Porsche bulletin No. 123-23-2
What it saysTechnical information for APB1 - reprogramming gateway control unit NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated Aug 22, 2023, received Sep 9, 2023, about the electrical system. It names 1 model year (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 communicationTechnical information for APB1 - reprogramming gateway control unit
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| No. 123-23-2 | Service bulletin | Aug 22, 2023 | 10242130 | PDF, 84 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 1 model year this bulletin names have filed 5 complaints with NHTSA since 2015. 3 of them name Exterior Lighting, 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 backup lights of the 2024 Porsche Cayenne Coupe when the car is put into reverse are extremely dim, and do not adequately highlight what is behind the car. I learned this the first time on September 8th when I tried to back out of my friend’s narrow windy tree lined driveway at night.
2024 Porsche Cayenne · Exterior Lighting · filed with NHTSA Jan 8, 2024 · ODI 11564216
My 2024 Cayenne is outfitted with the LED HD Matrix headlights. The low beam lights "when adjusted to specifications" only project 30-40ft down the road. This is very dangerous not being able to see adequately in front of the car especially where I live which have many deer.
2024 Porsche Cayenne · Exterior Lighting · filed with NHTSA Mar 4, 2024 · ODI 11575222
The rotary volume control knob on the center console of my 2024 Porsche Cayenne Coupe detached during normal, routine interior cleaning while the vehicle was stationary. The knob lifted off the control shaft with minimal contact from a standard handheld vacuum nozzle.
2024 Porsche Cayenne · Electrical System · filed with NHTSA Dec 1, 2025 · ODI 11702293
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 group228 other manufacturer communications filed against the Porsche Cayenne 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. 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 |
| 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 |
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. 123-23-2 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. 123-23-2 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. 123-23-2 cover?
The manufacturer filed it against 1 model year: 2024 Porsche Cayenne. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.