Kia warranty extension WTY035
What it saysCAMPAIGN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY035) - This bulletin has been revised to include additional information. NHTSA’s full summary ↓
Kia filed this with NHTSA as a warranty extension dated Oct 8, 2025, received Jan 6, 2024, about the engine — 6 documents under this number: WTY035_TSB_R3, WTY035_TSB_R2, WTY035_TSB_R1, WTY035_TSB and 2 more. It names 2 model years (2016–2017). 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: WARRANTY EXTENSION CAMPAIGN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY035) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY035) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub-assembly on 2016-2017MY Sorento (UMa) vehicles equipped with 3.3L GDI Lambda II produced from October 27, 2014 through April 13, 2017. Under certain severe operating conditions and over time, the engine in the subject vehicles may develop a coolant leak from the cylinder head gasket area. If the vehicle continues to be driven in the unrepaired condition, the engine may overheat and become further damaged. The customer may experience an engine concern including, but not limited to, a coolant leak, coolant smell, and/or engine temperature indicator near the “H” mark on the instrument cluster. The warranty coverage for related repairs will be extended from 5 years / 60,000 miles to 15 years / 180,000 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 |
|---|---|---|---|---|
| WTY035_TSB_R3 | Warranty extension | Oct 8, 2025 | 11024184 | PDF, 686 KB |
| WTY035_TSB_R2 | Service bulletin | Nov 5, 2024 | 11010124 | PDF, 520 KB |
| WTY035_TSB_R1 | Service bulletin | Aug 15, 2024 | 11006551 | PDF, 430 KB |
| WTY035_TSB | Warranty extension | Jun 13, 2024 | 11001605 | PDF, 463 KB |
| WTY035_OWNR | Service bulletin | Dec 15, 2023 | 10248082 | not found |
| WTY035_QA | Service bulletin | Dec 13, 2023 | 10248083 | not found |
What the document itself lists
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 242A16I0 | — | 0.7 hrs |
| 242A16R0 | Engine Inspection (Fail) + Engine Sub- Assembly Replacement (FWD) | 8.9 hrs |
| 242A16R1 | Engine Inspection (Fail) + Engine Sub- Assembly Replacement (AWD) | 9.3 hrs |
| 242A16R4 | Engine Inspection (Fail) + Engine Sub- Assembly Replacement (FWD) | 8.9 hrs |
| 242A16R5 | Engine Inspection (Fail) + Engine Sub- Assembly Replacement (AWD) | 9.3 hrs |
Read by machine from the document NHTSA serves (7 pages), read Sep 30, 2026. A part number is shown only where it matches Kia’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.
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 2,070 complaints with NHTSA since 2015. 1,143 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.
On the 2016 Kia Sorento, the 203 owners who gave an odometer reading for Engine reported it at a median of 85,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
On four different ocasions this vehicle completely died each time while going different speeds. One of these times I was in high speed traffic on an expressway, almost causing a wreck.
2017 Kia Sorento · Engine · filed with NHTSA Jan 15, 2018 · ODI 11062773
In depth: 2017 Kia Sorento engine problems → · 2016 Kia Sorento engine problems →
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 group17 other manufacturer communications filed against the Kia Sorento under the same component group (engine), newest first. The eight newest are listed; the rest are on the Kia list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SC365 | Emissions | Sep 10, 2026 | TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: This bulletin provides the procedure to update the emissions‑related logic… |
| SC340 | Emissions | Apr 4, 2026 | VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS: ECM LOGIC IMPROVEMENT (SC340 REVISION 5) - This bulletin has been revised… |
| CA2516 | Service bulletin | Apr 1, 2026 | TECHNICAL SERVICE BULLETIN: CUSTOMER ACTION: ECU LOGIC IMPROVEMENT FOR DTC P2B59F0 (CA2516) - This bulletin provides information to upgrade… |
| WTY026_QA | Service bulletin | Mar 18, 2026 | TECHNICAL SERVICE BULLETIN: OIL PRESSURE SWITCH (OPS) REPLACEMENT - This bulletin has been revised to include additional information. New/re… |
| SC325 | Emissions | Feb 20, 2026 | TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: AEWP INSPECTION AND REPLACEMENT (SC325) - This bulletin has been revised t… |
| DC26 | Service campaign | Feb 10, 2026 | TECHNICAL SERVICE BULLETIN: DATA COLLECTION: EXTRACT CALIFORNIA EMISSIONS DATA FROM ECU (DC26) - This bulletin has been revised to include a… |
| CA2508 | Service bulletin | Dec 8, 2025 | TECHNICAL SERVICE BULLETIN: ITM REPLACEMENT AND ECM & TCM LOGIC IMPROVEMENT (CA2508) - This bulletin provides information to replace the Int… |
| SC353 | Service campaign | Nov 13, 2025 | TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: ENGINE REPLACEMENT FOR COOLANT LEAK (SC353) - This bulletin provides information to… |
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 WTY035 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 WTY035 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 WTY035 cover?
The manufacturer filed it against 2 model years: 2017 Kia Sorento, 2016 Kia Sorento. 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: 2016-2017MY Sorento (UMa): built on or after 27 Oct 2014; Sorento (UMa): built 27 Oct 2014 – 13 Apr 2017 — the build date is on the certification label in the driver’s door jamb.