68157291AA Fuel Filter MO-291

The Mopar 68157291AA (MO-291) is a genuine OEM fuel filter for Ram trucks with the 6.7L Cummins turbo diesel engine. It is a cartridge-style filter with an integrated water separator that traps and removes water from diesel fuel. It is made to meet or exceed original equipment specifications for fit, form and function.

The filter uses NanoNet synthetic media with two filtration stages. The outer layer filters to 5 microns and the inner layer to 3 microns. It is built to withstand high fuel pressures and harsh operating conditions.

It is a direct replacement for the factory-installed filter and drops into the fuel filter housing under the hood on the driver's side of the engine bay. On 2013 and newer trucks, a second fuel filter is mounted on the frame rail near the fuel tank, and both filters should be replaced at the same time. Verify fitment with your vehicle's VIN or owner's manual.

Part number

68157291AA (MO-291)

Filter type

Cartridge-style with integrated water separator

Filtration

Two-stage: 5-micron outer layer, 3-micron inner layer

Media

NanoNet synthetic media

Location

Engine-mounted, in the fuel filter housing under the hood on the driver's side

Engine

6.7L I6 Cummins turbo diesel