TSB 16-157-26 — Subaru Service bulletin
16-157-26 is a service bulletin on file with NHTSA for 4 Subaru models, 2019–2025 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. This bulletin announces a design change to the TR690 CVT control valve body which features an enhanced line pressure sensor O-ring, designed to prevent abnormal sensor readings caused by O-ring leakage.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years 16-157-26 names
| Vehicle | Model years |
|---|---|
| Subaru Ascent | 2019, 2020, 2021, 2022, 2025 |
| Subaru Legacy | 2020, 2021, 2022, 2023, 2024, 2025 |
| Subaru Outback | 2020, 2021, 2022, 2023, 2024, 2025 |
| Subaru WRX | 2023, 2024, 2025 |
Every document filed under 16-157-26
| Document ID | Filed | Type |
|---|---|---|
| 16-157-26 | May 12, 2026 | Service bulletin |
What 16-157-26 covers
Transmission & drivetrain, Electrical — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 16-157-26?
16-157-26 is a service bulletin filed with NHTSA by Subaru, covering 4 Subaru models across the 2019–2025 model years. NHTSA's summary reads: This bulletin announces a design change to the TR690 CVT control valve body which features an enhanced line pressure sensor O-ring, designed to prevent abnormal sensor readings caused by O-ring leakage.
Which vehicles does 16-157-26 cover?
NHTSA's file names Subaru Ascent (2019–2022, 2025); Subaru Legacy (2020–2025); Subaru Outback (2020–2025); Subaru WRX (2023–2025). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB 16-157-26 a recall, and is the repair free?
No. 16-157-26 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of 16-157-26?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under 16-157-26, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under 16-157-26. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.