Porsche bulletin No. 211-23
What it saysSymptom based workshop manual for a Brake Symptom - Yellow Warning Message “PSM Failure” in the Instrument Cluster: Checking Hydraulic Unit and Re-Program PSM Control Unit NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated Dec 2, 2025, received Jan 6, 2026, about the service brakes. It names 4 model years (2019–2021). 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 a Brake Symptom - Yellow Warning Message “PSM Failure” in the Instrument Cluster: Checking Hydraulic Unit and Re-Program PSM Control Unit
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| No. 211-23 | Service bulletin | Dec 2, 2025 | 11027029 | PDF, 178 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: 2020 Porsche Redundant Cayenne E-Hybrid.
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 3 model years this bulletin names have filed 93 complaints with NHTSA since 2015. 33 of them name Electrical System, Service Brakes — 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.
2019 Porsche Cayennes (and other Porsche models) have LiFe P04 lithium batteries that have an internal Battery Control Module that causes a "Battery Low " indication. Porsche has been updating the software/ firmware for this module, only for it to fail again. Eventually, the battery will fail, lose charge, and become dead.
2019 Porsche Cayenne · Electrical System · filed with NHTSA Nov 13, 2023 · ODI 11554814
Vehicle: 2020 Porsche Cayenne VIN: Mileage: 41,918 Complaint: My 2020 Porsche Cayenne exhibits a significant and repeatable lurching and abnormal braking pattern each time the vehicle decelerates to a stop. The behavior is consistent and pronounced enough to cause me physical motion sickness on every drive.
2020 Porsche Cayenne · Service Brakes · filed with NHTSA Apr 7, 2026 · ODI 11729733
when decelerating and car is in gear 2 it lurches the car forward while braking, basically fighting the attempt to slow the car down. I attribute this to aggressive downshifting, but is a safety issue because the operator then needs to compensate by pressing down on the brake pedal harder to stop the car.
2021 Porsche Cayenne · Service Brakes · filed with NHTSA Nov 8, 2021 · ODI 11439658
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 service brakes
Source: same model, same component group11 other manufacturer communications filed against these Porsche models under the same component group (service brakes), newest first. The eight newest are listed; the rest are on the Porsche list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| No. 77-26-1 | Service bulletin | Sep 23, 2026 | Technical Information for “Squealing” Brake Noises on the Front Brake During Braking. Note that this bulletin only applies to vehicles with… |
| No. 77-26 | Service bulletin | Aug 27, 2026 | Technical Information for "Squealing” Brake Noises on the Front Brake During Braking. Also includes model year 2027 Cayenne (9YA/9YB). |
| No. D752 | Service bulletin | Jan 5, 2026 | Parts information for parts withdrawal involving the caliper without brake pads. The part numbers affected are in the attached PDF. The vehi… |
| No. 2530 | Service bulletin | Dec 5, 2025 | Instructions on advanced technical information for Y1A, 971, 9YB, 9YA – Brake Noise & Long Brake Pedal |
| No. D749 | Service bulletin | Nov 18, 2025 | Parts information for parts withdrawal involving the brake disc 9Y0615301AJ |
| D719 | Service bulletin | May 5, 2025 | Parts information for Parts Withdrawal - 1 Set of Brake Pads for Disk Brake. Vehicles included are all cars that use part number 992698451R |
| No. D689 | Service bulletin | Jul 25, 2024 | Parts information for parts withdrawal involving the brake hose 9J1611707F and 9J1611708F |
| No. D684 | Service bulletin | Jun 17, 2024 | Parts information for parts withdrawal involving the retainer for brake hose/brake line |
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. 211-23 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. 211-23 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. 211-23 cover?
The manufacturer filed it against 4 model years: 2021 Porsche Cayenne, 2020 Porsche Cayenne, 2019 Porsche Cayenne, 2020 Porsche Redundant Cayenne E-Hybrid. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.