Volkswagen bulletin 4D14
What it saysUpdate Programming of Engine/Motor Control Module J623 and replacement of FTIV if necessary. NHTSA’s full summary ↓
Volkswagen filed this with NHTSA as a service bulletin dated May 2, 2025, received Jun 3, 2025, about the fuel/propulsion system — 1 document under this number: V0123122072378_2. It names 2 model years (2020–2021). 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 of Engine/Motor Control Module J623 and replacement of FTIV if necessary.
Trouble codes it names: P2421 all 1 read from the document itself; NHTSA’s summary names none
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| V0123122072378_2 | Service bulletin | May 2, 2025 | 11018931 |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 5Q0201549C | Pressure Regulation Valve / | — | eBay Motors → |
Read by machine from the document NHTSA serves (6 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 2 model years this bulletin names have filed 124 complaints with NHTSA since 2015. 15 of them name Fuel/Propulsion System — 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.
Bad bearing in left front wheel. Radio shuts down anytime even when reverse camera is active. Front collision warning and auto braking for clear road, no obstruction. Smog warning override when check engine light for fuel system delivery done by mechanic at Flow VW of Greensboro NC.
2021 Volkswagen Jetta · Fuel/Propulsion System · filed with NHTSA Jan 28, 2023 · ODI 11504172
Catastrophic fuel pump failure at 14,000 miles ' both fuel pump and fuel pump module had to be replaced. The vehicle had been maintained properly according to scheduled maintenance standards
2020 Volkswagen Jetta · Fuel/Propulsion System · filed with NHTSA Apr 15, 2021 · ODI 11408286
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 fuel/propulsion system
Source: same model, same component group2 other manufacturer communications filed against the Volkswagen Jetta under the same component group (fuel/propulsion system), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SM 67-2025 | Other | Dec 3, 2025 | This special notice is to inform dealers to return the parts listed and only order the successor parts going forward. |
| SM 11-2023 VWMEX | Service bulletin | Jun 12, 2023 | This special notice is to inform dealers to return the parts listed if it meets the criteria provided. |
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 4D14 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 4D14 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 4D14 cover?
The manufacturer filed it against 2 model years: 2021 Volkswagen Jetta, 2020 Volkswagen Jetta. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.