Porsche warranty extension 18/26
What it saysWarranty Information: Warranty Extension for Transmission Electronics Control Unit (18/26) NHTSA’s full summary ↓
Porsche filed this with NHTSA as a warranty extension dated Jul 23, 2026, received Aug 6, 2026, about the power train. It names 41 model years (2016–2022). A warranty extension 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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWarranty Information: Warranty Extension for Transmission Electronics Control Unit (18/26)
One of the 432 warranty extensions and special-coverage programs on file — every make, with the term each runs to.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 18/26 | Warranty extension | Jul 23, 2026 | 11035922 | PDF, 56 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 Boxster S; 2018 Porsche 718 Boxster S; 2019 Porsche 718 Boxster S; 2017 Porsche 718 Cayman S; 2018 Porsche 718 Cayman S; 2019 Porsche 718 Cayman S; 2021 Porsche Cayman GTS; 2017 Porsche Redundant Boxster; 2020 Porsche Redundant Boxster; 2021 Porsche Redundant Boxster; 2022 Porsche Redundant Boxster; 2021 Porsche Redundant Cayman; 2022 Porsche Redundant Cayman; 2022 Porsche Redundant Cayman GTS.
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 27 model years this bulletin names have filed 82 complaints with NHTSA since 2015. 15 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
On the day of delivery of this Porsche Approved Certified Pre-Owned vehicle (purchased May 24, 2022, from Porsche Nashua, Nashua, NH), traction control and all-wheel-drive warnings appeared on the drive home from the dealership. The valve lift solenoid/actuator was replaced under warranty; the vehicle spent 7 days in the shop.
2017 Porsche 911 · Power Train · filed with NHTSA Sep 29, 2026 · ODI 11767918
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
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 group37 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. 91-26 | Service bulletin | Sep 24, 2026 | Technical Information for Particles/Metal Chips/Residues in Engine Oil |
| SY No. 72-26 | Service bulletin | Sep 23, 2026 | Symptom-based workshop manual for High-Pitched “Whining” and Whistling Noises in Partial Load Operation from the Engine Area. Note that this… |
| No. 72-26 | Service bulletin | Sep 23, 2026 | Symptom-based workshop manual for High-Pitched “Whining” and Whistling Noises in Partial Load Operation from the Engine Area. Note that this… |
| 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… |
| No. 62-26 | Service bulletin | Sep 1, 2026 | Technical Information for Coolant Warning Light Lights Up: Suspected Coolant Loss on the Coolant Pump |
| No. 2304-2 | Service bulletin | Aug 24, 2026 | Information on Advanced Technical Information for E3. I/G2 V8 – Oil/Air Separator Membrane Failure |
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 18/26 a recall?
No. A warranty extension 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 18/26 repair free?
A warranty extension 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 18/26 cover?
The manufacturer filed it against 41 model years: 2022 Porsche 718, 2021 Porsche 718, 2020 Porsche 718, 2022 Porsche 911, 2021 Porsche 911, 2020 Porsche 911 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.