Porsche bulletin No. 2503.2
What it saysInstructions on advanced technical information for troubleshooting ADAs systems NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated Jul 22, 2025, received Aug 6, 2025, about the forward collision avoidance. It names 22 model years (2020–2026). 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.
Get the next Porsche bulletin for your model by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationInstructions on advanced technical information for troubleshooting ADAs systems
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| No. 2503.2 | Service bulletin | Jul 22, 2025 | 11021643 | PDF, 14,089 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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
Find the adaptive cruise control for the 2026 911 →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Email me new Porsche bulletins for one of these models
A weekly email, sent only in a week when Porsche files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 22 model years this bulletin names have filed 357 complaints with NHTSA since 2015. 58 of them name Forward Collision Avoidance, Lane Departure — 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.
Collion Warning alarm came on with full application of brakes with no vehicles in front or behind. No onward traffic either. Visibility was clear, and driving conditions good. Driving at 35-40 mph. Informed dealer three times (and three different individuals) on December 31 and despite a bevy of promises they have taken no action.
2024 Porsche Macan · Forward Collision Avoidance · filed with NHTSA Jan 16, 2026 · ODI 11711390
I purchased this vehicle in July 2025 from Porsche Delaware. The car had 7000 miles on it certified preowned after owning it for one week I started having yellow lights come on for parking lien changer detections driving assistance brought it into Porsche in Clifton Park New York, they recorded the car got the car back.
2024 Porsche Panamera · Lane Departure · filed with NHTSA Jan 13, 2026 · ODI 11710749
Collision warning system has never worked properly. Now it is not working at all. This was verify by Jeff Leather service director at Reno Porsche on Jan 22. They basically said the because it is old tecknology there is not much they can do about it. They are still selling new 2026 Macan with the same issues.
2025 Porsche Macan · Forward Collision Avoidance · filed with NHTSA Feb 13, 2026 · ODI 11717807
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 forward collision avoidance
Source: same model, same component group10 other manufacturer communications filed against these Porsche models under the same component group (forward collision avoidance), newest first. The eight newest are listed; the rest are on the Porsche list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| No. 11-25-4 | Service bulletin | Aug 25, 2026 | Technical Information for White Messages Regarding Driver Assistance Systems in Conjunction with Passive Fault Memory Entries in the ZFAS Co… |
| No. 2606-1 | Service bulletin | Aug 20, 2026 | Information on Advanced Technical Information for E3II V8 Cayenne – Various Assistance System Warning Messages in the Instrument Cluster due… |
| No. 75-25 | Service bulletin | Aug 14, 2026 | Technical information for Various White Messages Regarding Driver Assistance Systems In the Instrument Cluster/Fault Memory Entry "C12D5FA"… |
| No. 2606 | Service bulletin | Aug 5, 2026 | Information on Advanced Technical Information for E3II V8 Cayenne – Various Assistance System Warning Messages in the Instrument Cluster due… |
| No. 75-25-2 | Service bulletin | Nov 26, 2025 | Technical information for Various White Messages Regarding Driver Assistance Systems In the Instrument Cluster/Fault Memory Entry "C12D5FA"… |
| No. 75-25-1 | Service bulletin | Nov 26, 2025 | Technical information for Various White Messages Regarding Driver Assistance Systems In the Instrument Cluster/Fault Memory Entry "C12D5FA"… |
| No. 2503.3 | Service bulletin | Nov 21, 2025 | Instructions on advanced technical information for Troubleshooting Advanced Driver Assistance Systems (ADAS) |
| No. 2121.3 | Service bulletin | Jul 8, 2025 | Instructions on advanced technical information for the Cayenne - ACC Dynamic Calibration Fault C110300 |
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. 2503.2 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. 2503.2 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. 2503.2 cover?
The manufacturer filed it against 22 model years: 2026 Porsche 911, 2025 Porsche 911, 2024 Porsche 911, 2023 Porsche 911, 2022 Porsche 911, 2021 Porsche 911 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.