Porsche bulletin No. 08-23
What it saysTechnical information on fault memory entry P081000, in the transmission electronics control unit NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated Mar 20, 2024, received Mar 4, 2023, about the fuel/propulsion system — 3 documents under this number. It names 13 model years (2021–2023). 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 on fault memory entry P081000, in the transmission electronics control unit
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| No. 08-23 | Service bulletin | Mar 20, 2024 | 10252594 | PDF, 1,382 KB |
| No. 08-23 | Service bulletin | Mar 23, 2023 | 10233936 | PDF, 53 KB |
| No. 08-23 | Service bulletin | Feb 27, 2023 | 10232446 | PDF, 44 KB |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 9GT927153G | — | — |
Read by machine from the document NHTSA serves (3 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 themAlso filed against model years this site has no page for: 2021 Porsche Cayman GT4; 2021 Porsche Redundant Boxster; 2021 Porsche Redundant Cayman; 2023 Porsche Redundant Cayman GT4.
A 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 9 model years this bulletin names have filed 132 complaints with NHTSA since 2015. 79 of them name Electrical System, Power Train, Fuel/Propulsion 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.
Two separate instances of fuel line failure and fuel leak in the engine compartment. The first in March 2024 and the second in September 2025. The situations both resulted in fuel leaking on top of the hot engine components. Repair requires removal of the engine and transmission. In 2024 repair time was 9 weeks, in 2025 - 3 weeks.
2021 Porsche 911 · Fuel/Propulsion System · filed with NHTSA Oct 15, 2025 · ODI 11693498
On November 12, 2025 the transmission, power train, and/or other components on my Porsche Macan S failed. My Macan was parked (gear selector in "Park") on a level surface, the ignition turned off and the key removed from the ignition when it was tapped from behind by another vehicle that was exiting a residential garage.
2021 Porsche Macan · Power Train · filed with NHTSA Jan 15, 2026 · ODI 11711211
Strong fuel smell in rear of vehicle, Upon further inspection, it was discovered that a hard fuel line connection was leaking from a fitting on top of a very hot engine and very close to a very hot manifold. Leak was very pronounced and there was strong evidence that this leak and been dropping for some time.
2022 Porsche 911 · Fuel/Propulsion System · filed with NHTSA Jul 13, 2026 · ODI 11750011
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 fuel/propulsion system
Source: same model, same component group33 other manufacturer communications filed against these Porsche models under the same component group (fuel/propulsion system), newest first. The eight newest are listed; the rest are on the Porsche list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| No. 103-25-2 | Service bulletin | Sep 23, 2026 | Technical Information for Need to Replace Components of the High-Voltage Battery - High-Voltage Battery Control Unit / Cell module; No Mixed… |
| WTL2 | Service campaign | Sep 1, 2026 | Porsche intranet posting for Campaign WTL2 – Replacing Electric Passenger Compartment Heater |
| GR13D804 | Service bulletin | Sep 1, 2026 | Parts Information for Parts Withdrawal - High-Voltage Heating (PTC) |
| WTH1 | Over-the-air update | Aug 24, 2026 | Porsche intranet post for Campaign WTH1 Over-the-Air (OTA) Update - Reprogramming high-voltage central box (JX6) |
| No. 240-24-5 | Service bulletin | Aug 5, 2026 | Technical Information for Replacement Requirement for 22 kW High-Voltage Charger - OBC |
| WNM9 | Service campaign | Jul 9, 2026 | Re-Programming DME Control Unit (Workshop Campaign) |
| WTB0 | Service campaign | Jul 6, 2026 | Reprogramming the engine ECU to resolve fan blockage fault codes |
| nO. d766 | Service bulletin | Feb 23, 2026 | Parts information for parts withdrawal involving the fuel filler flap and the charge cable for mains socket. Part numbers 976809857E and 7PP… |
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. 08-23 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. 08-23 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. 08-23 cover?
The manufacturer filed it against 13 model years: 2022 Porsche 718, 2021 Porsche 718, 2023 Porsche 911, 2022 Porsche 911, 2021 Porsche 911, 2021 Porsche Cayenne and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.