Bosch 0261231045 Ignition Knock (Detonation) Sensor

Bosch Knock Sensor for Volkswagen

Bosch 0261231045 is an OE-quality ignition knock sensor for engine knock detection and protection. It supports accurate timing control to help reduce fuel consumption and maintain smooth operation in Volkswagen Beetle, Golf, and Jetta applications.

Key Features

• Bosch OE quality knock sensor for detonation monitoring
• Helps protect the engine by detecting abnormal combustion
• Supports fuel consumption reduction through proper engine control
• Direct-fit replacement for select Volkswagen models
• Cross-references Volkswagen 030905377A for the same application

Detailed Description

This Bosch ignition knock sensor, part number 0261231045, is built for 1999-2001 Volkswagen Beetle, 1999-2001 Volkswagen Golf, and 1999-2001 Volkswagen Jetta. It is used by the engine management system to detect knock or detonation so ignition timing can be adjusted for protection and efficiency. Bosch describes this OE-quality knock sensor as helping optimize engine protection and supporting lower fuel consumption when the system is operating correctly.

The Bosch ignition knock sensor line focuses on accurate signal input for modern engine control systems. For Volkswagen Beetle, Golf, and Jetta owners searching for a Bosch knock sensor 0261231045 or an OE replacement knock sensor for 1999-2001 Volkswagen models, this part matches the listed applications and interchange reference.

What It Helps Solve

• Engine pinging or spark knock under load
• Check engine light related to knock sensor faults
• Reduced engine performance from incorrect timing control
• Fuel economy loss caused by poor knock detection
• Rough operation linked to detonation-related engine management issues

Installation Notes and Tips

Verify the part number and vehicle application before installation. Inspect the mounting surface and wiring connector for damage, corrosion, or contamination before fitting the new sensor. After installation, clear any stored fault codes and confirm proper engine operation with a scan tool if needed.

Quality Assurance

Bosch OE-quality construction supports reliable knock detection for engine protection and consistent control-system input. This part is intended for direct replacement in the listed Volkswagen applications.