WenmarOpen by Wenmar Pro

Service bulletins for the 2012 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.

1572 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
V191303 20225492019-04-01. Service bulletin. ENGINE AND ENGINE COOLING. Technical Bulletin (Electric Coolant Fans Continue to Run after Ignition is Switched OFF): This document informs it is considered normal operation for the electric coolant fans to continue to run for up to 15 minutes after the ignition is switched off in gasoline engine applications, and up to 16 minutes in diesel engine applications.
V171303 20178132019-04-01. Service bulletin. ENGINE. Technical Bulletin (Oil Consumption Measurement): Customers have stated oil consumption is higher than the Volkswagen oil consumption standard of up to 0.5 quarts per 600 miles, or 0.5 liters per 1000 km. This document informs how to test the oil consumption rate
TT 26-13-032019-04-01. Service bulletin. FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING. Tech Tips (CBEA, CJAA, CKRA engine codes DPF replacement and/or DTCS P2413, P2463): This document informs of the use of aftermarket air filters such as cotton bed steel mesh or cone style, can cause the MAF sensor to not read accurately, affecting vehicle performance and critical monitoring functions for the diesel particulate filter. This can also result in premature DPF failure. Only use factory air filters. The use of aftermarket air filters is not supported as the system was designed and calibrated to work with factory air filters.
TT 19-13-022019-04-01. Service bulletin. ENGINE AND ENGINE COOLING. Tech Tips (2.0L CCTA/CBFA Coolant Leak or Repeat Coolant Leak from the Water Pump Area): This document informs of the observations that need to be taken to service a water pump replacement
V261305 20315832019-04-01. Service bulletin. ENGINE AND ENGINE COOLING. Technical Bulletin (Exhaust Pressure Control Valve issues): This document informs of the diagnostic issues resulting from malfunctions of the Exhaust Pressure Control Valve. If one or more of the faults are stored in the ECM fault memory, remove the exhaust flap to check for a sticking condition. If the flap cannot be moved or does not move freely, the exhaust flap must be replaced. This document discusses the "Fault Codes" necessary to diagnosis, and potential remedy of the issue. The fault codes for checking warranty coverage for servicing the vehicle are also available.
TT 80-13-012019-04-01. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Tech Tips (Passat-Blower Motor-Fault Diagnosis): If the vehicle comes in with a blower concern, check for DTCs. If DTCs are found, use the table in this document to diagnose the concern.
TT 24-07-1032019-04-01. Service bulletin. ENGINE. Tech Tips (Vehicles with 2.5L Engine - Fault Code P2279 (Leaking Air in Intake System) Diagnostic Tip): When diagnosing fault code P2279-Leaking Air in Intake System, be sure to check the cam timing first. This document informs how to check the cam timing
TT 0117062019-04-01. Service bulletin. ENGINE AND ENGINE COOLING. Informtion to translate O2 sensor values being displayed by the scan tool.
TT 0117052019-04-01. Service bulletin. ELECTRICAL SYSTEM; ENGINE. Coding information for replacement ECM to address specific fault setting after the install.
TT 15 18 012019-03-04. Service bulletin. ENGINE; EQUIPMENT. Balance shaft direction for debris issues.
customer letter2019-03-04. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 23Z3 pre-notification_customer
analysis list 042019-01-07. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ELECTRICAL SYSTEM:IGNITION; STRUCTURE:BODY:DOOR. On-car analysis list of Customer Complaints: Transmission
analysis list 062018-12-10. Service bulletin. ENGINE; ELECTRICAL SYSTEM. On-car analysis list of Customer Complaint: Mil?on with fault code P046C, untouched vehicles
TT 21 18 012018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER; FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS. Incorrect removal of Turbocharger oil feed line may cause engine damage
TT 10 12 012018-12-10. Service bulletin. ENGINE. Engine replacement tip
Final Months of2018-12-10. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. Email_Important TDI Announcement - Final Months of 2.0L Claims Program_VW
2 2-0 Liter Cust2018-12-10. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE. Temporary Pause of Generation 2 2.0 Liter Customer Modifications
Emissions Servic2018-12-10. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. The reductive agent fluid (AdBlue) could contaminate the temperature sensor, causing the Malfunction Indicator Light (MIL) to come on. Additionally, high heat levels can cause the AdBlue fluid to react with the heating fins, causing a variation in internal resistance and the MIL to come on. If the MIL is on, the vehicle will not pass an emissions inspection.
Emissions Servic2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; EQUIPMENT ADAPTIVE/MOBILITY. The reductive agent fluid (AdBlue) could contaminate the temperature sensor, causing the Malfunction Indicator Light (MIL) to come on. Additionally, high heat levels can cause the AdBlue fluid to react with the heating fins, causing a variation in internal resistance and the MIL to come on. If the MIL is on, the vehicle will not pass an emissions inspection.
TT 19 18 012018-12-03. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE. Alternate diagnostic process for overheating.
TT 10 18 012018-12-03. Service bulletin. ENGINE. Diagnostic protocol for engine noise with cam timing faults
SM 12-2017 VWMEX2018-09-17. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. This special notice is to inform dealers to return all part numbers listed in the document. Only superseded part numbers to be ordered going forward.
SM 59-20172018-09-17. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. This special notice is to inform dealers to return all part numbers listed in the document. Only superseded part numbers to be ordered going forward.
On-car analysis2018-09-17. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. On-car analysis list of Customer Complaints: Mil?on with fault code P046C, untouched vehicles
On-car analysis2018-09-17. Service bulletin. ENGINE AND ENGINE COOLING. On-car analysis list of Customer Complaint: Mil?on with fault code P046C, untouched vehicles

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