Lincoln bulletin SU4 P4 NAUTILUS
What it says"Software Update 4 P4 for 2021- 2023 Nautilus vehicles is now available. NHTSA’s full summary ↓
Lincoln filed this with NHTSA as a service bulletin dated Aug 10, 2023, received Sep 7, 2023, about the back over prevention. It names 3 model years (2021–2023). 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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communication"Software Update 4 P4 for 2021- 2023 Nautilus vehicles is now available. Quality Improvements include: - Increase number of times the Backup startup password set-up pop-up is displayed after creating a Phone as a Key. - Improved Telematics Control Unit functionality. "
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| SU4 P4 NAUTILUS | Service bulletin | Aug 10, 2023 | 10241982 | PDF, 63 KB |
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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
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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 43 complaints with NHTSA since 2015. 4 of them name Back Over Prevention — 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.
The contact owns a 2021 Lincoln Nautilus. The contact received notification of NHTSA Campaign Number: 25V315000 (Back Over Prevention); however, the part to do the recall repair was not yet available. The local dealer was contacted.
2021 Lincoln Nautilus · Back Over Prevention · filed with NHTSA Sep 10, 2025
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 back over prevention
Source: same model, same component group4 other manufacturer communications filed against the Lincoln Nautilus under the same component group (back over prevention), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| TSB 25-2422 | Other | Mar 26, 2026 | This article supersedes TSB 25-2372 to update the vehicle symptoms. |
| 25N17 | Other | Mar 25, 2026 | Advance Notice – Customer Satisfaction Program 25N17 Certain 2015-2025 Model Year Multiple Vehicle Lines Rear View Camera Replacement If Req… |
| SSM 52134 | Service bulletin | Dec 12, 2023 | Various 2021-2024 Ford and Lincoln vehicles equipped with the rear camera on demand feature may exhibit a Please Check Surroundings For Safe… |
| SSM 52125 | Service bulletin | Dec 8, 2023 | Some 2024 Nautilus vehicles may exhibit diagnostic trouble code (DTC) U3000:49 in the camera module-rear (CMR) when a diagnostic self-test i… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Lincoln, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Lincoln SU4 P4 NAUTILUS 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 SU4 P4 NAUTILUS 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 SU4 P4 NAUTILUS cover?
The manufacturer filed it against 3 model years: 2023 Lincoln Nautilus, 2022 Lincoln Nautilus, 2021 Lincoln Nautilus. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.