Volkswagen bulletin Closure 66L4
What it saysIn certain situations, water may leak through the seam in the under hood cowl and into the vehicle interior. NHTSA’s full summary ↓
Volkswagen filed this with NHTSA as a service bulletin dated Dec 11, 2023, received Jan 4, 2024, about the structure. It names 1 model year (2020). 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 communicationIn certain situations, water may leak through the seam in the under hood cowl and into the vehicle interior. Closure notice
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| Closure 66L4 | Service bulletin | Dec 11, 2023 | 10247531 | not found |
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 1 model year this bulletin names have filed 141 complaints with NHTSA since 2015. 16 of them name Structure — 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.
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 structure
Source: same model, same component group6 other manufacturer communications filed against the Volkswagen Tiguan under the same component group (structure), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SM 31-2026 | Other | Jul 6, 2026 | This special notice is to inform dealers to return the parts listed if it meets the criteria provided. |
| V0019012040590_14 | Service bulletin | Feb 5, 2025 | Water migration under the RAPGARD® protection when vehicle arrives at dealership. |
| DC 60E260E5_EXP2 | Service bulletin | Mar 26, 2024 | In some sunroof-equipped vehicles, the front sunroof drains can become blocked with moist debris. If this happens, water could leak into the… |
| VIN4APIN20240318 | Service bulletin | Mar 18, 2024 | Customer states rattle from below the vehicle Customer states MIL-on, P0442 stored in ECM memory Customer states Mill-on, P0462 and/or P04… |
| VIN4APIN20240311 | Service bulletin | Mar 11, 2024 | Customer states rattle from below the vehicle Customer states MIL-on, P0442 stored in ECM memory Customer states Mill-on, P0462 and/or P04… |
| V001807203693521 | Service bulletin | May 30, 2023 | Handling instruction for accessory pack components during perfect delivery inspection (PDI). |
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 Closure 66L4 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 Closure 66L4 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 Closure 66L4 cover?
The manufacturer filed it against 1 model year: 2020 Volkswagen Tiguan. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.