# Warranty extension 26\-01\-060H WebDCS

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Warranty extension
- NHTSA id: 11036093
- Published by NHTSA: 2026\-08\-11
- Manufacturer's number: 26\-01\-060H WebDCS
- Manufacturer's date: 2026\-07\-27
- Campaign id or software version: LA15
- NHTSA component: POWER TRAIN

## NHTSA's summary

Certain Sonata \(DN8\) vehicles may exhibit a transmission oil leak at the bottom of the valve body cover due to a loose oil level plug that could potentially lead to a total failure of the automatic transmission. Technical Service Bulletin \(TSB\) 26\-01\-060H instructions to inspect the oil level plug and transmission oil level and, if necessary, replace the automatic transmission.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036093-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036093-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline

## Vehicles listed

- 2025 to 2026 HYUNDAI SONATA

## Other bulletins for the same vehicles and component

- [26\-01\-060H TSB](/bulletins/11036095.md), 2026-08-11, Warranty extension: POWER TRAIN. Certain Sonata \(DN8\) vehicles may exhibit a transmission oil leak at the bottom of the valve body cover due to a loose oil level plug that could potentially lead to a total failure of the automatic transmission. This bulletin provides instructions to inspect the oil level plug and transmission oil level and, if necessary, replace the automatic transmission.
- [26\-AT\-005H TSB](/bulletins/11033840.md), 2026-06-16, Service bulletin: POWER TRAIN. This bulletin provides information related to a Transmission Control Unit \(TCU\) software update for some vehicles equipped with an 8\-speed wet dual clutch transmission \(8WDCT\). The software update revises the touch point learning variation, improving drivability and judder symptoms. Some 8WDCTs \(indicated by a new part number\) received an updated clutch spring. The correct TCU software update must be matched with the correct corresponding 8WDCT hardware, otherwise, drivability concerns may occur. This service procedure should be performed prior to any 8WDCT replacements done for drivability/judder concerns.

JSON: [/v1/bulletins/11036093](/v1/bulletins/11036093)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Warranty%20extension%2026-01-060H%20WebDCS&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11036093&vehicle=Warranty%20extension%2026-01-060H%20WebDCS)