Reverse light switch. Porsche 997 Carrera  ❭  99761318001

Reverse light switch.



Fits:
Porsche 997.1 C2 / C4 2005-08 Manual Gearbox
Porsche 997.2 C2 / C4 2009-12 Manual Gearbox

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PDK Distance & Speed Sensor for 7-Speed PDK
The Porsche PDK Distance and Speed Sensor is a critical component in the dual-clutch transmission system. It continuously supplies the transmission control unit (TCU) with real-time position data of the gear shift rods and wheel/turbine speed. This data ensures precise gear engagement, fast shifts and smooth driving performance in everyday and high-load conditions.

Fits:
Porsche 987.2 Boxster  2009 - 2012
Porsche 981 Boxster 2012 - 2016
Porsche 981 Boxster Spyder 3.8L 2016
Porsche 718 (982) Boxster  2017>>

Porsche 987C.2 Cayman 2009 - 2012
Porsche 981 Cayman 2013 - 2016
Porsche 718 (982) Cayman 2017>>
Porsche 718 (982) GT4 4.0L 2019>>

Porsche 997.2 2009 - 2012
Porsche 991.1 2012 - 2016
Porsche 991.2 2017 - 2019

Without accurate distance and speed sensor input, the PDK system can behave unpredictably, losing its ability to shift gears correctly. When the TCU cannot detect gear positions or speed signals, it may lock the gearbox into one gear or enter a safe “limp mode,” severely limiting vehicle performance and drivability.

Please Note
The PDKDS sensors are designed for different Porsche PDK transmission layouts. The 911 transmission is effectively a mirror image of the Boxster/Cayman gearbox, meaning the sensor is mounted in the opposite orientation.

While the OEM sensor can be flipped and used in both applications, the advanced sensing technology used in the OE Match sensor requires the internal sensing elements to remain correctly positioned relative to the gearbox internals. For this reason, the PDKDS sensors use different internal orientations and are not interchangeable.

By developing a dedicated sensor for each transmission type, the output can be calibrated far more accurately to match OEM specifications. This results in improved performance, easier calibration, and greater reliability compared to universal aftermarket sensors.

Why Distance and Speed Sensors Fail
PDK gearbox sensors are exposed to extreme heat, torque spikes and constant vibration over time. Common reasons these sensors fail include:

• Wear from prolonged exposure to high transmission temperatures
• Electrical issues like broken connections, short circuits or degraded wiring
• Normal mechanical degradation from age and mileage
• Contaminated transmission fluid affecting sensor integrity

When these sensors start to fail, the transmission control unit receives incorrect or no data, which triggers fault codes and incorrect gear shift behavior.

Common Fault Signs and Error Codes
Drivers and technicians often identify distance and speed sensor failures by diagnostic trouble codes or visible symptoms, such as:

• PDK gearbox fault warning on dashboard
• Gearbox stuck in a single gear or neutral Jerky or delayed gear changes
• Error codes like P1731 to P1734 for distance sensor issues
• Fault codes such as P0730, P1743, P1744 related to speed sensor faults

These indications show that the sensor no longer reports accurate position and speed information to the transmission control unit.

Why You May Need a Replacement Sensor
If your Porsche PDK shows gearbox faults or fails to shift smoothly, a renewed PDK distance and speed sensor can restore proper transmission operation without resorting to costly gearbox replacement. Unlike full transmission swaps, which can run into tens of thousands of pounds, replacing the internal high-quality sensor pack offers a targeted fix that restores driveability and performance.

For performance enthusiasts, frequent track use or high-mileage cars, replacing failing sensors early can prevent further internal wear, avoid limp mode events and protect expensive transmission hardware.

Quality Replacement Parts for Porsche PDK Transmissions
At Design911, we source high-integrity PDK distance and speed sensors designed to meet or exceed OEM specifications for Porsche 911 / Boxster / Cayman models equipped with ZF 7DT45 or 7DT70 transmissions. These units are engineered for durability in high-heat, high-load environments and are supplied as complete assemblies with harness and connectors where applicable.

Upgrading or replacing the PDK distance and speed sensor is essential for:

• Porsche PDK owners experiencing gearbox fault codes
• Drivers who want reliable shifting and transmission response
• Vehicles with high mileage or extreme usage conditions
• Preventative maintenance before major transmission failures