Land Rover bulletin Defender_N846_16MAY25
What it saysBelt Integrated Starter Generator (BISG) Charging Inoperative on First Startup NHTSA’s full summary ↓
Land Rover filed this with NHTSA as a manufacturer communication dated May 16, 2025, received Jun 5, 2025, about the electrical system. It names 2 model years (2023–2024). 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 communicationBelt Integrated Starter Generator (BISG) Charging Inoperative on First Startup
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| Defender_N846_16MAY25 | Other | May 16, 2025 | 11019209 | PDF, 192 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.
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 2 model years this bulletin names have filed 116 complaints with NHTSA since 2015. 59 of them name Electrical System — 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 2024 Land Rover Defender. The contact received notification of NHTSA Campaign Number: 26V248000 (Electrical System). The local dealer was contacted and confirmed that parts were on backorder. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The contact had not experienced a failure
2024 Land Rover Defender · Electrical System · filed with NHTSA Aug 25, 2026 · ODI 11759455
Infotainment screen randomly goes black while driving. Does not come back on. This screen displays and controls everything for the vehicle. Maps, system info, music, etc. Instructions to "reset" the system consists of reaching toward the passenger side of the dashboard to hold down a power button for about 30 seconds.
2023 Land Rover Defender · Electrical System · filed with NHTSA Nov 4, 2023 · ODI 11553610
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 electrical system
Source: same model, same component group56 other manufacturer communications filed against the Land Rover Defender under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Land Rover list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SSM76110 - 21AUG26 | Other | Aug 22, 2026 | Vehicles on display e.g. in a showroom whilst being supported by a showroom 12v support unit, these vehicles require an additional fuse to b… |
| SSM76110 - 19AUG26 | Other | Aug 20, 2026 | Vehicles on display e.g. in a showroom whilst being supported by a showroom 12v support unit, these vehicles require an additional fuse to b… |
| N811 Defender 15MAY26 | Other | May 16, 2026 | Door Zone Module - Quiescent Drain |
| SSM76451 - 23APR26 | Other | Apr 23, 2026 | Where vehicles are supported by a 12V Battery Support Unit (BSU) and repeatedly interacted with while the engine is not running, the 48V bat… |
| N811 Defender 17APR26 | Other | Apr 17, 2026 | Door Zone Module - Quiescent Drain |
| N811 Defender 20MAR26 | Other | Mar 20, 2026 | Door Zone Module - Quiescent Drain |
| SSM76411 - 10MAR26 | Other | Mar 10, 2026 | Smart Key Deactivated message on instrument cluster and unable to start their vehicle |
| TUCC_FEB2026_35 | Other | Feb 13, 2026 | There is a concern with the 48Volt charging system(DC/DC) with the vehicle. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Land Rover, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Land Rover Defender_N846_16MAY25 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 Defender_N846_16MAY25 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 Defender_N846_16MAY25 cover?
The manufacturer filed it against 2 model years: 2024 Land Rover Defender, 2023 Land Rover Defender. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.