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Impulse / speed reference sensor. Porsche 911 84-89 - 91160621502
91160621502/2
Vehicle Group
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
Information
Impulse / speed reference sensor - also known are Engine Crankshaft Position Sensor
Please note there are 2 per car, Price is Each
Fits:
Porsche 911 1984-1986 3.2L
Porsche 911 1987-1989 3.2L G50
Porsche 911 1978-1989 3.3L Turbo (930)
The engine crankshaft position sensor (CPS) is a critical component that monitors the crankshaft’s position and rotational speed. It sends this data to the engine control unit (ECU), allowing precise control of fuel injection, ignition timing, and other key engine functions. Without accurate input from the CPS, the ECU cannot properly synchronize spark or fuel delivery—leading to poor performance or even a no-start condition.
Crankshaft sensors typically use magnetic or Hall-effect technology:
Magnetic sensors generate a signal with a coil and magnet as the crankshaft rotates. Hall-effect sensors detect changes in the magnetic field using a semiconductor for highly accurate readings.
Depending on the engine design, the CPS is usually located near the crankshaft pulley, harmonic balancer, flywheel, or transmission. It reads notches or teeth on a tone wheel to create a signal the ECU can interpret.
Over time, heat, vibration, and contaminants (oil, dirt, or metal shavings) can cause the sensor to fail. When this happens, common symptoms include engine stalling, rough idling, misfires, or a no-start condition.
Common Symptoms of a Failing Crankshaft Position Sensor
No Start Condition – If the ECU doesn’t receive a proper signal, the engine won’t start.
Stalling When Warm – The sensor may fail when the engine reaches operating temperature, causing unexpected stalling.
Erratic or Dead Tachometer – In some vehicles, a faulty CPS can cause the tachometer to behave irregularly.
Check Engine Code P0335 – A failed internal circuit may trigger this code, though not always.
Poor Performance at Certain RPMs – Timing issues can cause hesitation, especially at idle or higher RPMs.
Multiple Cylinder Misfires – Unlike a single bad coil or injector, CPS failure can cause misfires across all cylinders.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160621502
The product you are viewing cross references to these numbers
Please note there are 2 per car, Price is Each
Fits:
Porsche 911 1984-1986 3.2L
Porsche 911 1987-1989 3.2L G50
Porsche 911 1978-1989 3.3L Turbo (930)
The engine crankshaft position sensor (CPS) is a critical component that monitors the crankshaft’s position and rotational speed. It sends this data to the engine control unit (ECU), allowing precise control of fuel injection, ignition timing, and other key engine functions. Without accurate input from the CPS, the ECU cannot properly synchronize spark or fuel delivery—leading to poor performance or even a no-start condition.
Crankshaft sensors typically use magnetic or Hall-effect technology:
Magnetic sensors generate a signal with a coil and magnet as the crankshaft rotates. Hall-effect sensors detect changes in the magnetic field using a semiconductor for highly accurate readings.
Depending on the engine design, the CPS is usually located near the crankshaft pulley, harmonic balancer, flywheel, or transmission. It reads notches or teeth on a tone wheel to create a signal the ECU can interpret.
Over time, heat, vibration, and contaminants (oil, dirt, or metal shavings) can cause the sensor to fail. When this happens, common symptoms include engine stalling, rough idling, misfires, or a no-start condition.
Common Symptoms of a Failing Crankshaft Position Sensor
No Start Condition – If the ECU doesn’t receive a proper signal, the engine won’t start.
Stalling When Warm – The sensor may fail when the engine reaches operating temperature, causing unexpected stalling.
Erratic or Dead Tachometer – In some vehicles, a faulty CPS can cause the tachometer to behave irregularly.
Check Engine Code P0335 – A failed internal circuit may trigger this code, though not always.
Poor Performance at Certain RPMs – Timing issues can cause hesitation, especially at idle or higher RPMs.
Multiple Cylinder Misfires – Unlike a single bad coil or injector, CPS failure can cause misfires across all cylinders.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91160621502
91160621501
0261210005
91160621500
91160621502
91160621503
The product you are viewing cross references to these numbers
Price: £65.00
In stock
Related products
Vehicle Group
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Information
Impulse / speed reference sensor.
Fits:
Porsche 964 1989-94 (requires ADAPTORKIT01)
Porsche 993 1995-98 (requires ADAPTORKIT01)
Porsche 996 Turbo 2001-05 (6-speed Manual transmission)
Please note: this part has been changed by Porsche and you may require adaptor kit for plug connector.
