Compatibility 7 Saloon E38 1994/10 2001/11 5 E39 1995/11 2003/06 For additional models, refer to the product specifications Benefits Accurate knock detection: Monitors engine vibrations to identify abnormal combustion, helping protect the engine from longterm damage Smooth ignition timing: Delivers precise input to the engine control unit based on engine load, helping optimise ignition timing for stable acceleration and smoother driving Prevents costly engine damage: Early detection of detonation reduces misfires and engine wear, supports fuel efficiency, and minimizes the risk of overheating or power loss Key attributes Function: Engine knock and detonation sensing to manage combustion timing Compatibility: Designed for the listed E38 and E39 models; check specifications for exact fit Size and material: Varies by model; exact dimensions and construction are specified in the product details Performance: Realtime monitoring with precise ECU input to support reliable operation and efficiency Use scenarios Daily driving: Maintains stable performance during city and highway conditions where engine load changes Performance or heavyload driving: Helps adjust ignition timing under load or during acceleration to prevent knock Maintenance or replacement: Restore proper sensing and timing after sensor replacement or ECU recalibration to sustain efficiency and power delivery