Genesis warranty extension L18G
What it saysCertain 2026MY G70 (IK) and 2027MY G80 (RG3) vehicles may exhibit a water-flowing or gurgling noise from the front center air vents during engine start-up. NHTSA’s full summary ↓
Genesis filed this with NHTSA as a warranty extension dated Jul 30, 2026, received Aug 11, 2026, about the engine — 1 document under this number: 26-01-064G DCS. It names 2 model years (2026–2027). A warranty extension is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
Certain 2026MY G70 (IK) and 2027MY G80 (RG3) vehicles may exhibit a water-flowing or gurgling noise from the front center air vents during engine start-up. This condition may becaused by trapped air within the engine cooling system. Technical Service Bulletin (TSB) 26-01-064G provides instructions to properly bleed the cooling system and remove any trapped air.
One of the 432 warranty extensions and special-coverage programs on file — every make, with the term each runs to.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 26-01-064G DCS | Warranty extension | Jul 30, 2026 | 11036092 |
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 29 complaints with NHTSA since 2015. 4 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.
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 group9 other manufacturer communications filed against these Genesis models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Genesis list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LA18 | Warranty extension | Jul 30, 2026 | Certain 2026MY G70 (IK) and 2027MY G80 (RG3) vehicles may exhibit a water-flowing or gurgling noise from the front center air vents during e… |
| 26-HA-002G | Service bulletin | Jun 10, 2026 | Some Genesis vehicles (listed below) equipped with Lambda-III 3.5T-GDI engines may exhibit reduced heater performance due to engine coolant… |
| 26-EE-003G | Service bulletin | Apr 18, 2026 | Some vehicles may exhibit difficulty starting in cold weather. This bulletin provides the procedure to perform an inspection on the starter… |
| 26-EM-008G | Service bulletin | Mar 2, 2026 | Some GV70 (JK1A) vehicles equipped with 2.5T engines may display a check engine light with DTC P04F000… |
| 914G | Service campaign | Nov 13, 2025 | This notice is being sent to you as our records indicate you may have previously received an important Service Campaign notice for Genesis C… |
| 916G | Service campaign | Oct 17, 2025 | Certain GV70 (JK1A) vehicles equipped with 3.5 T-GDI Lambda III engines may exhibit a malfunction indicator light with DTC P26CB00… |
| 914G OL | Service campaign | Sep 20, 2025 | Genesis has become aware that some vehicles may illuminate the Check Engine Light indicator as a result of detected engine misfires. |
| 23-FL-006G | Service bulletin | Oct 9, 2023 | Neutral Coasting Mode may not activate under certain conditions when the battery State of Charge (SOC) is less than 75%. This update revises… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Genesis, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Genesis L18G a recall?
No. A warranty extension 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 L18G repair free?
A warranty extension is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does L18G cover?
The manufacturer filed it against 2 model years: 2027 Genesis G80, 2026 Genesis GV70. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: built 23 May 2026 – 10 Jun 2026; built 2 Jun 2026 – 9 Jun 2026 — the build date is on the certification label in the driver’s door jamb.