Volkswagen bulletin 50A6
What it saysUpdate engine/motor control module J623 NHTSA’s full summary ↓
Volkswagen filed this with NHTSA as a service bulletin dated May 29, 2025, received Jun 3, 2025, about the engine — 1 document under this number: V0125022077573_2. It names 3 model years (2023–2025). 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 communicationUPDATE ENGINE/MOTOR CONTROL MODULE J623
Trouble codes it names: P0300 P0301 all 2 read from the document itself; NHTSA’s summary names none
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| V0125022077573_2 | Service bulletin | May 29, 2025 | 11018932 |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 5G0 906 259 AF | MY24 Jetta GLI 2.0T | — | eBay Motors → |
| 5G0 906 259 AG | — | — | |
| 5G0 906 259 AK | — | — |
Read by machine from the document NHTSA serves (5 pages), read Sep 30, 2026. A part number is shown only where it matches Volkswagen’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 3 model years this bulletin names have filed 121 complaints with NHTSA since 2015. 25 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.
My 2024 VW Jetta GLI 2.0L 40th anniversary edition is throwing false engine codes. The system rings with a warning and the center display shows a statement that "RPM over 4500" while the real RPM's is at or below 2000 at the time of the warning.
2024 Volkswagen Jetta · Engine · filed with NHTSA Apr 9, 2026 · ODI 11730226
Coolant reservoir keeps getting empty every 1000 miles. Similar issue as reported under nhtsaId=11613107
2023 Volkswagen Jetta · Engine · filed with NHTSA Mar 14, 2025 · ODI 11648350
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 group54 other manufacturer communications filed against the Volkswagen Jetta 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 50A6 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 50A6 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 50A6 cover?
The manufacturer filed it against 3 model years: 2025 Volkswagen Jetta, 2024 Volkswagen Jetta, 2023 Volkswagen Jetta. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.