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This downstream oxygen sensor is a high-quality replacement for the Volkswagen Passat, engineered to meet OEM specifications for accuracy and durability. Positioned after the catalytic converter, it monitors the exhaust gases to ensure the emission system is functioning correctly and helps the engine control unit maintain the proper air-fuel mixture. Made from durable materials with advanced sensing technology, it provides long-lasting reliability and performance. Easy to install, this sensor is the ideal solution for replacing a worn or faulty oxygen sensor, restoring fuel efficiency, emission compliance, and smooth engine operation in your Volkswagen Passat.