Porsche bulletin No. 103-25-2
What it saysTechnical Information for Need to Replace Components of the High-Voltage Battery - High-Voltage Battery Control Unit / Cell module; No Mixed Installation Permitted: Observe Specified Approach NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated Sep 23, 2026, received Oct 2, 2026, about the electrical system — 2 documents under this number. It names 12 model years (2017–2023). 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 communicationTechnical Information for Need to Replace Components of the High-Voltage Battery - High-Voltage Battery Control Unit / Cell module; No Mixed Installation Permitted: Observe Specified Approach
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| No. 103-25-2 | Service bulletin | Sep 23, 2026 | 11037838 | PDF, 402 KB |
| No. 103-25-2 | Service bulletin | Sep 23, 2026 | 11037837 | PDF, 390 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 12 model years this bulletin names have filed 125 complaints with NHTSA since 2015. 51 of them name Electrical System, Power Train, Fuel/Propulsion 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 2018 Porsche Panamera. The contact received notification of the NHTSA Campaign Number: 23V033000 (Electrical System) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.
2018 Porsche Panamera · Electrical System · filed with NHTSA May 8, 2023 · ODI 11520904
In-car entertainment, transmissions controls, audio controls, climate controls (front and rear) , car will shut off without turning the key in off position, often times the vehicle will just terminate a call with no warning - no explantion, the rear camera on the screen in reverse show the rear of the car but it stays on for like 10…
2023 Porsche Cayenne · Electrical System · filed with NHTSA Jan 7, 2025 · ODI 11634723
A message appeared on the dashboard indicating a "Critical Electrical Failure" and "Park Safely" when I turned the key to start the car. This car is a plug-in e-hybrid (my 3rd of this model) and I always assumed that in case of a major failure, I could either use the engine or the electric propulsion system. This was not the case.
2023 Porsche Panamera · Electrical System · filed with NHTSA Jul 26, 2023 · ODI 11534599
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 group285 other manufacturer communications filed against these Porsche models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Porsche list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| No. 35-26 | Service bulletin | Sep 29, 2026 | Technical information for a Malfunction Indicator Light Active / Warning Message All-Wheel Drive Disturbed: Fault Memory Entry “U140500 - Te… |
| No. 37-26 | Service bulletin | Sep 22, 2026 | Symptom based workshop manual for Information Messages Regarding Assistance System Failures, Fault Memory Entry: Implausible Chassis Number… |
| No. 86-26 | Service bulletin | Sep 9, 2026 | Technical Information for Vehicle Color in Front Display/Control Panel Wrong after Replacing Central Computer (PCM) |
| No. 84-26 | Service bulletin | Sep 9, 2026 | Technical Information for Filler Flap on Vehicles with Hybrid Drive System (PHEV) Does Not Close |
| No. 81-26 | Service bulletin | Sep 8, 2026 | Technical Information for Yellow Warning Message “All-Wheel Drive System Malfunction”, “C12BEF6” and “C133700” in the All-Wheel Electronics… |
| WTK4 | Service campaign | Sep 1, 2026 | Technical Information for Campaign WTK4 – Reset Vehicle Electrical System Battery |
| No. 12-26 | Service bulletin | Sep 1, 2026 | Technical information for Damage to Nano Plug Contacts Due to Utilization of Incorrect Measuring Equipment |
| No. 2109-3 | Service bulletin | Aug 28, 2026 | Information on Advanced Technical Information for Critical 12V Li-ion Battery Recycling |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Porsche, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Porsche No. 103-25-2 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 No. 103-25-2 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. Every Porsche warranty extension on file lists the ones Porsche has filed.
Which vehicles does No. 103-25-2 cover?
The manufacturer filed it against 12 model years: 2023 Porsche Cayenne, 2022 Porsche Cayenne, 2021 Porsche Cayenne, 2020 Porsche Cayenne, 2019 Porsche Cayenne, 2023 Porsche Panamera and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.