Description
FD-4625 Fuel Filter Element for 2017-2019 Ford 6.7L Powerstroke — OEM-Grade Replacement
The FD-4625 Fuel Filter Element is the direct OEM replacement for 2017, 2018, and 2019 Ford 6.7L Powerstroke diesel engines. This cartridge-style drop-in filter replaces Motorcraft FD-4625 (HC3Z-9N184-B & HC3Z-9N184-C) with equivalent 10-micron filtration performance at a fraction of dealer pricing. Precision-engineered for the second-generation 6.7L fuel system, this filter protects your high-pressure CP4.2 injection pump from water and particulate contamination.
Second-Gen 6.7L Fuel System: What Changed in 2017
For the 2017 model year, Ford redesigned the 6.7L Powerstroke fuel filter housing from the earlier spin-on design (FD-4615) to a cartridge-style system. The FD-4625 drops into a permanent canister mounted on the driver-side frame rail, using a replaceable element instead of a disposable canister. This design improves serviceability and reduces waste — but it also means you cannot use 2011-2016 spin-on filters in a 2017+ truck. Make sure you're ordering the correct filter type.
Key Features
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10-Micron Filtration: Captures 99% of particles at 10 microns, matching OEM HC3Z-9N184-B specifications for reliable CP4.2 pump protection.
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Exact OEM Fit: Precision-molded end caps and O-ring grooves ensure a leak-free seal inside the factory filter housing — no modifications needed.
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Complete Kit: Includes filter element + replacement housing O-ring. Everything you need for a standard service.
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IATF 16949 Certified: Manufactured under automotive quality management standards, delivering OEM-equivalent reliability at aftermarket pricing.
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Extended Service Life: Rated for 22,500-mile service intervals under normal driving conditions (15,000 miles for severe duty/towing).
Compatibility / Fitment
| Year |
Make |
Model |
Engine |
| 2017-2019 |
Ford |
F-250 Super Duty |
6.7L Powerstroke V8 Diesel |
| 2017-2019 |
Ford |
F-350 Super Duty |
6.7L Powerstroke V8 Diesel |
| 2017-2019 |
Ford |
F-450 Super Duty |
6.7L Powerstroke V8 Diesel |
| 2017-2019 |
Ford |
F-550 Super Duty |
6.7L Powerstroke V8 Diesel |
Not compatible with 2011-2016 6.7L (uses FD-4615 spin-on) or 2020+ 6.7L (uses FD-4631).
Technical Specifications
| Part Number |
FD-4625 |
| OEM Cross-Reference |
HC3Z-9N184-B, HC3Z-9N184-C, Motorcraft FD-4625 |
| Superseded From |
FD-4624 (improved media in FD-4625 — backward compatible) |
| Filter Type |
Cartridge Element (drop-in) |
| Filtration Rating |
10 Micron Nominal |
| Service Interval |
22,500 miles (every 3rd oil change) — 15,000 miles severe duty |
| Installation Location |
Driver-side frame rail, under driver door area |
| Housing Cap Torque |
25 Nm (18 ft-lbs) |
⚠️ Before You Start: The fuel filter return line connector (HC3Z-9A564-A) on 2017+ 6.7L Powerstroke models is a known failure point. If your truck cranks excessively before firing, replace this $15 connector alongside your filter — we stock it separately.
Installation Steps
- Locate fuel filter housing on driver-side frame rail, just behind the front wheel
- Drain water from the separator using the 6mm hex drain plug — catch fuel in a container
- Unscrew the housing cap using a 36mm socket — do NOT use a strap wrench (may crack the cap)
- Remove old cartridge element — note the orientation before pulling it out
- Install the new FD-4625 element — it only seats correctly in one direction
- Replace the housing O-ring with the new one included in this kit
- Reinstall cap and torque to 25 Nm (18 ft-lbs)
- Cycle ignition to ON (do NOT start) for 30 seconds, then OFF — repeat 6-8 times to prime the system
- Start engine and inspect for leaks at the cap and drain plug
Why Choose iFJF FD-4625 Over OEM?
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Same 10-Micron Protection — No compromise on filtration. Your CP4.2 pump is too expensive to gamble on cheap filters.
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50-60% Less Than Dealer Pricing — Motorcraft FD-4625 runs $60-80 at Ford dealers. Get the same protection for less.
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Coast-to-Coast US Inventory — Ships from US warehouses. No 2-week AliExpress wait times.
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12-Month Warranty — Every iFJF filter is backed by our hassle-free replacement guarantee.
Frequently Asked Questions
Q: FD-4625 vs. FD-4624 — what's the difference and which one do I need?
A: FD-4624 was the original part number when the second-gen 6.7L launched in 2017. Motorcraft superseded it with FD-4625, which uses improved filtration media for better water separation and longer service life. FD-4625 is 100% backward-compatible with all 2017-2019 applications. If you're seeing FD-4624 referenced, the FD-4625 in this listing is the correct current replacement.
Q: Will this fit my 2017/2018/2019 F-250 or F-350?
A: Yes — the FD-4625 fits all 2017, 2018, and 2019 Ford F-250, F-350, F-450, and F-550 Super Duty trucks with the 6.7L Powerstroke V8 diesel engine. It does NOT fit 2011-2016 models (they use spin-on FD-4615) or 2020+ models (they use FD-4631). Always confirm your model year before ordering.
Q: How often should I replace the fuel filter on my 6.7L Powerstroke?
A: Ford recommends every 22,500 miles (typically every 3rd oil change at 7,500-mile intervals). If you tow heavy, idle frequently, run biodiesel blends above B5, or operate in dusty conditions, replace every 15,000 miles. Always drain the water separator at every oil change regardless of mileage.
Q: Why is my 2017+ 6.7L hard to start after sitting overnight?
A: The #1 cause is a cracked fuel return line connector (HC3Z-9A564-A) allowing air into the system and fuel to drain back to the tank. Replace this $15 plastic connector before replacing injectors or high-pressure pumps. Second most common cause: a worn housing cap O-ring letting air in — always replace the O-ring with every filter change.
Q: Can I reuse the old O-ring if it looks fine?
A: No. The housing cap O-ring is a one-time-use seal. Even if it looks fine, heat cycling causes micro-compression that prevents a proper seal on reinstallation. A leaking O-ring can cause extended cranking, rough idle, and eventual CP4.2 damage from air in the fuel system. Every FD-4625 kit includes a new O-ring — use it.
Q: What tools do I need to change this filter?
A: A 36mm socket (or 1-7/16" SAE) for the housing cap, a 6mm hex key (Allen wrench) for the drain plug, a drain pan to catch fuel, and shop rags. No special tools required. Most DIYers complete the job in 20-30 minutes.
