knock sensor Genuine Porsche part 95890537700

Crankshaft Position Sensor.



Fits:
Porsche Cayenne 958 4.8L S / GTS / Turbo 2011-17 
Porsche Panamera 970 3.6L V6 & 4.8 S / GTS / Turbo 2010-17 

Click 'Zoom in' for large parts diagram.
Diagram ref no 13

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A7905381

The product you are viewing cross references to these numbers

Gearbox speed sensor.



Fits:
Porsche 981 / 982 (718) Boxster / S 2012>> (Manual Models Only) 

Porsche 981 / 982 (718) Cayman / S 2013>> (Manual Models Only) 
Porsche 981 Boxster Spyder 3.8L 2016 
Porsche 981 Cayman GT4 3.8L 2016 
Porsche 982 (718) Spyder / Cayman GT4 4.0L 2019>> (Only For Gearbox Code G8225) 

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A7905381

The product you are viewing cross references to these numbers

Gearbox speed sensor.



Fits:
Porsche 981 / 982 (718) Boxster / S 2012>> (Manual Models Only) 

Porsche 981 / 982 (718) Cayman / S 2013>> (Manual Models Only) 
Porsche 981 Boxster Spyder 3.8L 2016 
Porsche 981 Cayman GT4 3.8L 2016 
Porsche 982 (718) Spyder / Cayman GT4 4.0L 2019>> (Only For Gearbox Code G8225) 

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A7905381

The product you are viewing cross references to these numbers

Crankshaft Position Sensor.



Fits:
Porsche 958 4.8L Cayenne S / GTS / Turbo 2011-17
Porsche 970 3.6L / 4.8L Panamera S / GTS / Turbo 2010-17

Click 'Zoom in' for large parts diagram.
Diagram ref no 13

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A7905381

The product you are viewing cross references to these numbers

Gearbox speed sensor.
The gearbox speed sensor detects the rotational speed of the gearbox output shaft and provides the necessary data to the engine control module, gearbox electronics and dashboard gauges.

Fits:
Porsche 981 / 982 (718) Boxster / S 2012>> (Manual Models Only)
Porsche 981 / 982 (718) Cayman / S 2013>> (Manual Models Only) 
Porsche 981 Boxster Spyder 3.8L 2016 
Porsche 981 Cayman GT4 3.8L 2016 
Porsche 982 (718) Spyder / Cayman GT4 4.0L 2019>> (Only For Gearbox Code G8225) 

Diagram ref no 11

This sensor monitors how fast the gearbox is turning and sends that data to the vehicle’s control systems. It helps the transmission and engine computer decide shift points, rev matches, speedometer readings, and in some cases limits or safety functions. Without an accurate signal, many systems can’t function correctly.

A faulty speed sensor can lead to incorrect or delayed speed readings, inconsistent shifting behaviour, or misreported speed on the dashboard. Over time, wear, contamination, or mechanical damage can degrade sensor performance. Replacing it restores precise transmission control, safer driving, and prevents further damage to related components like the gearbox ECU, shift linkage, or drive train.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A7905381

The product you are viewing cross references to these numbers

Crankshaft Position Sensor.
This sensor precisely monitors crankshaft rotation and relays vital timing data to the ECU. Built to withstand extreme heat and vibration, it ensures smooth engine operation, accurate ignition timing, and reliable power delivery.

Fits:
Porsche 958 4.8L Cayenne S / GTS / Turbo 2011 - 2017
Porsche 970 3.6L / 4.8L Panamera S / GTS / Turbo 2010 - 2016

Diagram ref no 13

This sensor tracks crankshaft rotation to identify piston position and engine speed, sending precise timing signals to the ignition and fuel systems. By doing so, it ensures smooth starts, efficient combustion, and consistent power delivery. It also supports key safety functions, including misfire detection and limp-mode protection.

A faulty crankshaft sensor can lead to hard starts, stalling, loss of power, or even engine shutdown. It may also trigger check-engine lights, misfires, and disrupt critical fuel and ignition timing. Replacing it ensures reliable performance, and helps prevent costly engine damage.

Common signs of a failing crankshaft sensor include hard starting or long cranking times, unexpected stalling, and rough idling or power loss while driving. You may also notice the check engine light triggered with related fault codes, misfires, or a drop in fuel efficiency.  

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A7905381

The product you are viewing cross references to these numbers

Knock Sensor.
Restore accurate combustion monitoring and dependable engine management with this Porsche Knock Sensor, part number 95890537700. Designed for compatible Porsche applications, the knock sensor is an important part of the engine management system, detecting abnormal combustion vibrations and allowing the ECU to adjust ignition timing when necessary.  

Fits:

Diagram Ref No 21

During normal operation, the engine management system aims to achieve efficient combustion while protecting the engine from detonation, also known as engine knock or pinging. A knock sensor monitors characteristic vibrations within the engine and sends this information to the ECU. If knock is detected, the ECU can modify ignition timing and other applicable parameters to reduce potentially damaging combustion.

A faulty sensor can provide inaccurate information or no signal at all. The ECU may respond by using a more conservative engine strategy, potentially resulting in reduced performance, increased fuel consumption or an illuminated engine-management warning light.

The Porsche Knock Sensor 95890537700 provides the correct replacement solution for a failed or damaged sensor, helping restore accurate knock detection and proper engine-management operation.

