Kia warranty extension WTY048
What it saysThis bulletin provides information associated with the Warranty Extension Program (WTY048) to inspect and, if necessary, replace both the high-pitch and low-pitch horn assemblies on certain 2022-2024MY Carnival (KA4)… NHTSA’s full summary ↓
Kia filed this with NHTSA as a warranty extension dated Aug 25, 2026, received Sep 2, 2026, about the electrical system — 5 documents under this number: WTY048_OWNR, WTY048_DP, WTY048_TSB, WTY048_QA and 1 more. It names 3 model years (2022–2024). 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 communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
What 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.
TECHNICAL SERVICE BULLETIN: HORN ASSEMBLY INSPECTION/REPLACEMENT (WTY048) - This bulletin provides information associated with the Warranty Extension Program (WTY048) to inspect and, if necessary, replace both the high-pitch and low-pitch horn assemblies on certain 2022-2024MY Carnival (KA4) vehicles produced from January 4, 2021 through July 4, 2024. The affected vehicles may experience a distorted or inoperative horn sound caused by excessive moisture and dust exposure over time. The warranty coverage for repairs related to the horn assembly has been extended from 5 years / 60,000 miles to 10 years / 120,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
One of the 432 warranty extensions and special-coverage programs on file — every make, with the term each runs to.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| WTY048_OWNR | Warranty extension | Aug 25, 2026 | 11036711 | PDF, 111 KB |
| WTY048_DP | Warranty extension | Aug 21, 2026 | 11036631 | PDF, 65 KB |
| WTY048_TSB | Service bulletin | Aug 20, 2026 | 11036722 | PDF, 304 KB |
| WTY048_QA | Warranty extension | Aug 20, 2026 | 11036721 | PDF, 78 KB |
| WTY048_DPSM | Warranty extension | Aug 20, 2026 | 11036701 | PDF, 67 KB |
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 263 complaints with NHTSA since 2015. 47 of them name Electrical 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.
The contact owns 2022 Kia Carnival LX. The contact stated that while driving at 55 MPH, the engine misfired, and the check engine warning light was illuminated. In addition, the vehicle would shudder when warming up. The vehicle was driven to local repair and diagnosed several times with the same failure, but not repaired.
2022 Kia Carnival · Electrical System · filed with NHTSA Mar 4, 2022 · ODI 11455242
Purchased new KIA Carnival in May 2024. In August 2024 ALL of the warning lights came on and started cycling through to check every system. The warnings were the only thing that worked on the instrument cluster. All of the analog instruments stopped working: the speedometer, the tachometer, the fuel gauge, etc..
2024 Kia Carnival · Electrical System · filed with NHTSA Mar 2, 2025 · ODI 11645778
Purchased in Aug 2022 brand new I express concern very early on that the back door would reopen after starting the car I express concern about shifting/breaking being automatic/ice light coming on when you hit bumps coming in parking lots and the doors not unlocking.
2023 Kia Carnival · Electrical System · filed with NHTSA Jul 28, 2023 · ODI 11535166
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 electrical system
Source: same model, same component group32 other manufacturer communications filed against the Kia Carnival under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Kia list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| ELE413 | Over-the-air update | Jun 18, 2026 | RELEASE NOTES: OVER-THE-AIR: SOFWARE UPDATE FOR DATA CONNECTIVITY (ELE413) - This Over-the-Air (OTA) software update is designed to update t… |
| TSB_ELE422 | Service bulletin | May 28, 2026 | TECHNICAL SERVICE BULLETIN: INFOTAINMENT SYSTEM SOFTWARE UPDATE USING UPDATE. KIA. COM - This bulletin provides information and service proc… |
| TSB_ELE417 | Service bulletin | Apr 14, 2026 | TECHNICAL SERVICE BULLETIN: INFOTAINMENT SOFTWARE UPDATE PROCEDURE - This bulletin provides information on the process for downloading infot… |
| TSB_ELE413 | Service bulletin | Mar 20, 2026 | TECHNICAL SERVICE BULLETIN: DCU COMMUNICATION LOGIC IMPROVEMENT - This bulletin provides the procedure to upgrade the Data Connectivity Unit… |
| PS807 | Service bulletin | Mar 5, 2026 | PITSTOP: TECHNICAL OPERATIONS: CCU FUSE OPEN AFTER WIRING HARNESS REPLACEMENT - This Pitstop provides information regarding a condition on 2… |
| PS798 | Other | Jan 15, 2026 | PITSTOP: TECHNICAL OPERATIONS: CCRC WITH DTC B281600 (PS798) - This Pitstop provides information regarding DTC B281600 stored on some 2025… |
| SC352 | Service campaign | Nov 13, 2025 | VOLUNTARY SERVICE CAMPAIGN: HVAC SOFTWARE UPGRADE FOR PTC OPERATION LOGIC IMPROVEMENT (SC352) - This bulletin provides information to upgrad… |
| PS788 | Other | Sep 12, 2025 | PITSTOP: TECHNICAL OPERATIONS: FUEL FILLER DOOR ACTUATOR REPLACEMENT - This Pitstop provides information regarding the replacement of the fu… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Kia, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Kia WTY048 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 WTY048 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 WTY048 cover?
The manufacturer filed it against 3 model years: 2024 Kia Carnival, 2023 Kia Carnival, 2022 Kia Carnival. 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: 2022-2024 MY Carnival: built 4 Jan 2021 – 4 Jul 2024 — the build date is on the certification label in the driver’s door jamb.