# 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.

- Type: Service campaign
- NHTSA id: 11023830
- Published by NHTSA: 2025\-10\-03
- Manufacturer's number: Circular 21ZV
- Manufacturer's date: 2025\-09\-09
- Campaign id or software version: 21ZV
- NHTSA component: ENGINE

## 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023830-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023830-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2024 VOLKSWAGEN JETTA
- 2024 VOLKSWAGEN TAOS

## Other bulletins for the same vehicles and component

- [V0116152014815\_20](/bulletins/11038146.md), 2026-10-06, Service bulletin: ENGINE. Suggested fuel additive
- [V1718062017813\_24](/bulletins/11035762.md), 2026-08-05, Service bulletin: ENGINE. Oil Consumption Measurement and Electronic Oil Consumption Measurement
- [V1719012012855\_81](/bulletins/11034617.md), 2026-07-07, Service bulletin: ENGINE. Volkswagen Engine Oil Standards
- [V0125042078297\_5](/bulletins/11034615.md), 2026-07-07, Service bulletin: ENGINE. Update programming for Evap Emission Control System
- [TT 13\-20\-01\_3](/bulletins/11034614.md), 2026-07-07, Service bulletin: ENGINE. Instruction, how to lubicate engine before initial start.
- [TT 10\-18\-02\_2](/bulletins/11034613.md), 2026-07-07, Service bulletin: ENGINE. Lubricating engine components before reassembly.
- [VOS\-26\-21](/bulletins/11030847.md), 2026-04-06, Service bulletin: ENGINE. 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\_4](/bulletins/11027251.md), 2026-01-07, Service bulletin: ENGINE. Engine/Motor Control Module software update for DTC 0456
- [SM 57\-2025](/bulletins/11026170.md), 2025-12-05, Other: ENGINE. This special notice is to inform dealers to return the parts listed and only order the successor parts going forward.
- [WLA\-25\-11](/bulletins/11025452.md), 2025-11-10, Service bulletin: ENGINE. Coolant Bleed Procedure

JSON: [/v1/bulletins/11023830](/v1/bulletins/11023830)

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