What This Product Does:

• Detects vibrations associated with abnormal combustion or detonation.
• Sends knock information to the engine control unit.
• Allows the ECU to adjust ignition timing when knock is detected.
• Helps protect the engine from potentially harmful detonation.
• Supports optimum ignition timing under changing operating conditions.
• Helps the engine adapt to variations in load and operating conditions.
• Contributes to smooth and efficient combustion.
• Supports consistent engine performance.
• Helps maintain the intended balance between performance and engine protection.
• Replaces a failed, damaged or unreliable knock sensor.
• Restores correct input to the engine-management system.  

Symptoms Of Wear Or Failure:

• Check engine or engine-management warning light.
• Knock sensor-related diagnostic fault codes.
• Reduced engine power.
• Sluggish acceleration.
• Poor throttle response.
• Engine operating in a reduced-performance or protective strategy.
• Increased fuel consumption.
• Rough or inconsistent engine operation.
• Audible pinging or knocking under acceleration or load.
• Intermittent engine-management faults.
• Wiring or connector damage around the sensor.
• Diagnostic readings indicating an implausible or missing knock sensor signal.  

Why Replacement Matters:

• Detonation occurs when combustion within the cylinder does not proceed in the intended controlled manner. Instead, abnormal pressure waves can develop, producing the characteristic phenomenon known as engine knock.
• Persistent or severe knock can subject pistons, cylinder walls, bearings and other internal engine components to unusually high mechanical and thermal loads. The knock monitoring system helps protect against this by allowing the ECU to respond quickly when abnormal combustion is detected.
• If a knock sensor fails, the ECU may no longer receive reliable information about combustion vibration. Depending on the engine-management strategy, it may compensate by retarding ignition timing or otherwise restricting performance to provide a greater safety margin.
• This can result in noticeably reduced power or efficiency even though the engine continues to run.
• Conversely, an inaccurate sensor signal can interfere with the ECU's ability to optimise ignition timing correctly.
• Replacing a defective component with the correct Porsche Knock Sensor 95890537700 helps restore accurate combustion monitoring, appropriate ignition control and the engine protection strategy designed into the vehicle.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95890537700

The product you are viewing cross references to these numbers

Knock Sensor.

Restore accurate combustion monitoring and dependable engine-management operation with this OE Match Knock Sensor. Designed for compatible Porsche applications, the knock sensor monitors engine vibrations associated with abnormal combustion, allowing the engine control unit (ECU) to respond when detonation or engine knock is detected.

Fits:

Diagram Ref No 21

During normal operation, the ECU continually adjusts engine parameters to achieve an effective balance between performance, efficiency and engine protection. The knock sensor plays an important role in this process by detecting characteristic vibration frequencies produced when combustion does not occur as intended.

When knock is detected, the ECU can adjust ignition timing and other applicable operating parameters to reduce detonation. This helps protect internal engine components from the excessive pressure and temperature associated with prolonged engine knock.

A faulty knock sensor may provide an incorrect, intermittent or missing signal. This can trigger an engine-management warning and may cause the ECU to adopt more conservative ignition settings, potentially resulting in reduced performance or efficiency.

This OE Match Knock Sensor provides a high-quality replacement for a defective or damaged original sensor, helping restore accurate knock detection and correct engine-management response.

What This Product Does:

• Detects engine vibrations associated with detonation or abnormal combustion.
• Sends combustion vibration information to the ECU.
• Helps the engine-management system identify engine knock.
• Allows ignition timing to be adjusted when knock is detected.
• Helps protect internal engine components from damaging detonation.
• Supports optimum ignition timing under changing operating conditions.
• Helps maintain smooth and efficient combustion.
• Supports consistent engine performance and throttle response.
• Allows the ECU to adapt appropriately to engine load and operating conditions.
• Replaces a failed, damaged or unreliable knock sensor.
• Provides an OE Match alternative for compatible Porsche applications.  

Symptoms Of Wear Or Failure:

• Check engine or engine-management warning light.
• Knock sensor-related diagnostic trouble codes.
• Reduced engine power. Sluggish acceleration.
• Poor or inconsistent throttle response.
• Engine entering a reduced-performance or protective operating strategy.
• Increased fuel consumption.
• Rough or inconsistent engine operation.
• Audible pinging or knocking during acceleration.
• Knock particularly noticeable under heavy engine load.
• Intermittent engine-management warnings.
• Damaged knock sensor wiring or connector.
• Diagnostic testing showing an implausible, intermittent or missing sensor signal.  

Why Replacement Matters:

• Engine knock or detonation occurs when combustion inside the cylinder becomes abnormal, creating uncontrolled pressure waves rather than the intended smooth combustion process.
• Persistent detonation can expose pistons, bearings, cylinder walls and other internal engine components to increased mechanical and thermal stress. Severe or prolonged knock can potentially contribute to expensive internal engine damage.
• The knock sensor helps prevent this by giving the ECU the information needed to identify abnormal combustion and make appropriate ignition adjustments.
• If the sensor fails or sends unreliable information, the ECU may no longer be able to determine accurately whether knock is occurring. Depending on the engine-management strategy, it may compensate by using conservative ignition timing to provide additional engine protection.
• While this can reduce the risk of damage, it may also result in reduced power, poorer throttle response and increased fuel consumption.
• A defective sensor can also create persistent diagnostic faults or warning lights, making it more difficult to identify other genuine engine-management problems.
• Replacing a failed sensor with this OE Match Knock Sensor helps restore accurate combustion monitoring, appropriate ignition control and the engine protection functions built into the management system.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

95890537700

The product you are viewing cross references to these numbers