Hyundai issued Technical Service Bulletin (TSB 26-01-060H) to address a potentially loose automatic transmission oil level plug on certain Hyundai Sonata vehicles. Hyundai identifies the service action as Limited Coverage Campaign LA15.
The campaign applies to certain 2025–2026 Hyundai Sonata (DN8) vehicles equipped with the 2.5-liter engine and produced from February 4, 2025, through July 17, 2025. Not every Sonata from these model years is included, so eligibility must be confirmed using the vehicle identification number, or VIN.
World Hyundai Matteson can help Sonata owners verify whether their vehicle is included in Campaign LA15 and arrange the appropriate inspection or repair.
In some affected vehicles, the transmission oil-level plug may not be properly secured. This could allow transmission fluid to leak and, if left unaddressed, may lead to transmission damage.
The inspection allows our technicians to check the plug, look for signs of leakage, verify the transmission fluid level, and determine whether additional service is required.
The remedy is available now, so there is no need to delay scheduling your appointment.
1) Contact World Hyundai Matteson: Provide our service team with:
We’ll check Hyundai’s campaign system to confirm whether Campaign LA15 applies to your Sonata.
2) Schedule the inspection: The campaign begins with an inspection of the transmission oil-level plug, surrounding area, and fluid level. The inspection will determine whether any additional service is needed.
3) Review the findings and timing: Our team will explain what was found, what service is recommended, and the expected completion time. Timing may vary depending on the inspection results, parts availability, and shop capacity.
4) Keep your service documentation: Retain the repair order showing that Campaign LA15 was inspected or completed for your maintenance records and future reference.
The remedy for Campaign LA15 is available now. Contact World Hyundai Matteson to verify your VIN, schedule the inspection, and get clear answers about your vehicle.
At World Hyundai Matteson, customer safety is our highest priority.
Our Hyundai-certified technicians are fully trained and will use genuine Hyundai parts to ensure your Sonata meets factory standards once the remedy is performed.
Q: What is Hyundai TSB 26-01-060H?
A: TSB 26-01-060H is a Hyundai Technical Service Bulletin issued in July 2026. It provides dealer instructions for inspecting and repairing a potentially loose transmission oil level plug on certain 2025–2026 Hyundai Sonata vehicles. The associated service action is identified as Limited Coverage Campaign LA15.
Q: Which Hyundai Sonata vehicles are affected by Campaign LA15?
A: The bulletin applies to certain 2025–2026 Sonata DN8 vehicles with a 2.5L engine produced from February 4, 2025, through July 17, 2025. A dealership must check the VIN because not every Sonata within those model years or production dates is necessarily included.
Q: Is Campaign LA15 a Hyundai recall?
A: Hyundai identifies LA15 in the bulletin as a Limited Coverage Campaign. The provided TSB does not label it as a federal safety recall. Owners should use the bulletin and campaign numbers when contacting a Hyundai dealer so the correct service action can be located.
Q: What could happen if the transmission oil level plug is loose?
A: A loose plug may allow transmission oil to leak from the bottom of the valve body cover. Hyundai states that continued fluid loss could potentially result in total failure of the automatic transmission.
Q: Will every affected Sonata need a new transmission?
A: No. Hyundai’s procedure begins with an inspection. If the plug is present and there is no leak, it may only need to be properly tightened. If a leak is found, the technician checks the transmission fluid level and may replace the gasket or related components. Transmission replacement is required when the plug is missing or the specified fluid-level procedure indicates that replacement is necessary.
Q: Is the Campaign LA15 repair covered by Hyundai?
A: The applicable repairs are covered within the 10-year/100,000-mile Powertrain Limited Warranty for original owners and the 5-year/60,000-mile New Vehicle Limited Warranty for subsequent owners. Eligibility depends on mileage, warranty start date, ownership status and the vehicle’s campaign status. For vehicles outside the stated coverage, you may request a goodwill consideration from Hyundai on a case-by-case basis. Approval is not automatic.
Q: Can I continue driving before the inspection?
A: The bulletin does not provide a blanket instruction requiring all owners to stop driving. However, an active transmission-fluid leak or unusual transmission operation should not be ignored. Contact World Hyundai Matteson for guidance, especially if you observe leaking fluid, warning messages or significant changes in shifting.
Q: How long does the inspection or repair take?
A: Labor times range from about 0.3 labor hour for an inspection with no leak to more than five labor hours when transmission replacement and an alignment check are required. Actual appointment length can be longer because of diagnosis, parts availability and dealership scheduling.
Q: Can World Hyundai Matteson check whether my Sonata is included?
A: Yes. World Hyundai Matteson can use your VIN, mileage and warranty information to check whether Campaign LA15 applies and determine which Hyundai service procedure is required.
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Disclaimer
The information provided on this page is based on official communications from Hyundai Motor America regarding Technical Service Bulletin (TSB 26-01-060H). For the most current information, please contact Hyundai Motor America or the World Hyundai Matteson Service Department.
