Volkswagen bulletin VOS-25-34
What it saysThis is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: This hotfix is for the fill and bleed cooling system test funtion issue. NHTSA’s full summary ↓
Volkswagen filed this with NHTSA as a service bulletin dated Apr 22, 2025, received May 2, 2025, about the engine. It names 11 model years (2018–2025). 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 communicationThis is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: This hotfix is for the fill and bleed cooling system test funtion issue.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| VOS-25-34 | Service bulletin | Apr 22, 2025 | 11017589 |
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 themA 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 11 model years this bulletin names have filed 1,334 complaints with NHTSA since 2015. 401 of them name Engine — 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.
On the 2019 Volkswagen Jetta, the 70 owners who gave an odometer reading for Engine reported it at a median of 940 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The contact owns a 2022 Volkswagen Taos. The contact stated that while at a complete stop, the vehicle would intermittently stall upon depression of the accelerator pedal. The contact stated that the "shift to park" warning message would appear on the instrument panel as the contact would restart the vehicle and resume normal driving.
2022 Volkswagen Taos · Engine · filed with NHTSA Apr 19, 2022 · ODI 11461360
The contact owns a 2021 Volkswagen Jetta. The contact stated that while reversing at an undisclosed speed, the vehicle lost motive power. The check engine warning light was illuminated. The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure.
2021 Volkswagen Jetta · Engine · filed with NHTSA Feb 10, 2022 · ODI 11451329
The contact owns a 2024 Volkswagen Taos. The contact stated while driving at an undisclosed speed, the vehicle stalled. The vehicle was driven to the shoulder of the road. The check coolant warning light was illuminated. The contact stated that while attempting to start the vehicle, the vehicle failed to start.
2024 Volkswagen Taos · Engine · filed with NHTSA Oct 2, 2025 · ODI 11691053
In depth: 2019 Volkswagen Jetta engine problems → · 2022 Volkswagen Taos engine problems →
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 engine
Source: same model, same component group58 other manufacturer communications filed against these Volkswagen models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Volkswagen list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 54E4 / 5537 | Service bulletin | Sep 30, 2026 | Update ECM Control Module Programming |
| V0116152014815_20 | Service bulletin | Sep 17, 2026 | Suggested fuel additive |
| V0126032083018_1 | Service bulletin | Aug 20, 2026 | Update Programming of the Engine/Motor Control Module -J623- |
| V1718062017813_24 | Service bulletin | Jul 9, 2026 | Oil Consumption Measurement and Electronic Oil Consumption Measurement |
| 4C6D | Service bulletin | Jun 24, 2026 | Engine/Motor Control Module software update for DTC 0456 |
| TT 13-20-01_3 | Service bulletin | Jun 18, 2026 | Instruction, how to lubicate engine before initial start. |
| TT 10-18-02_2 | Other | Jun 18, 2026 | Lubricating engine components before reassembly. |
| V1719012012855_81 | Service bulletin | Jun 4, 2026 | Volkswagen Engine Oil Standards |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Volkswagen, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Volkswagen VOS-25-34 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 VOS-25-34 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 Volkswagen warranty extension on file lists the ones Volkswagen has filed.
Which vehicles does VOS-25-34 cover?
The manufacturer filed it against 11 model years: 2025 Volkswagen Jetta, 2024 Volkswagen Jetta, 2023 Volkswagen Jetta, 2021 Volkswagen Jetta, 2020 Volkswagen Jetta, 2019 Volkswagen Jetta and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.