Facet 9.3120 Ignition Knock (Detonation) Sensor

Reliable Ignition Knock Sensor for BMW 318i, 318is, 318ti, and Z3

The Facet 9.3120 ignition knock sensor is designed specifically for select BMW models, including the 318i, 318is, 318ti, and Z3. This sensor plays a critical role in detecting engine knock and ensuring optimal ignition timing for efficient engine performance.

• Compatible with BMW 318i, 318is, 318ti, and Z3 models
• Part number 9.3120 for precise identification
• Monitors engine detonation to prevent damage
• Essential component in emission control sensor systems
• Durable construction for consistent performance

Product Overview and Functionality

The Facet 9.3120 ignition knock sensor is an integral part of the emission control system, designed to detect engine knock or detonation. By sensing vibrations caused by abnormal combustion, it sends signals to the engine control unit (ECU) to adjust ignition timing accordingly. This helps maintain engine efficiency, reduce emissions, and protect internal engine components from damage caused by knocking. The sensor is engineered to meet the specifications required by BMW for the 318i, 318is, 318ti, and Z3 models, ensuring proper fitment and reliable operation.

Common Issues Addressed by the Facet 9.3120 Knock Sensor

• Engine knocking or pinging noises during acceleration
• Reduced fuel efficiency due to improper ignition timing
• Check engine light triggered by knock sensor fault codes
• Increased emissions from inefficient combustion
• Potential engine damage from prolonged detonation

Installation Notes and Tips

When installing the Facet 9.3120 ignition knock sensor on BMW 318i, 318is, 318ti, or Z3 models, ensure the engine is cool and the battery is disconnected to prevent electrical issues. Proper torque specifications should be followed to avoid sensor damage or improper operation. It is recommended to inspect the wiring harness and connectors for corrosion or damage before installation. Calibration or ECU reset may be necessary after replacement to clear fault codes and optimize sensor performance.

Quality Assurance and Warranty Information

Facet manufactures the 9.3120 ignition knock sensor to meet OEM standards for durability and accuracy. While specific warranty details may vary, Facet products typically come with a limited warranty covering defects in materials and workmanship. This ensures that the sensor maintains reliable performance throughout its service life when installed correctly on compatible BMW models.