The precise engine air filter part number for a 2021 Ford Explorer ST isn't a single universal code; it depends on the engine variant and production revision. The Explorer ST uses the 3.0L EcoBoost V6, and Ford’s official parts catalog assigns a VIN-specific part number that you should verify via FordParts.com or a dealer.
To understand this question in more depth, technicians and owners typically consult the official parts catalog to ensure the correct filter is ordered, since part revisions and regional specifications can alter the exact number. This article outlines how to locate the exact number for your vehicle and where to source it.
Know what you’re ordering
Before chasing a number, note that there are separate filters in the intake system (engine air filter) and the cabin air filter. This article focuses on the engine air filter for the 3.0L EcoBoost engine in the Explorer ST.
How to locate the exact part number
To determine the exact part number for your SUV, follow these steps:
- Gather your vehicle’s VIN from the dash plaque or driver-side door sticker.
- Visit FordParts.com or your local Ford dealer’s parts catalog and enter the VIN to pull the precise engine air filter replacement part number for your build.
- Compare the catalog listing to the actual filter inside your air box by checking the part number printed on the filter or its packaging; some OEM filters have the number molded or labeled on the frame.
- If you can’t locate the number online, contact the dealer’s parts department with your VIN and request the engine air filter for the 2021 Explorer ST with the 3.0L EcoBoost.
Using the VIN-based lookup ensures you receive the exact OE filter for your Explorer ST, even if there are service bulletins or regional variations that change the part number.
Where to buy and how to verify
Reliable sources for confirming and purchasing the correct engine air filter include:
- FordParts.com (VIN-based lookup for precise OE parts)
- Motorcraft official catalog and authorized retailers
- Authorized Ford dealership parts counter
- Owner’s manual or service bulletins that reference the correct part for the 3.0L EcoBoost Explorer ST
Requesting the part by its exact number from these sources helps ensure compatibility and avoids ordering the wrong filter due to revisions or regional differences.
Summary
For the 2021 Ford Explorer ST, there isn’t a single, universal engine air filter part number. The correct part is VIN-specific and tied to Ford’s official catalog for the 3.0L EcoBoost engine. To obtain the exact number, perform a VIN-based lookup on FordParts.com or consult a Ford dealer’s parts department, and verify the number against the physical filter housing. This approach minimizes the risk of ordering an incorrect filter and keeps maintenance on track.
What part number is the air filter on a Ford Explorer?
L1MZ-9601-A
Explorer; 3.3L Hybrid. Police Cleaner, LITER - OEM Ford Part # L1MZ9601A (L1MZ-9601-A)
What oil is best for a Ford Explorer?
Recommended Ford Explorer Oil Type
Though model years can vary, the most recent Ford Explorer SUVs require either SAE 5W-30 or SAE 0W-30 full-synthetic oil for their engines.
What is the air filter number on a 2021 Ford Explorer?
Motorcraft – Original Equipment Engine Air Filter: Standard Duty, Manufactured To Meet Ford's Standards (Part No. FA-1616)
What are the common 2021 Explorer ST problems?
Transmission issues are among the most frequently reported problems with 2021-2025 Ford Explorers. These issues include harsh and jerky shifting, delayed gear engagement, and transmission slipping out of gear.