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Service bulletins for the 2014 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.

1567 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
TT 15-19-022019-12-06. Service bulletin. ENGINE AND ENGINE COOLING. Information regarding updated cam bracket fastener length.
V801601_20405802019-12-06. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE COOLING:COOLING SYSTEM. Updated to include Noise Dampining Pan Self Locking Bolts in Required Parts table.
Dealer 24EF2019-12-06. Service bulletin. ENGINE; ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Engine and/or transmission control module software designed and certified for similar models/model years was used in vehicles affected by this emissions service action. It is undetermined whether there could be an impact to OBD or CO2 emissions. As a precautionary measure, Volkswagen is proactively updating the software calibrations on affected vehicles.
Circular 24EF2019-12-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Engine and/or transmission control module software designed and certified for similar models/model years was used in vehicles affected by this emissions service action. It is undetermined whether there could be an impact to OBD or CO2 emissions. As a precautionary measure, Volkswagen is proactively updating the software calibrations on affected vehicles.
V171901_20128552019-11-06. Service bulletin. ENGINE; EQUIPMENT. Update to Volkswagen engine oil standards.
V171901_20128552019-10-02. Service bulletin. ENGINE. Update to Volkswagen engine oil standards.
V171901_20128552019-09-10. Service bulletin. ENGINE. Update to Volkswagen engine oil standards. Also includes 2004 and 2005 Jetta Wagon and 2018-2020 Tiguan LWB
V171901_20128552019-08-07. Service bulletin. ENGINE. Engine oil quality standards. Also includes all models for 1997-2003. Also Rabbit from 2006-2009.
V171806-20178132019-06-24. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE. Update to TB to include model year 2018 & 2019 applicability.
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.
24DR-201811202019-06-11. Service bulletin. ENGINE; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. SERV_ACT - Engine Control Module (ECM) Software_REVISED
TT 01 18 142019-06-11. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV); EQUIPMENT ADAPTIVE/MOBILITY. Alternative diagnosis for lean fuel trim.
24DR-201811192019-06-11. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ENGINE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. SERV_ACT - Engine Control Module (ECM) Software_REVISED
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.
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.

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