[Working principle] When outside air enters the throttle, it passes through a sensor that draws a portion of heat from the engine. The amount of heat taken depends on the volume of outside air, requiring additional current to heat the sensor to maintain the necessary temperature. The size of the air intake is regulated through this current. [Replace in Time] Signs of a failing air sensor include vehicle shakiness, weak acceleration, increased fuel consumption, and black smoke from the exhaust. Replacing the sensor can improve fuel efficiency, assist the catalytic converter in effectively eliminating harmful gases from the exhaust system, reduce emissions, and prevent premature damage to the catalytic converter. [NOTE] Please ensure to clean the air box and replace the air filter when installing this Air Sensor Meter, as failure to do so may result in the Code and Check Engine Light remaining on, even after replacing the Air Meter Sensor, which measures the volume and density of air entering the engine and provides accurate readings to the ECU across a wide temperature range. Condition: New Item Type: Air Sensor Manufacturer Part Number: Suitable for a specific brand Other Part Number: Suitable for a specific brand Interchange Part Number: Suitable for a specific brand Fitment Type: Direct Replacement Number of Pin: 5Pins Fit for: For A3 (8PA/8P1) 2.0 TFSi, S3 A4 (8EC/D, B7) 2.0 TFSi A6 (4F2/4F5) 2.0 TFSi (8J3/8J9) 2.0 TFSi For (5P1/5P5) 2.0 TFSi Exeo (3R2/3R5) 2.0 TFSi (1P1) 2.0 TFSi, 2.0 R Toledo III (5P2) 2.0 TFSi For II (1Z3/1Z5) 2.0 For (1F7) 2.0 TFSi Golf V (1K1/1K5) 2.0, 2.0 Golf VI (5K1/517) 2.0, 2.0 R III (1K2) 2.0 TFSi (3C2/3C5) 2.0 FSi (137,138) 2.0 R color: Black Material: plastic Package Contents: 1 x Sensor Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item to differ slightly from the actual product. The measurement allowed error is +/- 1-3cm.