Bosch 0261231200 Ignition Knock (Detonation) Sensor

Bosch Knock Sensor for BMW V8 Engines

Bosch 0261231200 is an OE-quality ignition knock sensor built for BMW engines that need accurate detonation monitoring and stable engine protection. It supports smoother combustion control and can help reduce fuel consumption by up to 9% when the engine management system is receiving correct knock feedback.

Key Features

• Bosch OE-quality ignition knock (detonation) sensor
• Helps the engine control system detect spark knock and adjust timing
• Supports engine protection under load, heat, and varying fuel conditions
• Built for BMW applications across multiple 4.4L and 4.8L V8 platforms
• Part number 0261231200 for direct catalog identification
• Cross-reference: URO 13627568421

Detailed Description

This Bosch knock sensor is designed for BMW 540i, 545i, 550i, 645Ci, 650i, 745i, 745Li, 750i, 750Li, X5, M5, Z8, 740i, and 740iL applications listed in the fitment data. As an ignition knock sensor, it sends the engine management system the signal needed to recognize detonation and respond with the proper timing correction. Bosch positions this part as an OE-quality replacement for drivers who want accurate sensor input and consistent engine control.

For BMW 550i and BMW X5 knock sensor replacement searches, Bosch 0261231200 is a direct catalog match for the listed vehicles and model years. It is also a relevant choice for BMW 745i and BMW 750Li knock sensor service where precise detonation detection is important for drivability and engine protection.

What It Helps Address

• Knock or pinging under acceleration
• Check engine light related to knock sensor faults
• Reduced engine performance from incorrect timing correction
• Unstable combustion control caused by a failing detonation sensor
• Fuel economy loss from inaccurate knock feedback

Installation Notes and Tips

Verify the engine code and connector style against the existing sensor before installation. Inspect the mounting surface and wiring harness for damage, corrosion, or oil contamination, since those issues can affect signal quality. After replacement, clear diagnostic trouble codes and confirm that the engine control system is reading knock data correctly.

Quality Assurance

Bosch OE-quality construction supports reliable sensor output and consistent engine management performance. This part is identified by Bosch 0261231200 and is cataloged for the BMW applications shown above.