Hella 013122571 Engine Crankshaft Position Sensor

HELLA Crankshaft Position Sensor for Mazda

The HELLA Engine Crankshaft Position Sensor monitors crankshaft speed and position and sends that data to the engine control system. For Mazda RX-8, RX-7, Protege, and Protege5 applications, this sensor supports accurate engine timing input with a durable inductive design and a 2-pin connection.

Part number 013122571 is built for demanding engine environments, with construction tested against temperature swings, vibration, and exposure to engine fluids. HELLA focuses this sensor line on stable signal output and reduced drift for consistent crankshaft position feedback.

Key Features

• Inductive sensor design for crankshaft speed and position detection
• 2-pole configuration
• Built to resist temperature shock and signal drift
• Tested for vibration, temperature change, and engine fluid exposure
• Direct-fit style for select Mazda applications

Detailed Description

HELLA part number 013122571 is an engine crankshaft position sensor used to provide the engine control module with crankshaft timing data. That information is critical for ignition timing and engine management on Mazda rotary and four-cylinder applications. Compatible vehicle coverage includes Fits 2004-2011 Mazda RX-8, N/A with rotor housing location notes, Fits 1995 Mazda RX-7, N/A, Fits 1993-1994 Mazda RX-7, N/A with 2-pin connector notes, Fits 1999-2003 Mazda Protege, N/A with 2-pin connector notes, and Fits 2002-2003 Mazda Protege5, N/A with 2-pin connector notes.

This HELLA crankshaft position sensor is a practical replacement choice when servicing Mazda RX-8, RX-7, Protege, or Protege5 engine management systems. Part number 013122571 is also referenced by ACI 81052 and Dayco 87744 for the same application.

Common Issues This Part Can Address

• Crankshaft speed or position signal loss
• Hard starting or extended crank time related to timing input faults
• Intermittent engine stalling from unstable sensor output
• Check engine light conditions tied to crankshaft position sensor faults
• Rough running caused by incorrect engine timing data

Installation Notes and Tips

Verify the connector style, pole count, and engine application before installation. This sensor uses a 2-pin configuration and inductive sensing, so matching the original connector and mounting location is important for proper operation. On Mazda RX-8 applications, confirm the rotor housing location noted in the fitment data. Always inspect the harness, connector terminals, and surrounding engine area for damage or contamination before replacing the sensor.

Quality Assurance

HELLA tests this sensor for durability under temperature variation, vibration, and exposure to engine fluids. The design also focuses on reducing signal drift for stable engine control input across the listed Mazda applications.