Ford bulletin 23B37
What it saysCertain 2023 Model Year Aviator and Explorer Vehicles equipped with 3.0L Engines Turbo Hose Routing Inspection and Repair NHTSA’s full summary ↓
Ford filed this with NHTSA as a service bulletin dated Jul 12, 2023, received Aug 4, 2023, about the engine. It names 2 model years across Ford and Lincoln (2023). A service bulletin 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.
One page for every brand it was filed under. Each brand’s bulletins: Ford · Lincoln.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhat it applies to, as NHTSA’s summary states it — build dates and equipment as the manufacturer filed them. The dealer checks the VIN and the build date on the door jamb; a vehicle outside the window is not covered by this bulletin.
Certain 2023 Model Year Aviator and Explorer Vehicles equipped with 3.0L Engines Turbo Hose Routing Inspection and Repair
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 23B37 | Service bulletin | Jul 12, 2023 | 10240422 | PDF, 1,968 KB |
What the document itself lists
The manufacturer titles it “Customer Satisfaction Program 23B37”.
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| L1MZ-18N344-E | Heater water hose | 1 | eBay Motors → |
Read by machine from the document NHTSA serves (22 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.
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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 themFord 1 model year
Lincoln 1 model year
A 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 2 model years this bulletin names have filed 145 complaints with NHTSA since 2015. 19 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.
Vehicle purchased in May 2023 (51323) at koons silver spring. Vehicle had computer and 'random stalling' issues where the car would not start/stay on in August 2023. Called dealership, vehicle towed to Koons for repair. Service team said they could not replicate issue.
2023 Ford Explorer · Engine · filed with NHTSA Nov 3, 2023 · ODI 11553342
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 these Ford models 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 and Lincoln, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Ford 23B37 a recall?
No. A service bulletin 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 23B37 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 23B37 cover?
The manufacturer filed it against 2 model years across 2 brands (Ford and Lincoln): 2023 Ford Explorer, 2023 Lincoln Aviator. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.