Ford moved the cabin air filter on the 14th-gen F-150 out from behind the glovebox and into the HVAC intake under the passenger-side cowl vent panel. That means no contortions under the dash, but it also means popping the rear weatherstrip and a handful of push-pin clips at the base of the windshield. Nothing here needs a lift, a torque wrench or a scan tool — a trim tool, a small screwdriver and a 7 mm nut driver cover it.
The job is identical on the 2.7 EcoBoost, 3.5 EcoBoost, 5.0 V8 and PowerBoost hybrid, since the HVAC box is shared. The two things people get wrong: installing the filter with the airflow arrows upside down, and not vacuuming the cowl tray first, so all the leaf litter that was sitting on top of the old filter drops straight into the blower. Also expect to break a push-pin clip or two — buy a cheap assortment before you start.
| Item | Type | |
|---|---|---|
| Plastic trim removal tool set Nylon pry/push-pin puller set Pops the cowl panel push-pin clips and pries the panel up without cracking the plastic or scratching paint. | Required | shop |
| Flat-blade screwdriver Small, 3-4 mm blade Lifts the centers of the cowl push-pin retainers and releases the filter cover tabs. | Required | shop |
| Socket / nut driver 7 mm, 1/4 in drive (8 mm on some builds) Removes the small cowl panel and filter access cover screws where fitted. | Required | shop |
| Ratchet 1/4 in drive, with 2-3 in extension Drives the cowl and cover screws in the tight space along the windshield. | Required | shop |
| Socket for wiper arm nut 15 mm (verify on your truck; some use 13 mm) Only needed if the passenger wiper arm blocks cowl panel removal on your build. | Recommended | shop |
| Wiper arm puller Small two-jaw wiper arm puller Frees a seized wiper arm from the splined shaft without bending it, if the arm must come off. | Recommended | shop |
| Flashlight or headlamp LED The filter housing sits deep under the cowl and is hard to see. | Recommended | shop |
| Shop vacuum Wet/dry with crevice nozzle Clears leaves, pine needles and grit out of the cowl tray and filter box before fitting the new filter. | Recommended | shop |
| Cabin air filter Motorcraft FP-88 / Ford ML3Z-19N619-A (verify fitment by VIN) The replacement element; carbon-activated aftermarket versions also fit. | Parts | shop |
| Spare push-pin retainers Ford cowl panel push-pin clips, assorted Old clips often break or lose their centers when removed. | Consumables | shop |
| Nitrile gloves Disposable Used filters hold mold, pollen and rodent debris. | Safety | shop |
| Dust mask N95 or better Keeps you from breathing the dust that falls off a heavily loaded filter. | Safety | shop |
No tool differences between the 2.7 EcoBoost, 3.5 EcoBoost, 5.0 V8 and 3.5 PowerBoost — the cowl and HVAC intake are the same on all of them. Only variation is build-date related: some trucks use 7 mm screws on the cowl/cover and some are clip-only, and a few early 2021 units shipped with the filter slot empty.
| Cowl panel / filter cover screws | Snug by hand only, roughly 2 ft-lb (3 Nm) — plastic into plastic, do not overtighten |
| Windshield wiper arm nut (if removed) | verify in the service manual |
The under-cowl passenger-side location and clip-and-small-screw fastening are correct for the 2021-2024 F-150 across all engines, but screw sizes vary slightly by build date (7 mm or 8 mm) and the wiper arm nut size should be confirmed on your truck before buying a socket.
Under the hood, at the base of the windshield on the passenger side, inside the HVAC intake beneath the plastic cowl vent panel. It is not behind the glovebox like many other trucks.
Motorcraft FP-88 (Ford part ML3Z-19N619-A) is the common OE filter, with carbon-activated aftermarket equivalents available. Confirm fitment by VIN, since Ford has superseded part numbers across the generation.
Some early 2021 builds left the housing empty or fitted with a blank. If you open the cover and find nothing, that is not a mistake — install the correct filter and it will seal and work normally.
Usually no — the passenger cowl panel lifts out after the weatherstrip and push-pin clips are removed. On some trucks the wiper arm sits in the way; if so, mark its position, remove the nut (15 mm on most, verify) and pull it with a wiper arm puller.