Porsche service campaign WNH2
Porsche filed this with NHTSA as a service campaign dated Aug 23, 2025, received Sep 8, 2025, about the engine — 2 documents under this number: No. 166-23. It names 5 model years (2017–2019). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationPorsche intranet posting with information on WNH2 - reprogramming DME control unit
Documents filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| WNH2 | Service campaign | Aug 23, 2025 | 11023016 |
| No. 166-23 | Service campaign | Aug 21, 2025 | 11022927 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5; the full text comes from the manufacturer or a dealer. 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. Quote it 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: 2017 Porsche 718 Boxster; 2018 Porsche 718 Boxster; 2017 Porsche 718 Cayman; 2018 Porsche 718 Cayman.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Common questions
Source: NHTSA, 49 CFR 579.5Is Porsche WNH2 a recall?
No. A service campaign 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 WNH2 repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does WNH2 cover?
The manufacturer filed it against 5 model years: 2019 Porsche 718, 2017 Porsche 718 Boxster, 2018 Porsche 718 Boxster, 2017 Porsche 718 Cayman, 2018 Porsche 718 Cayman. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.