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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.

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
23U4 - Circular2017-12-14. Service bulletin. ENGINE AND ENGINE COOLING; 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. Revision Summary Updated LOANER claiming instructions.
VSS 17-082017-12-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. VSS 17-08 - TDI Monitoring Program - Campaigns 23Q3/23U4/23U3 2.0L Emissions Modification - Gen I, Gen II and Gen III.
V261301 20315832017-12-14. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Technical Bulletin (Exhaust Pressure Control issues): This document informs that water and road salt can corrode the exhaust flap shaft causing it to stick in open / closed position. The production solution to this issue was Improved parts introduced into production. 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.
23U4 - Dealer le2017-12-14. Service bulletin. ENGINE. 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.
TT 20-09-062017-12-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; FUEL SYSTEM, DIESEL. Tech Tips (TDI Engine - N75 Solenoid Valve Diagnosis): This document informs with graphical aid the testing of the N75 Solenoid Valve in the event of a turbocharger fault code such as P0299 or P0234. This applies to Mechanical Injection Style Diesel Engines, Pumpe Duse Style Diesel Engines and the new Common Rail Style Diesel Engines.
V871407 20372802017-12-05. Service bulletin. ENGINE AND ENGINE COOLING. Technical Bulletin (Water /Snow in Blower Housing): Water /Snow may enter the fresh air port of the blower housing contaminating the blower. The blower motor bearings may fail and create a high pitched noise. Excess water/snow enters the water box through the drain port located in the wheel housing. Revised parts. The product solution for this issue was -New passenger side wheel liner in production CW20/2014. -New blower air intake cover and water deflector in production CW28/2014. 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.
V011406 20340122017-12-05. Service bulletin. ENGINE. Technical Bulletin (Manifold Absolute Pressure Range / Performance Stored in ECM Fault Memory): Monitoring strategy for the manifold absolute pressure sensor is too sensitive, causing P0106 to incorrectly set in the engine control module. The product solution for this issue was improved software.
V011408 20148152017-12-05. Service bulletin. ENGINE. Technical Bulletin The use of contaminated gasoline, seasonal fuel changes (summer/winter fuel) or gasoline with a low content of deposit control additives may result in one or more of the following conditions: -Excessive accumulation of deposits on intake valves, intake manifold, fuel injectors and combustion chambers. -Engine runs rough after cold start. -Excessive engine cranking time. -Stumbles while driving. -Rough engine idle. -Loss of engine performance. -Poor fuel economy. This document informs of the procedure for the vehicle if it is diagnoised with poor quality gas
V151402 20321502017-12-05. Service bulletin. ENGINE. Technical Bulletin (Proper Removal of Engine Cover to Avoid Breakage): Pulling on the engine cover in some areas can cause damage. This document informs on the procedure to remove the engine cover.
V211402 20361102017-12-05. Service bulletin. ELECTRICAL SYSTEM; ENGINE. Technical Bulletin (Engine Lacks Performance, Shaft of Turbine Fan of Turbo Charger Broken or Seized): In the case of a damaged turbocharger it is important to follow the steps contained in this document to avoid repeat repairs. 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.
V231402 20366562017-12-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. Technical Bulletin (No Start, or Rough Running issues): When diagnosing a MIL ON, no-start or rough running concern on a common rail diesel vehicle, and no root cause is found after following all GFF diagnostic procedures, it may be necessary to check for metallic particles in the High Pressure Fuel Pump. If such an inspection is necessary, the guidelines in this document must be observed when removing the N290 Fuel Metering Valve
V231403 20366562017-12-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. Technical Bulletin (No Start, or Rough Running due to Fuel Rail issues): When diagnosing the condition above on a common rail diesel vehicle, if no root cause is found after checking all other components and all GFF diagnostic procedures have been performed, it may be necessary to check for metallic particles in the High Pressure Fuel Pump using the service section of this document. If such an inspection is necessary, the following guidelines must be observed when removing the N290 Fuel Metering Valve.
