Porsche service campaign WTF7
What it saysDue to a software error in the Battery Management System (BMS), there have been isolated cases of an unintentional software reset and consequently a communication error as a result of implausible time differences. NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service campaign dated Jul 6, 2026, about the electrical system — 2 documents under this number. It names 4 model years (2025–2026). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationDue to a software error in the Battery Management System (BMS), there have been isolated cases of an unintentional software reset and consequently a communication error as a result of implausible time differences. This sometimes causes yellow “Battery low” warning messages followed by red “Vehicle electrical system fault” warning messages to appear on the instrument cluster, which automatically reset themselves after the vehicle has been parked.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| WTF7 | Service campaign | Jul 6, 2026 | 11034545 | PDF, 74 KB |
| WTF7 | Service campaign | Jun 2, 2026 | 11034544 | PDF, 73 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 4 model years this bulletin names have filed 5 complaints with NHTSA since 2015. 2 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.
This is a brand new electrical vehicle (2025), with just under 1000 miles on it. I was driving on a medium-speed highway when an electrical system error message appeared suddenly and the car lost the ability to accelerate.
2025 Porsche Taycan · Electrical System · filed with NHTSA Oct 24, 2025 · ODI 11695366
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 group345 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. 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 |
| WSL3 | Service campaign | Aug 25, 2026 | Porsche intranet posting with information on workshop campaign WSL3 - replacing electric passenger compartment heater |
| No. 2433-4 | Service bulletin | Aug 20, 2026 | Information on Advanced Technical Information for Porsche Mobile Charger NEMA Supply Cable Initialization Failure |
| No. 2315-1 | Service bulletin | Aug 20, 2026 | Information on Advanced Technical Information for Porsche Mobile Charger Plus (PMC+) Red LEDs and Fault B191E49 |
| No. 65-26 | Service bulletin | Aug 6, 2026 | Technical Information for Horizontal Stripes in Front Control Panel/Central Display (PCM) |
| 48/26 | Service bulletin | Aug 5, 2026 | Additional Action when Working on the High-Voltage Battery: Extended Replacement Requirement for Cell Block Module (48/26) |
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 WTF7 a recall?
No. A service campaign 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 WTF7 repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does WTF7 cover?
The manufacturer filed it against 4 model years: 2026 Porsche 911, 2025 Porsche 911, 2026 Porsche Taycan, 2025 Porsche Taycan. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.