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ZEITRONIX WIDEBAND LAMBDA Replacement SensorAdditional Bosch Wideband Oxygen Sensor LSU 4.2 Genuine Bosch LSU 4.2. Check which O2 sensor is compatible with your Wideband controller. O2 sensor connector plug is usually a good indicator of what you have. LSU 4.2 connector size is about 0.9″ x 0.6″ (32mm x 20mm)
