Bosch 0261210115 Rot.-Speed Sensor

Bosch 0261210115 Rotational Speed (Crankshaft Pulse) Sensor

The Bosch 0261210115 is a high‑performance crankshaft pulse sensor, also known in various markets as the Rot.-Speed Sensor, Kurbelwellensensor, or Capteur PMH. Designed for modern internal combustion engines, this component delivers precise crankshaft position data to the engine control unit (ECU), enabling accurate ignition timing, fuel injection mapping, and overall engine management.

Key Functionalities

• Crankshaft Position Detection: Generates a clean pulse signal each time the crankshaft completes a rotation or reaches a specific reference point. This information is critical for synchronizing ignition and injection events.
• High Signal Integrity: Built with robust magnetic or Hall‑effect technology, ensuring low noise and high reliability even under harsh engine bay conditions.
• Wide Operating Temperature Range: Capable of functioning from –40 °C to +120 °C, making it suitable for both cold climates and high‑performance engines.
• Compact Design: Small footprint allows easy integration into tight engine bay spaces without compromising airflow or cooling.

Technical Specifications

Compatibility and Applications

The Bosch 0261210115 is engineered to fit a wide range of vehicles, particularly those from the Fiat, Lancia, Innocenti, and Iveco families. Common applications include:

• Fiat Tipo, Tempra, and other compact cars
• Lancia Delta II, Dedra, and related models
• Iveco commercial vehicles with Fiat‑derived powertrains
• Elba 1.4 engines (1994–1996)
• Various European market models where the 0 261 210 115 designation is used

Because of its standardized mounting and connector layout, the sensor can be swapped with OEM units or high‑quality aftermarket equivalents without extensive reprogramming.

Installation Guidelines

1. Preparation: Disconnect the vehicle battery to prevent accidental electrical discharge. Remove any protective covers around the crankshaft area.
2. Removal of Old Sensor: Unscrew the mounting bolts securing the existing sensor. Carefully detach the connector, noting the pin orientation.
3. Positioning the New Sensor: Align the Bosch 0261210115 with the crankshaft pulley or gear tooth reference point. Ensure that the magnetic or Hall element faces the correct side of the rotating component.
4. Mating the Connector: Plug the sensor connector into the ECU harness, matching pin numbers to avoid misconnection.
5. Tightening and Sealing: Secure the mounting bolts to the specified torque (typically 10–15 Nm). Apply a thin layer of anti‑seize compound if recommended by the manufacturer.
6. Testing: Reconnect the battery, start the engine, and verify that the ECU registers crankshaft pulses. Use an OBD‑II scanner to confirm no fault codes related to the sensor are present.

Maintenance Tips

• Inspect the connector for corrosion or loose pins; clean with electrical contact cleaner if necessary.
• Check the mounting surface for debris that could interfere with sensor alignment.
• Periodically verify signal integrity using a diagnostic scan tool capable of reading live sensor data.

Benefits Over Generic Sensors

• Precision: Bosch’s proprietary calibration ensures minimal phase error between the crankshaft position and ECU timing.
• Durability: High‑grade materials resist vibration, heat, and chemical exposure typical of engine compartments.
• Reliability: Proven track record in a wide array of production vehicles guarantees consistent performance over many thousands of miles.

Conclusion

The Bosch 0261210115 Rotational Speed Sensor is an essential component for any engine that relies on accurate crankshaft position data. Its robust construction, precise signal output, and broad compatibility make it a trusted choice for automotive technicians and enthusiasts alike. By installing this sensor, you ensure optimal ignition timing, efficient fuel delivery, and overall engine health.