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
On-car analysis2018-09-17. Service bulletin. 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
On-car analysis2018-09-17. Service bulletin. ENGINE AND ENGINE COOLING. On-car analysis list of Customer Complaints: Mil?on with fault code P046C, untouched vehicles
On-Car Analysis2018-08-06. Service bulletin. ENGINE; EQUIPMENT:ELECTRICAL. On-car analysis list of customer compliants Customer Complaint: Mil?on no electric drive mode, untouched vehicles
On-Car Analysis2018-08-06. Service bulletin. ENGINE; EQUIPMENT:ELECTRICAL. On-car analysis list of customer compliants Customer Complaint: Mil?on no electric drive mode, untouched vehicles
V171701 20128552018-04-16. Service bulletin. ENGINE AND ENGINE COOLING. 17 17 01 July 5, 2017 2012855 Supersedes Technical Bulletin 17-16-02 (V171602) dated April 29, 2016 due to updated oil standards lists to current specifications. Engine Oils Which Meet Volkswagen Oil Quality Standards
V011625 20286092018-03-13. Service bulletin. ELECTRICAL SYSTEM; ENGINE. Update service number and labor operation number.
24CX - Dealer Le2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. The snow flap in the inlet air box housing may remain partially to fully open. Should this occur, excess warm air could enter the air intake through the snow flap inlet.
VWoa Dealer Anno2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. This document informs of Volkswagen AG and Audi AG received notice from the US Environmental Protection Agency, US Department of Justice and the California Air Resources Board of an investigation related to emissions compliance matters.
VIN-4-A-PIN 7-312018-02-05. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE; ELECTRICAL SYSTEM; INTERIOR LIGHTING; STRUCTURE:BODY. On-car analysis list of Customer Complaints: Customer states the oil light is on
23U4 - Circular2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. The Environmental Protection Agency and California Air Resources Board have determined that Volkswagen vehicles equipped with a 2.0L 4-cylinder TDI engine do not comply with applicable emissions regulations. The emissions control systems on the vehicles will not control emissions under off-cycle conditions as effectively as during the federal test procedure. The extent of the emissions increase under off-cycle conditions depends upon how the vehicles are driven.
23U4 - Circular2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. The Environmental Protection Agency and California Air Resources Board have determined that Volkswagen vehicles equipped with a 2.0L 4-cylinder TDI engine do not comply with applicable emissions regulations. The emissions control systems on the vehicles will not control emissions under off-cycle conditions as effectively as during the federal test procedure. The extent of the emissions increase under off-cycle conditions depends upon how the vehicles are driven.
23U4 - Circular2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. The Environmental Protection Agency and California Air Resources Board have determined that Volkswagen vehicles equipped with a 2.0L 4-cylinder TDI engine do not comply with applicable emissions regulations. The emissions control systems on the vehicles will not control emissions under off-cycle conditions as effectively as during the federal test procedure. The extent of the emissions increase under off-cycle conditions depends upon how the vehicles are driven.
23U4 - Circular2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. The Environmental Protection Agency and California Air Resources Board have determined that Volkswagen vehicles equipped with a 2.0L 4-cylinder TDI engine do not comply with applicable emissions regulations. The emissions control systems on the vehicles will not control emissions under off-cycle conditions as effectively as during the federal test procedure. The extent of the emissions increase under off-cycle conditions depends upon how the vehicles are driven.
VWP-13-132018-01-08. Service bulletin. ENGINE. Secondary Air Pressure Sensor Limited Warranty Extension. Volkswagen has extended the Emission Control Systems Warrantly for secondary air pressure sensor replacement under specific conditions to 10 years or 120,000 miles whichever occurs first, from the vehicle's original in-service date, for the following 2.5 L engine vehicles.
V001605 20338462018-01-08. Service bulletin. ENGINE. Updated to include additional model year applicability.
V011615 20148152018-01-08. Service bulletin. ENGINE. Update to include additional model year applicability.
TT 21-13-012017-12-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Tech Tips (Equipped with Turbocharged Engine Turbocharger Replacement Tip): If mechanical damage is found to the turbocharger (e.g. damaged compression wheel, loose or broken shaft), it is not enough to just replace the turbocharger. This document informs the procedure of checks for damage.
V011316 20340462017-12-14. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. Technical Bulletin (Update Programming of ECM for Concerns of a Bump Sensation after Coming to a Stop): Current ECM programming may cause a bump after coming to a stop, which may be felt through the chassis of the vehicle. This concern is caused by the engine torque being slightly high when the transmission goes into Neutral Control. Neutral Control is designed to reduce load on the engine during idle, in order to decrease emissions. The production solution to this issue was improved software for smoother stopping.
V011317 20340122017-12-14. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. Technical Bulletin (Manifold Absolute Pressure Range / Performance Stored in ECM Fault Memory): Monitoring strategy for the manifold absolute pressure sensor is too sensitive, causing fault code P0106 to incorrectly set in the engine control module. The production solution to this issue was improved software. 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.
V271301 20339782017-12-14. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Technical Bulletin (Generator Replacement): This document informs of Charging System inoperative/malfunctions, noise from engine compartment, accessory drive belt damaged or missing. From this condition one or more of the following symptoms are possible * Discharged Battery * No Start * Battery Indicator illuminated in Instrument Cluster * "Low Voltage" DTCs in various control modules * Engine noise * Accessory Drive Belt damaged or missing If a generator is replaced, there must be a confirmed failed GFF Test Plan available, or in the event of a mechanical failure of the component, complete and detailed documentation of the reason for the replacement, which must be submitted into the warranty claim comments.
V281303 20321162017-12-14. Service bulletin. ENGINE AND ENGINE COOLING. Technical Bulletin (Cylinder Glow Plug issues): During the initial glow phase, after switching the ignition "On", the ECM performs a check of the glow plugs through the glow plug control module, to ensure the correct glow plugs are installed. If the engine is cranked during this check, lowering the system voltage, the ECM may receive an incorrect reading and set incorrect glow plug faults. A production solution is already being implemented for this issue. 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.
V171302 20178132017-12-14. Service bulletin. ENGINE AND ENGINE COOLING. Technical Bulletin (Oil Consumption Measurement): Customer states 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. In order to provide effective lubrication and cooling of internal engine components, all internal combustion engines consume a certain amount of engine oil. Oil consumption varies from engine to engine and may change significantly over the life of the engine. Typically, engines with specified break-in periods consume more oil during the break-in period, and the oil consumption will stabilize after the break-in period. This document informs of oil consumption tests to check a vehicles performance.
V201306 20340722017-12-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Technical Bulletin Activated Charcoal Filter System, Solenoid Valve 1 -N80- (Canister Purge Valve) Diagnosis): Completing the GFF function test and performing a vacuum check on the Canister Purge Valve -N80- are essential to diagnose proper operation and to avoid unnecessary replacements. This document informs how to perform the Diagnosis check
23U4 - Circular2017-12-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ENGINE AND ENGINE COOLING. The Environmental Protection Agency and California Air Resources Board have determined that Volkswagen vehicles equipped with a 2.0L 4-cylinder TDI engine do not comply with applicable emissions regulations. The emissions control systems on the vehicles will not control emissions under off-cycle conditions as effectively as during the federal test procedure. The extent of the emissions increase under off-cycle conditions depends upon how the vehicles are driven. Revision Summary Updated loaner/rental instructions.

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