Motorad 1KS1075 Ignition Knock (Detonation) Sensor

Motorad 1KS1075 Knock Sensor for BMW

Motorad 1KS1075 is an ignition knock sensor built for BMW engines that need accurate detonation feedback for proper ECM timing control. It uses a piezoceramic sensing element and a bolt-on design with a wired harness to support reliable signal transfer in demanding engine environments.

Key Features

• Ignition knock (detonation) sensor for engine timing control
• Piezoceramic sensing element for accurate knock detection
• Designed to meet and exceed OEM specifications
• Rectangular female connector with 4 terminals
• Black housing with metal, plastic, and rubber construction
• Wiring harness included; harness length 24.00 in. (609.60 mm)
• Bolt-on mounting style with 0.33 in. (8.38 mm) mounting hole diameter

Detailed Description

This Motorad knock sensor, part number 1KS1075, monitors engine vibration frequencies and sends precise input to the ECM so ignition timing can be adjusted correctly. It is engineered for BMW applications including 1997-2010 BMW 740i, 740iL, 540i, M5, Z8, 745i, 745Li, 545i, 645Ci, 750i, 750Li, 550i, 650i, and X5. This part cross-references BMW 12141435502 and 12141709317 for the same application.

What This Sensor Helps Address

• Check engine light related to knock sensor circuit faults
• Audible engine pinging or detonation under load
• Incorrect ignition timing caused by weak or inaccurate knock feedback
• Rough engine performance from delayed ECM response
• Driveability issues on BMW 540i, X5, and 750i applications

Installation Notes and Tips

Verify connector shape, terminal count, and mounting hole diameter before installation. The sensor uses a bolt-on mounting type and includes a wiring harness, so routing and connector seating should be checked carefully during service. Confirm the vehicle application against the listed BMW fitment before replacing the original sensor.

Quality Assurance

Motorad designs this knock sensor to meet and exceed OEM specifications, using tight-tolerance piezoceramic elements for durability and signal accuracy. Part number 1KS1075 is built for consistent engine knock detection in BMW emission control and sensor applications.