ClaimRight · Warranty Denial Guides
Hyundai Sonata warranty claim denied?
761 manufacturer communications on file
9 warranty extensions / campaigns 1986–2025 model years covered
If Hyundai just denied your Sonata's warranty claim, you're not alone — and the denial isn't necessarily the final word. Manufacturers file official communications with NHTSA when they identify recurring problems, and Hyundai has submitted 761 such filings for the Sonata across its production years, including 9 formal warranty extensions or service campaigns. These cover a range of documented issues, from rear combination lamp housings causing inoperative brake lights on 2011-14 models, to engine long block concerns addressed through extended coverage, to motor-driven power steering coupling issues on other model years. When a documented defect matches your vehicle's symptoms, model year, and mileage, a prior denial can sometimes be reconsidered — especially when the claim is supported by the manufacturer's own service communications rather than a general request. Dealers process thousands of claims and don't always cross-reference every applicable bulletin or extension at the point of denial. That's where a closer look helps. ClaimRight offers a free assessment of your situation: we review your paperwork, compare it against publicly filed manufacturer communications for your specific Sonata, and let you know what options may be available. There's no obligation, and no cost unless we're able to help.
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What Hyundai has documented for the Sonata
Filed with NHTSA by the manufacturer. Warranty extensions are the strongest signal — the manufacturer acknowledging a defect and extending coverage for it.
2024-09-09 · 24-01-073H
Warranty extension Some 2011-14MY Sonata (YF) vehicles may exhibit inoperative brake lights that may be caused by melting/deformation of the rear combination housing lamps. Hyundai is extending warr...
Official NHTSA document →
2023-12-05 · 23-01-089H
Warranty extension Some 2011-14MY Sonata (YF) vehicles may experience inoperative brake lights that may be caused by melting/deformation of the rear combination housing lamps. Hyundai is extending wa...
Official NHTSA document →
2023-06-29 · 23-FL-004H
Warranty extension Certain 2015-2019MY Sonata (LFA) vehicles may intermittently exhibit reduced engine power, a âCrank/No Startâ condition, and/or have DTC P1233 stored in the ECM due to an inter...
Official NHTSA document →
2020-02-18 · Campaign 953 Dea
Warranty extension Hyundai has developed a new engine monitoring technology called a Knock Sensor Detection System (KSDS). The technology uses software innovations and leverages existing engine senso...
Official NHTSA document →
2019-02-15 · 953 Dealer Best
Warranty extension Hyundai has developed a new engine monitoring technology called a Knock Sensor Detection System (KSDS). The technology uses software innovations and leverages existing engine senso...
Official NHTSA document →
2018-12-12 · 5NP-Q7C7X-01
Warranty extension The warranty coverage for the engine long block has been extended to 10 years or 120,000 miles from the date of original retail delivery or date of first use, whichever occurs firs...
Official NHTSA document →
2018-11-02 · 5NP-R7Q5Y-12
Warranty extension Hyundai is providing extended warranty coverage to both new and used vehicle owners for engine long block assembly repairs needed due to excessive connecting rod bearing damage upo...
Official NHTSA document →
2017-02-27 · 5NP-F8M5G-03
Warranty extension Hyundai has announced an extended warranty for the motor driven power steering (MDPS) coupling on the following vehicles: ? 2011-2014 Sonata (YFa), 2011-2014 Sonata Hybrid (YF HEV...
Official NHTSA document →
2016-05-18 · 5NP-U9G4Z-09
Warranty extension THIS BULLETIN PROVIDES WARRANTY EXTENSION INFORMATION REGARDING THE ENGINE SHORT BLOCK ASSEMBLY (CONSISTING OF THE ENGINE BLOCK, CRANKSHAFT AND BEARINGS, CONNECTING RODS AND BEARIN...
Official NHTSA document →
2024-12-14 · 24-01-093H
Certain Sonata (DN8) and Sonata Hybrid (DN8 HEV) vehicles may exhibit DTC C2A274B due to the rear corner radar missing the outside temperature input from the ADAS sensor. Follow th...
