HELLA 6PG 013 114-391 knock sensor, 12 V, 3-pin, plug housing shape:

Product description

• fits e.g. AUDI A4 B5 (8D2) 1.8 T quattro (please check exact vehicle application)
• Length: 743mm - Tightening Torque: 20Nm
• Corresponds to the original part in colour: Black
• HELLA knock sensors use a piezo element to detect combustion in each cylinder and send data to the ECU, which adjusts ignition timing to prevent engine knock.
• Contributes to higher engine power and optimized fuel combustion, reducing unwanted engine noise and wear.
• Faulty sensors may cause a check engine light, error codes, power loss, or increased fuel use.
• Built to last-HELLA sensors are resistant to vibration, dirt, and moisture, ensuring durability and reliability over time.