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Service bulletin 23U3 - Circular

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10125692
Published by NHTSA2017-12-14
Manufacturer's number23U3 - Circular
Manufacturer's date2017-08-14
NHTSA componentENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

NHTSA's summary

2.0L TDI Engine (GEN 1) Emissions Modification - Customer Only (Retail Sold) USA ONLY - 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.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Exhaust and emissions

Vehicles listed
VOLKSWAGEN BEETLE2013, 2014
VOLKSWAGEN BEETLE CONVERTIBLE2013, 2014 (the catalog's model; the bulletin names a series or trim of it)
VOLKSWAGEN GOLF2010, 2011, 2012, 2013, 2014
VOLKSWAGEN JETTA2009, 2010, 2011, 2012, 2013, 2014
VOLKSWAGEN JETTA SPORTWAGEN2009, 2010, 2011, 2012, 2013, 2014

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
11V4660002011-09-07. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
V0116152014815_202026-10-06. Service bulletin. Suggested fuel additive
V1718062017813_242026-08-05. Service bulletin. Oil Consumption Measurement and Electronic Oil Consumption Measurement
V1719012012855_812026-07-07. Service bulletin. Volkswagen Engine Oil Standards
TT 13-20-01_32026-07-07. Service bulletin. Instruction, how to lubicate engine before initial start.
TT 10-18-02_22026-07-07. Service bulletin. Lubricating engine components before reassembly.
VOS-26-212026-04-06. Service bulletin. This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: A software fix is needed to correct the error message ERP0204E could occur during perform initial operation, software configuration, SVM updates for any control module(s) etc.
V1917012022548_152025-11-10. Service bulletin. G12Evo can now be mixed with previous coolants.
V1718062017813_232025-11-10. Service bulletin. How to measure engine oil consumption.
V1718032037201_202025-11-10. Service bulletin. Proper engine oil level before leaving the factory.
V0116152014815_192025-11-10. Service bulletin. A list of suggested fuel stations