Ford bulletin 24N10 S1
What it saysCertain 2020-2022 Model Year Explorer Police Interceptor Utility (PIU) Vehicles Engine Block Breaches This program provides a no-cost, one-time repair (if needed) to the engine long-block for 10 years of service… NHTSA’s full summary ↓
Ford filed this with NHTSA as a manufacturer communication dated Jul 14, 2025, received Aug 1, 2025, about the engine. It names 3 model years (2020–2022). A manufacturer communication is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationCertain 2020-2022 Model Year Explorer Police Interceptor Utility (PIU) Vehicles Engine Block Breaches This program provides a no-cost, one-time repair (if needed) to the engine long-block for 10 years of service or 150,000 miles from the warranty start date of the vehicle, whichever occurs first.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 24N10 S1 | Other | Jul 14, 2025 | 11021197 | PDF, 894 KB |
What the document itself lists
The manufacturer titles it “Customer Satisfaction Program 24N10 – Supplement #1”.
Parts the bulletin names — the first 40 it lists
| Part number | Description | Qty | Find it |
|---|---|---|---|
| W714265-S442 | NUT-.M10.HF.SPL | 8 | eBay Motors → |
| W701706-S430 | NUT.M8.HEX.FLNG.P/T.MTL | — | eBay Motors → |
| W712244-S300 | STUD.M8X16+M8X25.HX.PIL | 10 | eBay Motors → |
| 7T4Z-6379-AA | BOLT – HEX.HEAD (ICE ONLY) | — | eBay Motors → |
| JR3Z-6379-A | BOLT – HEX.HEAD (FHEV ONLY) | — | eBay Motors → |
| 7T4Z-9439-D | GASKET – INTAKE MANIFOLD | — | eBay Motors → |
| 9L8Z-9J469-A | GASKET | — | |
| AA5Z-6714-A | FILTER ASY – OIL | — | eBay Motors → |
| AT4Z-8527-A | SEAL | — | eBay Motors → |
| BR3Z-8527-A | SEAL | — | eBay Motors → |
| JL3Z-9448-A | GASKET | — | |
| JL3Z-9E464-F | GASKET | — | |
| L1MZ-6006-D | SERVICE ENGINE ASY | — | eBay Motors → |
| L1MZ-8507-A | GASKET – WATER PUMP | — | eBay Motors → |
| SK4Z-9229-A | KIT – “O” RING | — | eBay Motors → |
| 7T4Z-8590-A | SEAL | — | eBay Motors → |
| W716300-S450B | NUT&WSHR.M12.HX.CON.PTM | 10 | eBay Motors → |
| W717521-S440 | NUT&WSHR.M16.HC.PTP.CON | 10 | eBay Motors → |
| W719326-S439 | BOLT AND WASHER ASY-HEX.HEAD | — | eBay Motors → |
| L1MZ-4382-B | BLT-RR.AX.TOR.ARM.COMPR | — | eBay Motors → |
| L1MZ-4382-D | BLT-RR.AX.TOR.ARM.COMPR | — | eBay Motors → |
| L1MZ-4382-C | BLT-RR.AX.TOR.ARM.COMPR | — | eBay Motors → |
| W520413-S440 | NUT.M8.HF | 8 | eBay Motors → |
| DS7Z-19B596-A | KIT.A/C.HOS.O/RG.SE | — | eBay Motors → |
| DL3Z-19B596-B | KIT.A/C.HOS.O/RG.SE | — | eBay Motors → |
| 9W7Z-19B596-A | KIT.A/C.HOS.O.RG.SE | — | eBay Motors → |
| W500214-S442 | BOLT.M6X20.HF.PIL | 8 | eBay Motors → |
| W520214-S440 | NUT.M12.HF.PTP | 10 | eBay Motors → |
| W715618-S437 | NUT.M10X1.HF.CB.PTM.SPL | 10 | eBay Motors → |
| W716375-S900 | BOLT.M10X45.TE.FLNG.SPL.AL | — | eBay Motors → |
| W719431-S439 | BOLT.M12X101.HF.PIL | 10 | eBay Motors → |
| W719511-S439 | BOLT.M12X1.5X55.HF.ADH | 10 | eBay Motors → |
| W721083-S439 | BOLT&WSHR.M12X56.HF.MAT.CNE | — | eBay Motors → |
| BB5Z-4B422-A | BL.FRT.WHL.DRV.I/BD.JT | — | eBay Motors → |
| CN1Z-7H424-B | SE.PTO.GR | — | eBay Motors → |
| L1MZ-00815-A | O/RG-SUSP.AIR.SPG.SOL.CTG | — | eBay Motors → |
| LB5Z-3B477-A | RET.ASY-FRT.AX.WHL.HB | — | eBay Motors → |
| W719608-S439 | STUD.M12X51+M12X67.TE.PIL | 10 | eBay Motors → |
| L1MZ-4421-B | BT-U/JT.SLP.YK | — | eBay Motors → |
| L1MZ-3B478-A | CLMP.FRT.AX.SLP.YK.BT | — | eBay Motors → |
Read by machine from the document NHTSA serves (12 pages), read Sep 30, 2026. A part number is shown only where it matches Ford’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 3 model years this bulletin names have filed 1,988 complaints with NHTSA since 2015. 234 of them name Engine — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
