Porsche bulletin No. 11-23
What it saysInstallation and conversion instructions for the trailer hitch on the Cayenne. NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated May 26, 2026, received Jun 6, 2023, about the wheels — 6 documents under this number. It names 17 model years (2016–2026). 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.
Get the next Porsche bulletin for your model by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationInstallation and conversion instructions for the trailer hitch on the Cayenne. Model years not listed - please refer to PDF for more information
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| No. 11-23 | Service bulletin | May 26, 2026 | 11033650 | PDF, 1,088 KB |
| No. 11-23 | Service bulletin | Jan 27, 2026 | 11028566 | PDF, 1,033 KB |
| No. 11-23 | Service bulletin | Jul 17, 2025 | 11021635 | PDF, 1,133 KB |
| No. 11-23 | Service bulletin | Feb 20, 2024 | 10251226 | PDF, 717 KB |
| No. 11-23 | Service bulletin | Aug 4, 2023 | 10242054 | PDF, 98 KB |
| No. 11-23 | Service bulletin | May 5, 2023 | 10237373 | PDF, 182 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 themAlso filed against model years this site has no page for: 2020 Porsche Redundant Cayenne E-Hybrid.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Email me new Porsche bulletins for one of these models
A weekly email, sent only in a week when Porsche files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 16 model years this bulletin names have filed 219 complaints with NHTSA since 2015. 33 of them name Engine, Wheels — 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.
While driving my 2019 Porsche Cayenne S on the freeway, the check-engine light came on, followed by a message on the dashboard that read “Engine Control fault – Driving permitted – Visit workshop.” Moments later, the vehicle suddenly lost power and decelerated from about ~75 mph to around 55 mph, even though my foot was still on the…
2019 Porsche Cayenne · Engine · filed with NHTSA Nov 9, 2025 · ODI 11698394
On my 2021 Porsche Cayenne Base, which is equipped with the 3.0L V6 EA839 engine, I brought the vehicle to the dealership for a recall service. During inspection, the dealership found a leaking water pump and quoted $8,500 for repairs. There were no visible signs of a coolant leak on the ground, indicating an internal seal failure.
2021 Porsche Cayenne · Engine · filed with NHTSA Aug 31, 2026 · ODI 11760942
Heard a ticking noise while driving. Pulled over, on freeway. It was not a safe situation parked on side of a major freeway. Turned off car to look around the engine and found nothing. Started the car again and it died within 5 seconds. The electric system completely died after and would not crank.
2024 Porsche 911 · Engine · filed with NHTSA Mar 16, 2024 · ODI 11577795
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 wheels
Source: same model, same component group39 other manufacturer communications filed against these Porsche models under the same component group (wheels), newest first. The eight newest are listed; the rest are on the Porsche list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 24-26 | Service bulletin | Aug 31, 2026 | Manufacturer's Certificate for approved wheels and tires. Also includes model year 2024 911 S/T and GT3 Touring. |
| 23-26 | Service bulletin | Aug 31, 2026 | Manufacturer's Certificate for approved wheels and tires |
| 40/26 4407 | Service bulletin | Jun 30, 2026 | Wheel Bolt Replacement Requirement - Change from Wheel Bolts with Aluminum Washers to Wheel Bolts with Steel Washers (40/26) |
| 09/26 4400 | Service bulletin | Jun 24, 2026 | Approved: Wheels and Tires (09/26) |
| 53/26 4005 | Service bulletin | Jun 9, 2026 | Additional Test Instructions for Rim Damage on the Front Axle (53/26) |
| 109/21 4407 | Service bulletin | Jun 3, 2026 | Noise Symptom – Clicking Noises from the Area of the Front Axle: Observe Specified Procedure (SY 109/21) |
| No. 164-24-1 | Service bulletin | May 26, 2026 | Technical information for a Safety Pin on the Locking Unit in the Central Wheel Lock cannot be Pressed In / Jammed: Observe Specified Proced… |
| No. 1506.2 | Service bulletin | Apr 23, 2026 | Instructions on advanced technical information for center-locking wheel nut tightening. |
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. 11-23 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. 11-23 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. 11-23 cover?
The manufacturer filed it against 17 model years: 2024 Porsche 911, 2023 Porsche 911, 2022 Porsche 911, 2021 Porsche 911, 2016 Porsche 911, 2026 Porsche Cayenne and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.