Bosch 0261210117 Rot.-Speed Sensor

Overview of the Bosch 0261210117 Rot.-Speed Sensor

The Bosch 0261210117 Rot.-Speed Sensor, also known as a crankshaft speed sensor, is an essential component in modern internal combustion engines. It converts the rotational motion of the crankshaft into electrical pulses that are used by the engine control unit (ECU) to determine ignition timing, fuel injection intervals, and overall engine performance.

Key Technical Specifications

• Model Number: 0261210117
• Type: Rotational speed sensor (crankshaft position sensor)
• Signal Output: Pulse train with a frequency proportional to crankshaft speed
• Operating Temperature Range: -40 °C to +125 °C
• Voltage Supply: 12–24 V DC (typical automotive battery voltage)
• Signal Frequency: Up to 20 kHz at maximum engine speed
• Physical Dimensions: Standard mounting flange compatible with most European and American engines
• Material Construction: High‑temperature resistant plastic housing with metal contacts for durability

Primary Functions and Benefits

The sensor’s main role is to provide the ECU with accurate crankshaft position data. This information allows the engine management system to:

• Synchronize ignition timing for optimal combustion efficiency.
• Control fuel injection pulses, ensuring precise air‑fuel mixture.
• Detect engine misfires and trigger diagnostic trouble codes (DTCs).
• Enable start‑stop functionality by monitoring engine speed during idle periods.
• Support advanced traction control systems that rely on engine speed feedback.

Compatibility and Vehicle Applications

The Bosch 0261210117 is designed for a wide range of vehicles, particularly those manufactured by Fiat, Autobianchi, Chery, and other European brands. It is commonly found in models such as:

• Fiat Panda, Lancia Y10, and other compact cars.
• Various Chery sedan and hatchback series.
• Older Fiat Autobianchi models that use a similar crankshaft architecture.
• Some Ford, Volkswagen, and Opel engines with compatible sensor mounting points.

Installation Guide

1. Disconnect the battery: Ensure safety by removing the negative terminal before working on electrical components.
2. Locate the crankshaft pulley: The sensor is typically mounted near the front of the engine block, adjacent to the timing belt or chain.
3. Remove the old sensor: Unscrew the mounting bolts and gently detach the wiring harness. Note the orientation for correct reinstallation.
4. Install the new Bosch sensor: Align the sensor with the mounting flange, secure it with bolts, and reconnect the wiring harness. Tighten bolts to the manufacturer’s torque specification (usually 10–15 Nm).
5. Reconnect the battery: Restore power and verify that the ECU recognizes the new sensor.

Troubleshooting Common Issues

Maintenance Tips

• Regular Inspection: Periodically check the sensor housing for cracks or signs of wear.
• Clean Surrounding Area: Remove oil, coolant, and debris that could interfere with magnetic coupling.
• Avoid Overheating: Ensure adequate airflow around the sensor to prevent thermal stress.

Why Choose Bosch for Your Engine Sensor Needs?

Bosch has a long-standing reputation for precision engineering and reliability in automotive components. The 0261210117 model benefits from:

• High Accuracy: Consistent pulse generation across the entire operating range.
• Durability: Resistant to vibration, temperature extremes, and chemical exposure.
• Standardized Design: Easy integration with existing ECU architectures.
• Global Support: Extensive technical documentation and service resources worldwide.

Conclusion

The Bosch 0261210117 Rot.-Speed Sensor is a critical component that ensures precise engine control by providing reliable crankshaft position data. Its robust construction, wide compatibility, and ease of installation make it an ideal choice for both OEM applications and aftermarket replacements in a variety of vehicles.