O ring for hall sensor 17,05 x 1.78. Porsche 991.1  ❭  99970740441

OE Match crankshaft pulse sender, reference 94460611500, for selected Porsche 911, 924S, 928, 944 and 968 applications. Catalogued against the relevant Porsche reference, this engine electrical sensor is intended for installation in the specified DME engine-management systems.

What This Product Does

The pulse sender monitors crankshaft rotation and provides the engine control unit with the reference information needed to determine engine speed or position. Depending on the vehicle’s DME configuration, this signal supports the accurate control of ignition timing and fuel injection.

Functions

• Detects crankshaft rotation or a defined reference point
• Transmits an electrical pulse signal to the DME control unit
• Supports calculation of engine speed and crankshaft position
• Provides timing information for ignition and fuel-injection control
• Helps the engine-management system recognise that the engine is cranking

Technical Details

• Part reference: 94460611500
• Component descriptions: pulse sender, crankshaft position sensor, crank-angle sensor and speed reference sensor
• Earlier cross-references: 94460601500 and 94460601700
• The Porsche 944 and 924S engine-electrics catalogues specify two senders for applicable installations
• The Porsche 968 1992–1995 engine-electrics diagram specifies one pulse sender
• Quantity and sensor function vary by engine-management arrangement; confirm the vehicle specification before ordering

Symptoms of Fault

• Engine cranks but does not start
• Intermittent starting difficulty, particularly when the engine is hot
• Sudden stalling or cutting out while running
• Misfires, hesitation or an uneven idle caused by an unstable signal
• Tachometer signal dropping unexpectedly on applicable vehicles
• Stored crankshaft, reference-signal or engine-speed fault information
• Cracked cable insulation, heat damage or corrosion at the connector

Why Replacement Matters

A weak or missing pulse signal can prevent the DME from establishing the correct crankshaft reference. This may interrupt ignition and injection control, resulting in intermittent running faults or a complete no-start condition. Before replacing the sender, inspect its wiring, connector, mounting, sensor gap where applicable, battery condition and engine earth connections. Testing the signal during cranking can help distinguish a defective sender from a wiring or control-unit fault.

Fits

• Porsche 911 & 912 (1965–1989): 911 3.3L Turbo (930) 1978–1989; 911 3.2L 1984–1986; 911 3.2L G50 1987–1989
• Porsche 924 (1977–1988): 924S 2.5L 1986–1987; 924S 2.5L 1988
• Porsche 928 (1978–1995): 928 4.5L 1978–1982; 928S 4.7L 1981–1983; 928S2 4.7L 1984–1986; 928S4 5.0L 1987–1992; 928GT 5.0L 1989–1991; 928GTS 5.4L 1992–1995
• Porsche 944 (1982–1991): 944 2.5L 8V 1982–1987; 944 2.7L 8V 1988–1989; 944S 2.5L 16V 1987–1988; 944S2 3.0L 16V 1989–1991; 944 Turbo 2.5L 8V 1985–1988; 944 Turbo 2.5L 8V 1989–1991; 944 Turbo S 2.5L 8V 1988
• Porsche 968 (1992–1995): 968 3.0L 1992–1994; 968 Sport 3.0L 1994–1995; 968 CS 3.0L 1993–1995; 968 Turbo S 3.0L 1993–1994

Check fitment for your specific vehicle (model, year, engine) before ordering.

FAQs

• Why can a failed reference sender cause a no-start?
  Without a valid crankshaft signal, the DME may be unable to time the ignition and fuel-injection events.
• Why might the fault be intermittent?
  Heat, vibration, ageing insulation or an internal electrical fault can cause the signal to disappear only under certain conditions.
• Should the sensor be replaced from a fault code alone?
  No. Inspect the connector and wiring, verify power and earth conditions, and test the sender signal where suitable diagnostic equipment is available.
• How many senders are required?
  The required quantity depends on the Porsche model and engine-management arrangement. Some 924S and 944 applications use two, while the supplied 968 diagram identifies one.
• Does installation clearance matter?
  Yes. The sensor must be correctly mounted, and the specified gap should be verified where the application uses an adjustable mounting arrangement.