Porsche bulletin No. 35-21
What it saysInstallation and conversion instructions for retrofitting the LED tail light with light panel on the Panamera. NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated Jun 29, 2024, received Apr 2, 2021, about the electrical system — 4 documents under this number. It names 10 model years (2017–2024). 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 communicationInstallation and conversion instructions for retrofitting the LED tail light with light panel on the Panamera.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| No. 35-21 | Service bulletin | Jun 29, 2024 | 11003058 | PDF, 1,033 KB |
| No. 35-21 | Service bulletin | Aug 2, 2022 | 10219336 | PDF, 1,033 KB |
| No. 35-21 | Service bulletin | Jun 17, 2021 | 10198953 | PDF, 438 KB |
| No. 35-21 | Service bulletin | Mar 3, 2021 | 10189694 | PDF, 262 KB |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 9J1915681AK | Charging socket Combi 1 (North America region) | — | eBay Motors → |
| 9J1915681AH | Charging socket Combi 2 (EU) | — | eBay Motors → |
Read by machine from the document NHTSA serves (7 pages), read Sep 30, 2026. A part number is shown only where it matches Porsche’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 10 model years this bulletin names have filed 102 complaints with NHTSA since 2015. 47 of them name Electrical System, Exterior Lighting — 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.
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
Check left rear light warning light came up. Took car to mechanic when the light housing was removed it broke into pieces. Mechanic stated 2 others in the past month had the same issue. Issue comes from heat and improper shielding makes the housing britle. Car has 19k miles only. Over $1500 to repair
2017 Porsche 911 · Exterior Lighting · filed with NHTSA Nov 4, 2025 · ODI 11697476
The contact owns a 2018 Porsche Carrera. The contact stated while driving at 50MPH when the contact attempted to turn off their headlight switch on the vehicle but instead accidentally hit the ignition switch which caused the engine to shut off and the vehicle to coast on its own.
2018 Porsche 911 · Electrical System · filed with NHTSA Jan 27, 2022 · ODI 11449177
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 group412 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 No. 35-21 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. 35-21 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. 35-21 cover?
The manufacturer filed it against 10 model years: 2021 Porsche 911, 2020 Porsche 911, 2019 Porsche 911, 2018 Porsche 911, 2017 Porsche 911, 2024 Porsche Panamera and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.