Bosch 0261231004 Ignition Knock (Detonation) Sensor

Bosch Knock Sensor for Passat

This Bosch ignition knock sensor is built for 1993-1997 Volkswagen Passat applications and is identified by part number 0261231004. It is an OE-quality replacement for the engine management system, helping the ECU detect detonation and adjust timing for smoother operation and better fuel use.

Key Features

• Bosch OE-quality ignition knock sensor for engine protection
• Fits 1993-1997 Volkswagen Passat, N/A
• Supports detonation detection for timing correction
• Helps reduce fuel consumption when the engine is operating with proper knock control
• Part number 0261231004 for accurate ordering and lookup
• Cross-reference: 034905377A

Product Details

Bosch ignition knock sensors are engineered to provide the engine control unit with the signal it needs to identify abnormal combustion. On the Volkswagen Passat, that feedback helps the system manage ignition timing and protect the engine under load, during acceleration, or when fuel quality changes. The Bosch 0261231004 is a direct-fit style replacement for the listed Passat model years and is suited for drivers addressing a failed knock sensor, a check engine light, or drivability concerns tied to detonation control.

The Bosch Ignition Knock (Detonation) Sensor (New) line focuses on OE-style sensor performance for modern engine management systems. For buyers searching Bosch 0261231004, Volkswagen Passat knock sensor, or 1993-1997 Passat ignition knock sensor, this part provides a straightforward replacement option with the correct application coverage.

Common Issues This Part May Address

• Knock sensor fault codes
• Check engine light related to detonation sensing
• Engine pinging or spark knock under load
• Reduced timing control from a failed sensor signal
• Poor fuel economy caused by incorrect knock feedback

Installation Notes and Tips

Verify the connector style and sensor location against the original part before installation. Clean the mounting surface, follow the vehicle service procedure for torque and routing, and clear diagnostic trouble codes after replacement. Because this sensor is part of the engine management system, confirm the repair with a scan tool and road test the vehicle after installation.

Quality Assurance

Bosch supplies OE-quality engine management components, and this knock sensor is built to meet the application requirements of the listed Volkswagen Passat models. Part number 0261231004 is the reference to use when matching the correct sensor for 1993-1997 Volkswagen Passat coverage.