Porsche bulletin No. 88-25-2
What it saysSymptom based workshop manual for information on Complaints Regarding Shifting Quality on Double-Clutch Transmissions in Conjunction with Message "Transmission Faulty" NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated Nov 25, 2025, received Dec 5, 2025, about the power train. It names 25 model years (2017–2026). 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 communicationSymptom based workshop manual for information on Complaints Regarding Shifting Quality on Double-Clutch Transmissions in Conjunction with Message "Transmission Faulty"
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| No. 88-25-2 | Service bulletin | Nov 25, 2025 | 11026413 | PDF, 221 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: 2017 Porsche 718; 2017 Porsche 718 Boxster S; 2018 Porsche 718 Boxster S; 2019 Porsche 718 Boxster S; 2026 Porsche 718 Cayman; 2017 Porsche 718 Cayman S; 2018 Porsche 718 Cayman S; 2019 Porsche 718 Cayman S; 2018 Porsche 718 Spyder; 2019 Porsche 718 Spyder; 2022 Porsche Redundant Cayman.
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 14 model years this bulletin names have filed 19 complaints with NHTSA since 2015. 5 of them name Power Train — 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.
The contact owns a 2018 Porsche 718 Cayman. The contact stated that while the spouse was driving the vehicle at 70 MPH, abnormal handling occurred, followed immediately by a loud knocking noise. The driver pulled the vehicle to the side of the road and discovered the rear left axle had fractured, detached, and was hanging on the ground.
2018 Porsche Cayman · Power Train · filed with NHTSA Oct 16, 2026 · ODI 11771621
The passenger side (right rear) inside CV joint grease boot clamp failed and leaked grease. I discovered it while switching out Winter to Summer tires. I have included pictures. In researching the defect I found that it is a common occurrence with the Porsche 718 Cayman and occurs with low mileage.
2017 Porsche Cayman · Power Train · filed with NHTSA Apr 16, 2026 · ODI 11731699
2017 Porsche Boxster 718 with pdk has started in 2nd gear on 3 occasions making entering into traffic at a slow rate of speed very dangerous. 1st time the pdk transmission was in park and then I moved it to drive. The pdk selected gear 2 while in sport mode.
2017 Porsche Boxster · Power Train · filed with NHTSA Nov 13, 2019 · ODI 11279864
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 power train
Source: same model, same component group17 other manufacturer communications filed against these Porsche models under the same component group (power train), newest first. The eight newest are listed; the rest are on the Porsche list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| No. 87-26 | Service bulletin | Sep 29, 2026 | Technical Information for Rattling Noises from Around the Rear Silencer |
| No. 28-26 | Service bulletin | Sep 22, 2026 | Technical information on Transmission Warning Message “P Not Available”, Fault Memory Entries for Parking Lock Buttons in the Shift Console… |
| No. 26-26 | Service bulletin | Sep 22, 2026 | Manufacturer's Certificate for Overview of Approved Porsche C30 Engine Oils. Note that the bulletin includes all models back to model year 1… |
| 18/26 | Warranty extension | Jul 23, 2026 | Warranty Information: Warranty Extension for Transmission Electronics Control Unit (18/26) |
| 09/26 3730 | Service bulletin | Jun 30, 2026 | Permanent Fault Memory Entries “P1775”/“P071400”/“P184900” in Transmission Electronics Control Unit (PDK) (09/26) |
| No. D780 | Service bulletin | Apr 17, 2026 | Parts information for parts withdrawal involving the transmission oil. Part number 00004321012 is affected - the vehicles that use this part… |
| No. D768.1 | Service bulletin | Mar 5, 2026 | Parts information for parts withdrawal involving the transmission fluid. Part number 00004321048. The cars affected are ones that use the pa… |
| No. D768 | Service bulletin | Feb 27, 2026 | Parts information for parts withdrawal involving the (00004321048) Transmission fluid. The vehicles affected are ones that use the part numb… |
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. 88-25-2 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. 88-25-2 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. 88-25-2 cover?
The manufacturer filed it against 25 model years: 2025 Porsche 718, 2024 Porsche 718, 2023 Porsche 718, 2022 Porsche 718, 2021 Porsche 718, 2020 Porsche 718 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.