# Service bulletin Circular 91BM

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 bulletin
- NHTSA id: 10190519
- Published by NHTSA: 2021\-05\-06
- Manufacturer's number: Circular 91BM
- Manufacturer's date: 2021\-04\-13
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

As indicated on the Monroney label at the time of retail sale, the vehicles included in this service action were sold before July 1, 2020 with a non\-functioning Car\-Net Operating Control Unit \(OCU\). Purchasers were advised that a functioning OCU would be installed free of charge once parts became available.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190519-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190519-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2020 VOLKSWAGEN PASSAT

## Other bulletins for the same vehicles and component

- [VOS\-26\-42](/bulletins/11035772.md), 2026-08-05, Service bulletin: ELECTRICAL SYSTEM. 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 issue: DA 0019 \- Hotfix 12\-V battery test\(s\) – No battery diagnosis \- Inconclusive test result.
- [VOS\-26\-15](/bulletins/11030829.md), 2026-04-06, Service bulletin: ELECTRICAL SYSTEM. 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 multiple test plans: All basic settings test for the following components \- Fill and bleed cooling system issue, N493, J338, Camshaft, V465 etc. Use this test for all the basic setting. You will need to select the component you need to run the basic settings. But there are also stand\-alone tests for each of those components.
- [VOS\-26\-01](/bulletins/11028490.md), 2026-02-06, Service bulletin: ELECTRICAL SYSTEM. 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 a test that is not reading any information from the battery data module \(BDM\) and will output:
- [V2715032016076\_13](/bulletins/11027254.md), 2026-01-07, Service bulletin: ELECTRICAL SYSTEM. Diagnosis for Excessive Current Draw.
- [V9124052074273\_6](/bulletins/11026186.md), 2025-12-05, Service bulletin: ELECTRICAL SYSTEM. A "How To" activate Car Net® 2.0 \- Emergency Call Module and Communication Unit \-J949\-Vehicle is Offline \(Not Connected\)
- [V9124052074273\_5](/bulletins/11022722.md), 2025-09-04, Service bulletin: ELECTRICAL SYSTEM. Activation
- [V9419012011521\_20](/bulletins/11012470.md), 2025-01-07, Service bulletin: ELECTRICAL SYSTEM. Internal Moisture Accumulation
- [V9124052074273\_3](/bulletins/11010025.md), 2024-11-06, Service bulletin: ELECTRICAL SYSTEM. Green Light Does Not Illuminate
- [V271901201189426](/bulletins/11007398.md), 2024-09-06, Service bulletin: ELECTRICAL SYSTEM. Battery testing
- [V9124052074273\_2](/bulletins/11007396.md), 2024-09-06, Service bulletin: ELECTRICAL SYSTEM. Car\-net® 2.0 may not fully complete the initial Register and Pairing process \(R\&P\) after removal of

JSON: [/v1/bulletins/10190519](/v1/bulletins/10190519)

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