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Genuine Fleetguard FS20172 Fuel Water Separator (Pack of 6) | OEM Diesel Filter for 2019+ Cummins 6.7L
Description
Maximize uptime with the ultimate bulk protection. For the 6.7L Cummins owner who never misses a service, this Pack of 6 Fleetguard FS20172 filters keeps factory-spec protection on the shelf at all times. As the original equipment for Cummins, Fleetguard's Stratapore™ media is the only filtration technology designed to keep your high-pressure common rail system free of the emulsified water that destroys injectors.
Technical Significance
Fleet maintenance is about preventing catastrophic failure before it starts. The FS20172 is a Cummins-engineered component — Fleetguard (a Cummins company) uses proprietary multi-layered media with superior particle-holding capacity over standard paper. This 6-pack ensures every fuel service across the next 90,000 miles is handled with the same precision the engine had the day it left the factory.
OEM vs. Aftermarket Comparison
| Feature | Genuine Fleetguard FS20172 (This Product) | Generic Aftermarket Packs |
|---|---|---|
| Media Type | Stratapore™ multi-layer synthetic | Single-layer cellulose (paper) |
| Water Removal | 95%+ emulsified water removal | Often under 70% efficiency |
| Service Life | Full 15,000-mile capacity | Prone to plugging prematurely |
| Pump Safety | Optimized for Cummins lift pumps | Can cause vacuum restriction |
Package Contents
- (6) Genuine Fleetguard FS20172 fuel water separators
- (6) New sealing O-rings (pre-packaged with each filter)
- Factory bulk packaging for cleanliness and authenticity
Vehicle Compatibility
A direct OEM replacement for these Cummins-powered applications:
- Ram 2500 / 3500 / 4500 / 5500: 2019, 2020, 2021, 2022, 2023, 2024+
- Cummins engine series: B6.7, QSB6.7 (Tier 4 Final)
Interchange / Cross-Reference: Mopar 68436631AA, 68436631AB, Cummins 5526401.
This is the frame-mounted separator. For 2019+ Ram models, always pair with the engine-mounted NanoNet filter (FF5971NN) for 100% protection.
Service Indicators
- "Water in Fuel" warning that keeps coming back
- Cold-weather prep against fuel gelling and waxing
- Bulk service: consistent performance across a whole fleet
- High mileage: 30,000+ miles a year and you want a lower cost-per-mile
Not sure it fits? Send us your VIN or Engine Serial Number (ESN) and we'll confirm 100% compatibility before you buy. Brand new, factory-sealed, and shipped fast.
Recently viewed
Customer Reviews
5.0 / 5
★★★★★
Based on 2 reviews
-
★★★★★ Perfect for 2019+ owners who put on miles fast
I drive my 2020 Ram 3500 for work — averaging 35k miles a year. The 6-pack pays for itself vs buying singles. These are the real Fleetguard FS20172 filters with Stratapore media. My water-in-fuel warning has not come on once in 70k miles since I switched to OEM-only filtration.
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★★★★★ Paired perfectly with the FF5971NN — highly recommend both
My dealer told me to always replace both filters at the same time. Bought the FS20172 6-pack and the FF5971NN 6-pack together. Service takes about 30 minutes total and my '22 Ram runs flawlessly. No fuel codes, no warnings, great fuel economy. Stock up and don't overthink it.
Frequently asked questions
How do I know this part fits my vehicle?
Every listing includes a full compatibility list by make, model, year, and engine. If you're unsure, send us your VIN or Engine Serial Number (ESN) via the chat or contact page and we'll confirm fitment before you order.
Are these genuine OEM parts or aftermarket alternatives?
Every product we sell is 100% genuine OEM — factory-sealed and sourced directly from the manufacturer or authorized distributors. We do not sell aftermarket substitutes or white-box alternatives.
Do I need a professional to install these parts?
Most fuel filters and basic maintenance components are straightforward DIY installs with basic hand tools. We recommend consulting your vehicle's service manual for torque specs and bleed procedures. For ignition components and TPMS sensors, a relearn procedure may be required — see the product description for details.