On the 2020 Ford Explorer, the 52 owners who gave an odometer reading for Engine reported it at a median of 30,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Catalytic converter and it was confirmed by independent service center my car only has 88k miles There is a catalytic converter recall on year 2020 but Ford refuses to do a recall for the year 2021 and I have another car that have the same catalytic converter problem with only 84k miles and it’s also 2021 and Ford refuses to do any work…
2021 Ford Explorer · Engine · filed with NHTSA Jul 31, 2026 · ODI 11754102
Purchased a 2020 Explorer on feb 11, noticed smoke from the hood right when I arrived home from the dealer, contacted them and they said it might be normal for a new vehicle to have some smoke in the beginning, later I noticed that the interior heat is only blowing cold air so I was about to take it to the nearest dealer to check it out…
2020 Ford Explorer · Engine · filed with NHTSA Feb 14, 2020 · ODI 11309159
4 days after purchase car started shutting off after cranking. Sometimes it would be just once and sometimes it could be up to 4 times within the first 1-2 min of attempted driving. It would re-crank easily each time but by the time you would reach for seatbelt, it would stall.
2022 Ford Explorer · Engine · filed with NHTSA Nov 29, 2022 · ODI 11495334
In depth: 2021 Ford Explorer engine problems → · 2020 Ford Explorer engine problems →
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the engine
Source: same model, same component group28 other manufacturer communications filed against the Ford Explorer under the same component group (engine), newest first. The eight newest are listed; the rest are on the Ford list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SSM 55228 | Service bulletin | Oct 8, 2026 | Some 2020-2026 Aviator/Explorer/F-150/Bronco/Ranger vehicles equipped with a 2.7L or 3.0L (non-diesel) engine may need the front engine cove… |
| SSM 55217 | Service bulletin | Oct 6, 2026 | Some 2020-2024 Explorer/Aviator vehicles equipped with 3.0L EcoBoost/hybrid engine may exhibit blue or black exhaust smoke on startup for th… |
| TSB 26-2349 | Service bulletin | Jul 31, 2026 | This bulletin supersedes 25-2415. Reason for update: To add production build dates of the right-side engine valve cover. Some of the vehicle… |
| 25B51 | Other | May 9, 2026 | Certain 2021-2024 Model Year Bronco, 2021-2024 Model Year Bronco Sport, 2020-2022 Model Year Corsair and Escape, 2016-2024 Model Year Explor… |
| SSM 54795 | Service bulletin | May 4, 2026 | Some 2021-2023 F-150 vehicles equipped with a 3.5L PowerBoost engine and 2020-2026 Explorer vehicles equipped with a 3.3L hybrid engine may… |
| SSM 54774 | Service bulletin | Apr 24, 2026 | Some 2024-2026 Explorer/Aviator/Police Interceptor Utility vehicles may exhibit an illuminated malfunction indicator (MIL) lamp with engine… |
| SSM 54756 | Service bulletin | Apr 20, 2026 | 2021-2026 Explorer vehicles equipped with the 2.3L EcoBoost engine may require air conditioning (A/C) compressor belt removal for various re… |
| 24N12 S2 | Other | Mar 31, 2026 | Certain 2021 - 2022 Model Year Various Vehicles Engine Valve Inspection Test This submission includes : Technical Instructions Updated word… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Ford, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Ford 24N10 S1 a recall?
No. A manufacturer communication is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 24N10 S1 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does 24N10 S1 cover?
The manufacturer filed it against 3 model years: 2022 Ford Explorer, 2021 Ford Explorer, 2020 Ford Explorer. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.