Porsche bulletin No. 2503.1
What it saysInstructions on advanced technical information for the advanced driver assistance systems. NHTSA’s full summary ↓
Porsche filed this with NHTSA as a service bulletin dated Aug 20, 2025, received Jul 9, 2025, about the lane departure — 2 documents under this number. It names 96 model years (2016–2026). 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 communicationInstructions on advanced technical information for the advanced driver assistance systems. Please refer to PDF attached for more information regarding this.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| No. 2503.1 | Service bulletin | Aug 20, 2025 | 11022920 | PDF, 769 KB |
| No. 2503.1 | Service bulletin | Jun 28, 2025 | 11020513 | PDF, 12,428 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.
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Model years it names
Source: as the manufacturer filed themand 27 more on this site: 2024 Porsche Macan, 2023 Porsche Macan, 2022 Porsche Macan, 2021 Porsche Macan, 2020 Porsche Macan, 2019 Porsche Macan, 2018 Porsche Macan, 2017 Porsche Macan, 2016 Porsche Macan, 2026 Porsche Panamera, 2025 Porsche Panamera, 2024 Porsche Panamera, 2023 Porsche Panamera, 2022 Porsche Panamera, 2021 Porsche Panamera, 2020 Porsche Panamera, 2019 Porsche Panamera, 2018 Porsche Panamera, 2017 Porsche Panamera, 2016 Porsche Panamera, 2026 Porsche Taycan, 2025 Porsche Taycan, 2024 Porsche Taycan, 2023 Porsche Taycan, 2022 Porsche Taycan, 2021 Porsche Taycan, 2020 Porsche Taycan.
Also 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; 2016 Porsche 918 Spyder; 2023 Porsche Carrera; 2023 Porsche Carrera 4; 2023 Porsche Carrera 4 GTS; 2023 Porsche Carrera 4S; 2023 Porsche Carrera GTS; 2023 Porsche Carrera S; 2021 Porsche Cayman GT4; 2021 Porsche Cayman GTS; 2023 Porsche Edition 50 Year; 2017 Porsche Redundant Boxster; 2020 Porsche Redundant Boxster; 2021 Porsche Redundant Boxster; 2022 Porsche Redundant Boxster; 2020 Porsche Redundant Cayenne E-Hybrid; 2021 Porsche Redundant Cayman; 2022 Porsche Redundant Cayman; 2023 Porsche Redundant Cayman GT4; 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 67 model years this bulletin names have filed 808 complaints with NHTSA since 2015. 66 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.
Vehicle suddenly slammed on brakes on highway I90 in Chicago for NO apparent reason at 25mph. The car came to an immediate halt and if not for shoulder cars behind me would have stuck me. I am afraid to drive car. Dealership down plays faulty sensor, car has 2,000 miles. What assurance do I have to trust new sensor. System not redundant.
2023 Porsche Macan · Forward Collision Avoidance · filed with NHTSA Dec 9, 2023 · ODI 11559242
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
Brakes slammed on and hard left turn initiated. Collision warning light flashed. There was nothing in front of me. Action caused an artery to tear in my lung. Hospitalized with life threating injury. Car had recently received 1st year service. Called dealer service manager to report failure, he said the car could not do this.
2023 Porsche Macan · Forward Collision Avoidance · filed with NHTSA Oct 26, 2024 · ODI 11622099
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 lane departure
Source: same model, same component group1 other manufacturer communication filed against these Porsche models under the same component group (lane departure), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| No. 93-26 | Service bulletin | Sep 23, 2026 | Symptom-based workshop manual for False Warning from Lane Change Assist (LCA) - Warning Light in Exterior Mirror Flashes Without Reason |
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. 2503.1 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. 2503.1 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. 2503.1 cover?
The manufacturer filed it against 96 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.