Official NHTSA document →
2024-12-10 · 9B1 OL
The subject vehicles may have Diagnostic Trouble Code (DTC) P0451 stored in the ECU, which could cause the Check Engine Lamp to come on.
Official NHTSA document →
2024-11-14 · 24-01-020H DBP
Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have Diagnostic Trouble Code (DTC) P0451 stored in the Electronic Control Unit (ECU). The California Air...
Official NHTSA document →
2024-11-14 · 24-01-020H TSB
Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have DTC P0451 stored in the ECU. Follow this bulletin to inspect the check valve, fuel pump cover and f...
Official NHTSA document →
2024-10-22 · 24-01-080H OL
Hyundai has become aware that the subject vehicles may contain a faulty sensor in the EGR valve assembly which could potentially result in an electrical short. An electrical short...
Official NHTSA document →
2024-09-25 · 24-01-080H
The exhaust gas recirculation (EGR) valve assembly in certain vehicles may contain a sensor that was contaminated with solder flux during manufacturing, which could potentially res...
Official NHTSA document →
2024-09-23 · 24-BE-013H
Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Connected Car Service (CCS) functions. This may be due to an occasional disconnection on Ve...
Official NHTSA document →
2024-09-12 · 24-01-045H-2
A software update is available for multiple vehicles equipped with either Display Audio 2.0V or the AVN 5th Gen Wide system.
Official NHTSA document →
2024-09-11 · 24-01-050H-1
This bulletin provides instructions to update the 4th generation AVN head unit software to ensure the SIM Over The Air function for the Bluelink service is operating properly.
Official NHTSA document →
2024-08-28 · 24-01-045H-1
A software update is available for multiple vehicles equipped with either Display Audio 2.0V or the AVN 5th Gen Wide system.
Official NHTSA document →
2024-07-23 · 24-EM-001H
Certain 20-22MY Sonata (DN8a), 21-23MY Santa Fe (TMa), and 22-23MY Tucson (NX4a) vehicles may experience a warning lamp illumination for a diagnostic trouble code P2181 that is rel...
Official NHTSA document →
2024-07-19 · 24-BE-001H-1
Some vehicles equipped with the AVN 5th Gen Wide system may exhibit a condition where the radio app crashes frequently when entering radio mode and/or displays a message that reads...
Official NHTSA document →
2024-06-29 · 24-01-050H
This bulletin provides instructions to update the 4th generation AVN head unit software to ensure the SIM Over The Air function for the Bluelink service is operating properly.
Official NHTSA document →
2024-06-12 · 24-01-045H
A software update is available for multiple vehicles equipped with either Display Audio 2.0V or the AVN 5th Gen Wide system.
Official NHTSA document →
2024-05-10 · 24-01-009H-1
A class settlement against Hyundai Motor America (“HMA”) that had alleged that certain 2011 – 2022 model year Hyundai vehicles that were not equipped with an engine immobilizer (ca...
Official NHTSA document →
2024-04-09 · 24-AT-002H
This TSB provides a procedure to diagnose and replace, if necessary, an automatic transmission with Incorrect Ratio DTC (transmission clutch slip in gear above limit) listed on Pag...
Official NHTSA document →
Common questions
Why was my Hyundai Sonata warranty claim denied?
Claims are denied for many reasons — the dealer may have determined the issue wasn't covered, that it resulted from wear rather than a defect, or that documentation was incomplete. Denials don't always account for manufacturer-issued service communications or extended warranty coverage tied to specific components, which is why a documented review of your case can clarify what options remain.
What is a warranty extension and does it apply to my vehicle?
A warranty extension is a manufacturer-issued notice that lengthens coverage for a specific part or system beyond the original warranty terms, usually because a recurring issue was identified. Hyundai has filed several of these for the Sonata, covering components like rear lamp housings, engine long blocks, and steering couplings. Whether one applies depends on your model year, mileage, and the specific symptoms your vehicle experienced.
Can a denied warranty claim be reopened or reconsidered?
In some cases, yes. If a documented service bulletin or warranty extension applies to your vehicle's model year and issue, that information can support a request for reconsideration. There's no guarantee of a particular outcome, but claims are sometimes revisited when supported by manufacturer records rather than resubmitted without additional documentation.
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