Bosch 0261231188 Ignition Knock (Detonation) Sensor

Bosch Knock Sensor for Mercedes-Benz

Restore accurate engine knock detection with this Bosch ignition knock (detonation) sensor, part number 0261231188. Built to OE quality standards, it helps the engine control system respond to abnormal combustion and supports smoother operation, better protection, and improved fuel economy.

Compatible with a wide range of Mercedes-Benz models, including Mercedes-Benz S-Class, E-Class, C-Class, SL, CLS, ML, GL, and AMG applications. This Bosch 0261231188 knock sensor is a direct-fit replacement for many late-model and classic Mercedes-Benz engines.

Key Features

• Bosch OE quality ignition knock sensor
• Helps detect detonation and engine knock for precise timing control
• Supports engine protection under load and during acceleration
• Can contribute to reduced fuel consumption, up to 9% per manufacturer data
• Fits numerous Mercedes-Benz gasoline applications from 1993-2025
• Cross-references Genuine 0041539028 for the same application

Product Details

The Bosch BrandLine Ignition Knock (Detonation) Sensor is engineered for vehicles that rely on accurate combustion monitoring to maintain performance and protect internal engine components. When the sensor reports knock events to the ECU, the system can adjust ignition timing to help prevent damage and maintain drivability. This part number 0261231188 is used across many Mercedes-Benz platforms, including Mercedes-Benz Maybach S680, S65 AMG, C300, E350, and SL550 applications.

Long-tail fitment searches for this part often include Mercedes-Benz knock sensor replacement, Bosch 0261231188 ignition knock sensor, and Mercedes-Benz detonation sensor for AMG and Maybach models.

What It Helps Address

• Check engine light related to knock sensor faults
• Audible pinging or detonation under acceleration
• Reduced engine performance from incorrect ignition timing
• Fuel economy loss caused by inaccurate knock feedback
• Driveability issues on Mercedes-Benz engines with failed sensor input

Installation Notes and Tips

Verify engine code and VIN match before ordering, especially on Mercedes-Benz models with overlapping year ranges. Inspect the sensor mounting surface and wiring connector before installation, and clear diagnostic trouble codes after replacement. For best results, confirm the exact application against the vehicle catalog for your Mercedes-Benz C-Class, E-Class, S-Class, or AMG model.

Quality Assurance

Bosch supplies OE-quality engine management components, and this knock sensor is built to meet the demands of modern Mercedes-Benz ignition control systems. Part number 0261231188 is a direct replacement option for many factory applications and is listed with multiple interchange references for identification accuracy.