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Service campaign Circular 21ZV

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService campaign
NHTSA id11023830
Published by NHTSA2025-10-03
Manufacturer's numberCircular 21ZV
Manufacturer's date2025-09-09
Campaign id or software version21ZV
NHTSA componentENGINE

NHTSA's summary

In affected vehicles, the turbocharger housing included an unintended and unused hose port. To avoid possible oil seepage or a small air leak over time, Volkswagen will proactively replace the turbocharger. Based on engineering judgement, this incorrect part is not anticipated to impact performance, fuel consumption, or emissions.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
VOLKSWAGEN JETTA2024
VOLKSWAGEN TAOS2024

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
V0116152014815_202026-10-06. Service bulletin. Suggested fuel additive
V1718062017813_242026-08-05. Service bulletin. Oil Consumption Measurement and Electronic Oil Consumption Measurement
V1719012012855_812026-07-07. Service bulletin. Volkswagen Engine Oil Standards
V0125042078297_52026-07-07. Service bulletin. Update programming for Evap Emission Control System
TT 13-20-01_32026-07-07. Service bulletin. Instruction, how to lubicate engine before initial start.
TT 10-18-02_22026-07-07. Service bulletin. Lubricating engine components before reassembly.
VOS-26-212026-04-06. Service bulletin. This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: A software fix is needed to correct the error message ERP0204E could occur during perform initial operation, software configuration, SVM updates for any control module(s) etc.
V0125042078397_42026-01-07. Service bulletin. Engine/Motor Control Module software update for DTC 0456
SM 57-20252025-12-05. Other. This special notice is to inform dealers to return the parts listed and only order the successor parts going forward.
WLA-25-112025-11-10. Service bulletin. Coolant Bleed Procedure