V211507 20361102017-11-08. Service bulletin. ENGINE. Technical Bulletin (Engine Lacks Performance, Shaft of Turbine Fan of Turbo Charger Broken or Seized): This document contains the method to diagnose, and to service this issue.
V201503 20314262017-11-08. Service bulletin. ELECTRICAL SYSTEM; ENGINE; FUEL SYSTEM, GASOLINE. Technical Bulletin: High Pressure Fuel Pump Diagnosis. Completing the GFF high pressure pump function test is essential to diagnose proper pump operation and to avoid unnecessary replacements. This document contains the procedure to update the programming on the diagnostic hardware. This document contains the fault codes necessary to check the warranty coverage for servicing this issue.
V241505 20381612017-11-08. Service bulletin. ENGINE AND ENGINE COOLING. Technical Bulletin (Intake manifold runner position sensor issues): This document informs what repairs are needed to fix the issue. This document contains the fault codes necessary to check the warranty coverage for servicing this issue.
V261507 20315832017-11-08. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; EQUIPMENT. Technical Bulletin (Exhaust Pressure Control Valve / Exhaust Gas Recirculation Flow issues): This document contains the fault codes needed to diagnose, and service the issue. The document contains the fault codes necessary to check warranty coverage for servicing the issue
V871506 20199472017-11-08. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; ENGINE AND ENGINE COOLING. Technical Bulletin (Air Conditioning, Cleaning of the Refrigerant Circuit (U.S.Only)): In cases where an air conditioning system component (such as a compressor or other system component) has failed and debris from the compressor or component is circulated throughout the refrigerant circuit, the refrigerant circuit must be cleaned of any and all debris or damage to the replacement components will result. This document contains information on how to diagnose, and service this issue.
V871508 20055662017-11-08. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Technical Bulletin (HVAC, Unpleasant Odor): Unpleasant odor is coming from Heating and Ventilation system. Odor mainly occurs after vehicle has been sitting (unused) at least 5 hours and within 20 to 60 seconds after vehicle is first started. This document contains information on how to diagnose, and service this issue.
V211505 20361102017-11-08. Service bulletin. ENGINE; POWER TRAIN. Technical Bulletin: Engine Lacks Performance, Shaft of Turbine Fan of Turbo Charger Broken or Seized. In the case of a damaged turbocharger it is important to follow the steps contained in this document to avoid repeat repairs.
TT 21-15-012017-11-08. Service bulletin. ENGINE AND ENGINE COOLING. Tech Tips (Air Coolant Pump Control Circuit/Open): The document discusses diagnosing for the fault code DTC P023A (Charge Air Coolant Pump Control Circuit/Open)
TT 23-15-012017-11-08. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; FUEL SYSTEM, GASOLINE. Tech Tips (Exhaust Gas Recirculation System Performance issues): After replacing the mass air flow sensor basic setting must be reset. This document informs of the procedure necessary to perform the reset
TT 21-10-022017-11-08. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER; POWER TRAIN. Tech Tips: The document discusses the conditions of when turbo can to be fixed or replaced
TT 19-13-022017-11-08. Service bulletin. ENGINE AND ENGINE COOLING. Tech Tips (Coolant Leak or Repeat Coolant Leak from the Water Pump Area): The document informs to inspect for issues, and why issues may happen. It also notes how to fix the issue, and other issues that could happen while repairing the issue
TT 19-12-012017-11-08. Service bulletin. ENGINE. Tech Tips (Radiator Identification Sensor): On TSI (2.0l CCTA, CBFA) equipped vehicles with fault code P2568 Direct Ozone Reduction Catalyst Temperature Sensor, this fault refers to - G611- as Radiator Identification Sensor. If the radiator requires replacement on any above listed vehicle, the -G611- will be packaged separately within the radiator packaging. The new sensor will need to be bonded to the radiator.
V201502 20314262017-11-08. Service bulletin. FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM; ENGINE. Technical Bulletin (High Pressure Fuel Pump Diagnosis): Completing the GFF high pressure pump function test is essential to diagnose proper pump operation and to avoid unnecessary replacements

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