Volkswagen Jetta (A4) with BBW engine - Oxygen Sensor Indentification (B1S3)

Abstract: Volkswagen Jetta (A4) with BBW engine, Oxygen Sensor Identification (B1S3).
Revised exploded view for oxygen sensors on Volkswagen BBW engine for Volkswagen

This engine uses three oxygen sensors. Bank 1, Sensor 1 (B1S1),  Bank 1, Sensor 2 (B1S2), and Bank 1, Sensor 3 (B1S3) are arranged from the exhaust manifold to the end of the catalytic converter in numerical order. In other words, Bank 1, Sensor 3 is the last sensor, post cat. 

Reference Bentley Service Manual

Volkswagen Jetta, Golf, GTI (A4)Service Manual: 1999, 2000, 2001,2002, 2003, 2004, 2005

page 26-15.

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Applies to: Volkswagen Jetta (A4) with engine code BBW (2.0L, 2004-2005 production)

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