Porsche bulletin No. 26-21
What it saysTechnical information for recall campaign WMB2 - checking screws on component protection on high-voltage battery and reworking them if necessary. NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated Jul 5, 2024, received Jul 6, 2021, about the electrical system — 4 documents under this number. It names 8 model years (2016–2021). 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 recall campaign WMB2 - checking screws on component protection on high-voltage battery and reworking them if necessary.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| No. 26-21 | Service bulletin | Jul 5, 2024 | 11005612 | PDF, 154 KB |
| No. 26-21 | Service bulletin | Mar 7, 2022 | 10209788 | PDF, 112 KB |
| No. 26-21 | Service bulletin | Feb 11, 2022 | 10208613 | PDF, 482 KB |
| No. 26-21 | Service bulletin | Jun 15, 2021 | 10198941 | PDF, 291 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.
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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 8 model years this bulletin names have filed 190 complaints with NHTSA since 2015. 99 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 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
The contact owns a 2020 Porsche Taycan 4S. The contact received notification of NHTSA Campaign Number: 24V732000 (ELECTRICAL SYSTEM); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.
2020 Porsche Taycan · Electrical System · filed with NHTSA Mar 6, 2025 · ODI 11646798
The contact owns a 2017 Porsche Panamera. The contact received notification of NHTSA Campaign Number: 23V033000 (Electrical System) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.
2017 Porsche Panamera · Electrical System · filed with NHTSA Mar 21, 2023 · ODI 11512989
In depth: 2020 Porsche Taycan electrical problems →
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 group329 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. 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) |
| 16/26 | Service bulletin | Aug 5, 2026 | Mode Switch on Multi-Function Steering Wheel is Not Working Intermittently / Permanently - Check Electric Plug Connection for Mode Switch… |
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. 26-21 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. 26-21 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. 26-21 cover?
The manufacturer filed it against 8 model years: 2021 Porsche Panamera, 2020 Porsche Panamera, 2019 Porsche Panamera, 2018 Porsche Panamera, 2017 Porsche Panamera, 2016 Porsche Panamera and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.