Volkswagen bulletin 51C6
What it saysUpdate Programming software of the Engine/Motor Control Module -J623- to improve thermostat performance. NHTSA’s full summary ↓
Volkswagen filed this with NHTSA as a service bulletin dated Feb 6, 2026, received Oct 3, 2025, about the engine — 3 documents under this number: V0125052079099_3, V0125052079099_2, V0125052079099. It names 4 model years (2022–2024). 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 Programming software of the Engine/Motor Control Module -J623- to improve thermostat performance.
Trouble codes it names: P00B7 P0116 P2681 all 3 read from the document itself; NHTSA’s summary names none
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| V0125052079099_3 | Service bulletin | Feb 6, 2026 | 11029310 | |
| V0125052079099_2 | Service bulletin | Oct 16, 2025 | 11025433 | |
| V0125052079099 | Service bulletin | Sep 10, 2025 | 11023837 |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 5H0 906 259 | — | — | |
| 3G0 906 259 | — | — | |
| 8Y0 906 264 | — | — |
Read by machine from the document NHTSA serves (6 pages), read Sep 29, 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 4 model years this bulletin names have filed 196 complaints with NHTSA since 2015. 28 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.
VW has implemented a so-called and unwanted safety feature called "Hill Assist" which locks the brakes on manual transmisson models when at a standstill which has many times nearly caused an accident.
2023 Volkswagen Golf / GTI · Engine · filed with NHTSA Dec 24, 2024
While driving, the vehicle developed uneven acceleration and an audible metallic rattling/buzzing sound. Shortly after, the engine locked up, stalled, and jerked the car to a stop while in traffic.
2022 Volkswagen Golf / GTI · Engine · filed with NHTSA Sep 1, 2026
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 group47 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 |
|---|---|---|---|
| V1718062017813_24 | Service bulletin | Jul 9, 2026 | Oil Consumption Measurement and Electronic Oil Consumption Measurement |
| 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 |
| VOS-26-21 | Service bulletin | Mar 27, 2026 | This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: A… |
| V0124032073665_3 | Service bulletin | Feb 25, 2026 | Engine Light ON, DTCs P2004,P2006,P2014 or P2015 Stored in Engine Motor Control Module, Replace Intake Manifold Runner Control Valve -N316- |
| V0124032073665_2 | Service bulletin | Nov 12, 2025 | Contamination within the Intake maniold runner control module causing the valve to stick closed. |
| SM 57-2025 | Other | Nov 10, 2025 | This special notice is to inform dealers to return the parts listed and only order the successor parts going forward. |
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 51C6 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 51C6 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.
Which vehicles does 51C6 cover?
The manufacturer filed it against 4 model years: 2023 Volkswagen Arteon, 2024 Volkswagen Golf / GTI, 2023 Volkswagen Golf / GTI, 2022 Volkswagen Golf / GTI. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.