Nissan bulletin EL25-009
What it saysPROCESS FOR 12V BATTERY TESTING APPLIED VEHICLES: 2026 LEAF (ZE2) SERVICE INFORMATION Due to changes to the DC-DC control logic, 12V battery testing may take an extra 20 minutes or more. NHTSA’s full summary ↓
Nissan filed this with NHTSA as a service bulletin dated Oct 2, 2025, received Oct 21, 2025, about the electrical system — 1 document under this number: NTB25-044. It names 1 model year (2026). 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 communicationPROCESS FOR 12V BATTERY TESTING APPLIED VEHICLES: 2026 LEAF (ZE2) SERVICE INFORMATION Due to changes to the DC-DC control logic, 12V battery testing may take an extra 20 minutes or more. To perform a faster 12V battery test, the DC-DC deactivation process must be completed which deactivates the DC-DC power supply for 1 hour. The 12V battery must be diagnosed or removed within 1 hour or power supply may be restored unintentionally. The DC-DC deactivation process is in the Electronic Service Manual (ESM) under Precautions for Removing Battery Terminal. · Refer to the ESM: ELECTRICAL & POWER CONTROL > POWER SUPPLY, GROUND & CIRCUIT ELEMENTS > PRECAUTION > PRECAUTIONS FOR REMOVING BATTERY TERMINAL > Precautions for Removing Battery Terminal · If the 12V battery is not replaced after testing, verify the power switch has been pressed to cycle the ignition to ACC mode ON and then back to ACC mode OFF to re-enable the DC-DC system which maintains the 12V battery.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| NTB25-044 | Service bulletin | Oct 2, 2025 | 11024394 | PDF, 72 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 1 model year this bulletin names have filed 3 complaints with NHTSA since 2015. 3 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’s daughter owns a 2026 Nissan Leaf. While the owner was driving 70 MPH with the ProPILOT Assist engaged, a semi-truck merged into the lane and crashed into the vehicle. Following the impact and the deployment of the front air bags, the driver was able to safely maneuver the vehicle to the side of the highway.
2026 Nissan Leaf · Electrical System · filed with NHTSA Oct 21, 2026 · ODI 11772797
The battery does not charge. Warning lights activated to check EV system. This first occurred about two months ago. Dash lights spontaneously resolved, but MIL light has remained on in Nissan App since that time. Dealership service initially said to return with vehicle when dash light and message reappeared.
2026 Nissan Leaf · Electrical System · filed with NHTSA Apr 21, 2026 · ODI 11732845
The car had a faulty dc/dc converter one month after purchase. The vehicle has about 900 total miles. Part number 292A0-8342R
2026 Nissan Leaf · Electrical System · filed with NHTSA Jun 28, 2026 · ODI 11747001
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 group18 other manufacturer communications filed against the Nissan Leaf under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Nissan list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| NTB15-049CC | Service bulletin | Mar 30, 2026 | TELEMATICS SERVICE INFORMATION HINT: This bulletin applies to vehicles equipped with a 4G network compatible TCU. TCUs compatible with 3G ne… |
| NTB26-002 | Service bulletin | Jan 13, 2026 | EFFICIENCY DISPLAYS LOWER THAN EXPECTED, BUT ACTUAL DRIVING RANGE OK IF YOU CONFIRM The efficiency display in the meter appears to be lower… |
| P5A27 | Service bulletin | Oct 17, 2025 | *****Dealer Announcement***** To ensure continued customer satisfaction and confidence, Nissan is conducting a Dealer Quality Action on cert… |
| NTB19-042F | Service bulletin | Feb 20, 2025 | AUTOMATIC EMERGENCY BRAKING WARNING LIGHT BLINKING APPLIED SYSTEMS: Vehicles equipped with a lane camera (see Figure 1) SERVICE INFORMATION… |
| R23D7 | Service bulletin | Jul 4, 2024 | VOLUNTARY SAFETY RECALL CAMPAIGN 2018-2022 LEAF; REAR CAMERA CAMPAIGN ID #: R23D7 APPLIED VEHICLES: 2018-2022 LEAF (ZE1) Check Service COMM… |
| NTB13-107G | Service bulletin | May 21, 2024 | VEHICLE KEY NOT DETECTED / AUTHENTICATED, ENGINE WILL NOT START This bulletin has been amended. See AMENDMENT HISTORY on the last page. Plea… |
| NTB13-027D | Service bulletin | May 21, 2024 | CAN COMMUNICATION – NETWORK DIAGNOSTIC FLOW CHART This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard pre… |
| NTB10-066C | Service bulletin | May 21, 2024 | CAN COMMUNICATION CODES – DIAGNOSTIC TIPS AND GUIDELINES This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please disc… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Nissan, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Nissan EL25-009 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 EL25-009 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 EL25-009 cover?
The manufacturer filed it against 1 model year: 2026 Nissan Leaf. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.