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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
V171805-20128552019-06-24. Service bulletin. ENGINE. Engine oils which meet Volkswagen oil quality standards.
2-0L Gen 2 AEM2019-06-24. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. Email 2.0L Gen 2 AEM Correction
V171805-20128552019-06-12. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE. Engine oils which meet Volkswagen oil quality standards.
V171806-20178132019-06-12. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE. Update to TB to include model year 2018 & 2019 applicability.
26K42019-05-28. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING. 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.
V261902_20284152019-05-06. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. Update to labor operation numbers per Saga updates. Also applies to the 2006-2007 Beetle Convertible.
26K42019-04-22. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; EQUIPMENT. 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.
VSS17042019-04-22. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ELECTRICAL SYSTEM. Notification of the 2.0l Gen 2, TDI remediation fix monitoring via the VTA system, in alignment with campaigns 23U4.
V271902-20339782019-04-22. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Update to model year applicability. Generator Replacement Charging System inoperative/malfunctions, noise from engine compartment, accessory drive belt damaged or missing.
V171901-20128552019-04-22. Service bulletin. ENGINE. Engine Oils Which Meet Volkswagen Oil Quality Standards
TT 15 19 012019-04-22. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE COOLING. Valve spring diagnosis.
Circular 24CX2019-04-15. Service bulletin. ENGINE; EQUIPMENT. 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.
24CX Circular re2019-04-15. Service bulletin. ENGINE. 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.
TT 90 19 012019-04-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING. Instructions to address oil sensor warning.
TT 26 16 012019-04-15. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. AdBlue® mixture specification update when using refractometer
Gasoline Engine2019-04-15. Service bulletin. ENGINE AND ENGINE COOLING. Gasoline Engine Misfire Diagnosis document
23U4 - Circular2019-04-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; 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.
23U4-Circular re2019-04-15. Service bulletin. 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.
VSS-17-112019-04-08. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. Volkswagen of America is requesting your cooperation in supplying us with technical information related to the repair process for vehicles on which the TDI Generation II 2.0L emissions modification is being performed ?Campaign 23U4?. Volkswagen will use this information to ensure prompt analysis and resolution of any emerging concerns.
V241709 20451382019-04-08. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. Update information regarding Top Tier brochure part number andVW literature ordering address
V001713 20338462019-04-08. Service bulletin. ENGINE. Update brochure part number, literature ordering websie address and include an additional model year applicability
TT 2614022019-04-08. Service bulletin. ENGINE. Update procedure to reset oxygen sensor adaptations, as a result of erratic test plan function.
V011232 20313412019-04-08. Service bulletin. ENGINE. Technical Bulletin (DTC P0441 Stored in the Engine Control Module): Production tolerance in Diagnostic Module Tank Leakage (DMTL) pump could cause a false flow reading. The production solution to this issue is updated DMTL pumps as of pumps? production date September 2012. 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 26-12-022019-04-08. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE. Tech Tips (AdBlue Level Reset Procedure): This document informs to reset the AdBlue level indicator after filling, use Guided Fault Finding Function/Component selection to perform the SCR system functions test plan, available under Drivetrain > 01 ? CKRA ? Engine ?J623 > 01-systems capable of self-diagnosis > 01 ? Diesel-direct fuel inj. and glow plug system EDC 17 > 01 ? Engine electronics functions. After starting test plan, make selection to "Set reducing agent fill level to full?.
Reference Guide2019-04-08. Service bulletin. ELECTRICAL SYSTEM; ENGINE. Engine Control Module Updates: This document informs of complaints, and the software updates/Tech Bulletins associated with servicing engine control module issues:

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