TSB 24TT — Volkswagen Service campaign
24TT is a service campaign on file with NHTSA for the Volkswagen Tiguan, 2026 model years, filed and re-filed as 2 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Under this service action, updated engine control module (ECM) software will be installed to provide robustness improvements to the ECM calibration for the turbocharger variable turbine geometry (VTG) actuator endpoints. This has no impact on vehicle emissions.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. 24TT is filed as a service campaign, which unlike an ordinary bulletin can mean free or reimbursed work when a vehicle qualifies. Ask a dealer using the document ID below, and check open recalls separately at nhtsa.gov/recalls.
Vehicles and model years 24TT names
| Vehicle | Model years |
|---|---|
| Volkswagen Tiguan | 2026 |
Every document filed under 24TT
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| Circular 24TT | April 16, 2026 | Service campaign |
| Dealer 24TT | April 16, 2026 | Service campaign |
What 24TT covers
Engine — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 24TT?
24TT is a service campaign filed with NHTSA by Volkswagen, covering the Volkswagen Tiguan across the 2026 model years. NHTSA's summary reads: Under this service action, updated engine control module (ECM) software will be installed to provide robustness improvements to the ECM calibration for the turbocharger variable turbine geometry (VTG) actuator endpoints. This has no impact on vehicle emissions.
Which vehicles does 24TT cover?
NHTSA's file names Volkswagen Tiguan (2026). 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 24TT a recall, and is the repair free?
24TT is filed as a service campaign, not a recall — but this is the kind of communication that can mean free or reimbursed work if your VIN qualifies. Take the number to a dealer and ask. Recalls are separate and always free; check yours by VIN at nhtsa.gov/recalls.
How do I get the full text of 24TT?
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 24TT, 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 24TT. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.