Porsche bulletin 09/26 4400
What it saysApproved: Wheels and Tires (09/26) NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated Jun 24, 2026, received Jul 7, 2026, about the wheels. It names 1 model year (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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationApproved: Wheels and Tires (09/26)
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 09/26 4400 | Service bulletin | Jun 24, 2026 | 11034760 | PDF, 379 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 1 model year this bulletin names have filed 5 complaints with NHTSA since 2015.
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 group16 other manufacturer communications filed against the Porsche Cayenne 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 |
|---|---|---|---|
| 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) |
| No. 11-23 | Service bulletin | May 26, 2026 | Installation and conversion instructions for the trailer hitch on the Cayenne. Model years not listed - please refer to PDF for more informa… |
| No. D774 | Service bulletin | Mar 25, 2026 | Parts information for Parts Withdrawal - Pressure Sensor (9A790605201) The cars affected are ones that use the part number mentioned. |
| No. D771 | Service bulletin | Mar 13, 2026 | Parts information for Parts Withdrawal - Hub Cap. Part numbers involved are 9Y0601149F, 9Y0601149G, 9Y0601149H, 9Y0601149J, 9Y0601149L, and… |
| No. 28-25 | Service bulletin | Dec 5, 2025 | Manufacturers certificate for approved wheels and tires on the Cayenne - MY24-26 |
| No. GR6D9 | Service bulletin | Oct 3, 2025 | Parts information for the thatcham wheel lock information. Since model year 2015, nearly all new vehicles… |
| No. 14-21 | Service bulletin | Sep 16, 2025 | Installation and conversion instructions for information on measuring the wheel system (manthey) |
| No. 2504 | Service bulletin | Aug 23, 2025 | Tech live look information for dynamics 365 remote assist environment verification steps. Includes all Porsche models |
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 09/26 4400 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 09/26 4400 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 09/26 4400 cover?
The manufacturer filed it against 1 model year: 2026 Porsche Cayenne. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.