Replacement crankshaft position sensor also known as an impulse or pulse sender. The crankshaft position sensor continuously monitors the rotational speed and position of the crankshaft as it spins. This information is transmitted as a signal to the engine control unit (ECU), which uses it to control key functions like ignition timing, fuel injection timing, and engine speed cues. Without a properly functioning sensor, the ECU may not be able to accurately time spark and fuel delivery, which can cause poor performance, rough idling, misfires, or failure to start.
The crankshaft position sensor is vital to engine management accuracy. If it fails or generates inconsistent signals, the ECU may not be able to properly time spark and fuel delivery, leading to:
• Poor engine performance
• Stalling, rough idle, or hesitation
• Hard starting or no-start conditions
• Fault codes related to timing or crank sensor errors
Replacing a worn or failed sensor restores accurate rotational feedback to the ECU, helping maintain engine drivability and reliability.
Replace the crankshaft position sensor if you notice:
• Engine misfires or rough idle
• Stalling or limp performance
• Engine won’t start but cranks
• Diagnostic codes related to crank position
• Inconsistent tachometer readings
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660610500
The product you are viewing cross references to these numbers
Fits:
Porsche 964 1989-94 (requires ADAPTORKIT01)
Porsche 993 1995-98 (requires ADAPTORKIT01)
Porsche 996 Turbo 2001-05 (6-speed Manual transmission)
Please note: this part has been changed by Porsche and you may require adaptor kit for plug connector.
Replacement crankshaft position sensor also known as an impulse or pulse sender. The crankshaft position sensor continuously monitors the rotational speed and position of the crankshaft as it spins. This information is transmitted as a signal to the engine control unit (ECU), which uses it to control key functions like ignition timing, fuel injection timing, and engine speed cues. Without a properly functioning sensor, the ECU may not be able to accurately time spark and fuel delivery, which can cause poor performance, rough idling, misfires, or failure to start.
The crankshaft position sensor is vital to engine management accuracy. If it fails or generates inconsistent signals, the ECU may not be able to properly time spark and fuel delivery, leading to:
• Poor engine performance
• Stalling, rough idle, or hesitation
• Hard starting or no-start conditions
• Fault codes related to timing or crank sensor errors
Replacing a worn or failed sensor restores accurate rotational feedback to the ECU, helping maintain engine drivability and reliability.
Replace the crankshaft position sensor if you notice:
• Engine misfires or rough idle
• Stalling or limp performance
• Engine won’t start but cranks
• Diagnostic codes related to crank position
• Inconsistent tachometer readings
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660610500
91160621703
99360621701
99360621701
0261210136
0261210205
The product you are viewing cross references to these numbers
Price: £41.25
In stock
Vehicle Group
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Information
Impulse / speed reference sensor.
Fits:
Porsche 964 - 1989 to 1994
Porsche 993 - 1995 to 1998
Porsche 996 Turbo - 2001 to 2005 (6-speed Manual transmission)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660610500
The product you are viewing cross references to these numbers
Fits:
Porsche 964 - 1989 to 1994
Porsche 993 - 1995 to 1998
Porsche 996 Turbo - 2001 to 2005 (6-speed Manual transmission)
Speed sensors, also referred to as pulse generators, are often the source of various errors. These sensors provide critical speed data required for the engine electronics to function properly, enabling regulation through feedback control. Depending on the vehicle's control system, pulse generators can serve as either camshaft or crankshaft sensors. Our spare parts program includes a wide range of pulse generators to meet your needs.
Starting with the 1996 model year, knock sensors, speed sensors, and temperature sensors were upgraded with improved plug connections. Using this conversion kit, you can easily update your vehicle’s wiring harness to the latest connector standard.
Please note: this part has been changed by Porsche and you will require the adaptor kit for plug connector if you are changing the original item.Diagram ref no 13
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99660610500
91160621703
99360621701
99360621701
The product you are viewing cross references to these numbers
About kit
This kit is comprised of the following items:
1 x Impulse / speed reference sensor. Porsche 964 / 993 / 996T (99660610500/3)
Unit Price: £41.25
InStock
1 x Electrical Plug Housing - Multiple Applications. Porsche 964/993/996 Carrera & Turbo & GT3 / 986 Boxster (99965291640)
Unit Price: £9.65
InStock
3 x Gasket (99970416140)
Unit Price: £0.95
InStock
3 x Electrical connector pin. Porsche 993 (99965287122)
Unit Price: £2.51
StockDue
Price: £61.28
Arriving soon