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August 14, 2017 Service bulletin

The Environmental Protection Agency and California Air Resources Board have determined that Volkswagen...

Volkswagen technical service bulletin 23U4 - Circular for 2012-2014 Volkswagen Passat.

Bulletin number
23U4 - Circular
Component
Engine and engine cooling
Summary
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.

Owners of these vehicles have filed 233 complaints in the engine category.

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