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Service bulletins for the 2021 Volkswagen Passat

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.

349 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
VOS-26-422026-08-05. 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-26-152026-04-06. 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-26-012026-02-06. 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_132026-01-07. Service bulletin. ELECTRICAL SYSTEM. Diagnosis for Excessive Current Draw.
V9124052074273_62025-12-05. 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_52025-09-04. Service bulletin. ELECTRICAL SYSTEM. Activation
V9419012011521_202025-01-07. Service bulletin. ELECTRICAL SYSTEM. Internal Moisture Accumulation
V9124052074273_32024-11-06. Service bulletin. ELECTRICAL SYSTEM. Green Light Does Not Illuminate
V2719012011894262024-09-06. Service bulletin. ELECTRICAL SYSTEM. Battery testing
V9124052074273_22024-09-06. Service bulletin. ELECTRICAL SYSTEM. Car-net® 2.0 may not fully complete the initial Register and Pairing process (R&P) after removal of
V9124052074273_12024-08-06. Service bulletin. ELECTRICAL SYSTEM. Car-net® 2.0 may not fully complete the initial Register and Pairing process (R&P) after removal of
TT 91 24 012024-02-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Addressing Cybersecurity or Vehicle Hack concerns
V2719012011894242023-08-04. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Battery Testing and Charging using Midtronics VAS6161 and or GRX3000 Vas Charger
V2715032016076122023-08-04. Service bulletin. ELECTRICAL SYSTEM. Diagnostic assistance for excessive static current draw
VOS-23-212023-07-10. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This communication is a notice for software changes with the ODIS program for specific cars.
V2719012011894_22023-07-10. Service bulletin. ELECTRICAL SYSTEM. Battery Testing and Charging using Midtronics VAS6161 and or GRX3000 Vas Charger
VCarNetCE2023-07-10. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Notifying customers they can take advantage of complimentary safe and secure after their complimentary software update
V0118122014603192023-07-10. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Software Version Management (SVM) instruction.
TT 27 20 02_32023-06-06. Service bulletin. EQUIPMENT:OTHER:LABELS; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Battery adaptation procedure when battery label is missing.
V2719022033978102023-04-06. Service bulletin. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR. Generator Replacement
V2719012011894222023-01-06. Service bulletin. ELECTRICAL SYSTEM. Battery testing and charging using special tools VAS6161 & GRX3000VAS Charger. Updated to include additional model year applicability.
V9422022066761_22023-01-06. Service bulletin. ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SENSORS. Park Assist Sensors Providing False Warnings. Updated to include additional model year applicability.
561065760A2023-01-03. Service bulletin. ELECTRICAL SYSTEM:STARTER ASSEMBLY. Installation of original remote start feature accessory
V0019042054866_62022-12-06. Service bulletin. ELECTRICAL SYSTEM. Instruction for set-up of SD creator to obtain Software updates. Bulletin updated to include additional certificate information.
TT 91 20 09_62022-11-04. Service bulletin. ELECTRICAL SYSTEM. Update to the transport mode removal test plan under the Service title.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.