Service campaign WNH2
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service campaign |
|---|---|
| NHTSA id | 11023016 |
| Published by NHTSA | 2025-09-09 |
| Manufacturer's number | WNH2 |
| Manufacturer's date | 2025-08-23 |
| Campaign id or software version | WNH2 |
| NHTSA component | ENGINE |
NHTSA's summary
Porsche intranet posting with information on WNH2 - reprogramming DME control unit
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Engine
| PORSCHE 718 BOXSTER | 2017, 2018, 2019 |
|---|---|
| PORSCHE 718 CAYMAN | 2017, 2018, 2019 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| No. 28-26 | 2026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C40 Engine Oils. Note that this bulletin covers all models back to model year 1984, for which C40 engine oils are allocated. |
|---|---|
| No. 27-26 | 2026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C20 Engine Oils. Note that the bulletin covers all models back to model year 1984, for which C20 engine oils are allocated. |
| No. 26-26 | 2026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche C30 Engine Oils. Note that the bulletin includes all models back to model year 1984, for which C30 engine oils are allocated. |
| No. 25-26 | 2026-10-02. Service bulletin. Manufacturer's Certificate for Overview of Approved Porsche A40 Engine Oils. Note that this bulletin covers all vehicles from model year 1997 to 2020, for which A40 engine oils are assigned. Model years 1997-2001 are not available for selection in the system. |
| 13/26 | 2026-08-06. Service bulletin. Allocation of Approved Engine Oils MY 2027 (13/26) |
| GR13D790 | 2026-07-08. Other. Parts Withdrawal - Various Parts |
| 20/26 | 2026-07-07. Other. Overview of Approved Porsche C20 Engine Oils (20/26) |
| 19/26 1701 | 2026-07-07. Other. Overview of Approved Porsche C30 Engine Oils (19/26) |
| 21/26 1701 | 2026-07-07. Other. Overview of Approved Porsche C40 Engine Oils (21/26) |
| 15/26 1701 | 2026-07-07. Other. Overview of Approved Porsche A40 Engine Oils (15/26) |