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Porsche > 997 (911) MK2 2009-2012 > 997 MKII Carrera C2 3.6L 2009-12 > Gearbox / Transmission > Gearbox Parts >

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PDK Distance and Speed Sensor - 7 Speed. Porsche 997.2 / 991.1 / 991.2 / 987.2 / 981 / 718 Boxster & Cayman - PDKDS
4
PDK Distance and Speed Sensor - 7 Speed. Porsche 997.2 / 991.1 / 991.2 / 987.2 / 981 / 718 Boxster & Cayman
PDKDS
Product Information
Product Information
PDK Distance & Speed Sensor for 7-Speed PDK

A direct replacement internal PDK distance and speed sensor assembly for Porsche models equipped with the 7DT45 or 7DT70 7-speed PDK transmission. The sensor combines the distance and speed sensing components with the wiring harness and OEM-style connector in an integrated assembly, allowing the faulty original unit to be removed and replaced without modifying or splicing the wiring..

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

Designed to address common internal PDK sensor failures that can cause transmission warning messages, fault codes, limp mode and loss of normal transmission operation.

What Does the PDK Distance & Speed Sensor Do?

The Porsche PDK transmission relies on internal sensors to monitor the position and movement of its shift mechanisms.

These signals allow the PDK control system to determine which gears are selected and accurately control gear engagement. If the sensor produces an incorrect, intermittent or implausible signal, the transmission control unit may no longer be able to reliably determine the position of the relevant shift rod.

This can trigger fault codes, dashboard warnings or transmission failsafe/limp mode.

Common Symptoms of PDK Sensor Failure

A failing distance or speed sensor may cause:

  • PDK transmission warning messages
  • Transmission entering limp or failsafe mode
  • Loss of normal gear selection
  • Difficulty selecting particular gears Loss of reverse gear
  • Intermittent transmission operation
  • Vehicle becoming undrivable
  • “Transm. fault Poss. no R gear…” or similar dashboard warnings
  • Stored PDK transmission fault codes

These symptoms can have other causes, so correct diagnostic testing should always be carried out before replacing the sensor.

Why Replace the Sensor Instead of the Complete PDK Transmission?

An internal sensor fault does not necessarily mean that the complete PDK gearbox has mechanically failed.

Where professional diagnosis confirms that the distance/speed sensor is responsible for the fault, replacing the defective internal sensor can provide a significantly more economical repair than replacing the complete transmission.

This makes the sensor particularly valuable for Porsche specialists and transmission repairers carrying out component-level PDK repairs.

New Integrated Sensor Assembly

The sensor is supplied as a brand-new component and is not used, salvaged or remanufactured.

Its integrated construction incorporates the sensor harness and OEM-style plug, eliminating the need to splice or modify the wiring during installation.

The housing is precision CNC-machined from aluminium alloy to provide excellent thermal stability and resistance to the high temperatures, vibration and demanding operating conditions found inside the PDK transmission.

Technical Design Features

The sensor incorporates several features designed to provide accurate and stable operation:

  • Integrated sensor and wiring harness assembly
  • No wiring modification or splicing required
  • Dual-axis induction design
  • Designed for strong resistance to electrical interference
  • Automotive-grade integrated electronics
  • Centralised chip layout for stable signal transmission
  • 0.2mm ultra-thin PEEK sensing window
  • Designed to minimise eddy-current effects
  • CNC-machined aluminium alloy housing
  • Improved resistance to heat and vibration
  • Designed to address heat-related deterioration associated with original sensors

Common Porsche PDK Fault Codes

A failed distance sensor can be associated with a number of Porsche PDK diagnostic trouble codes, including:

  • P1731 – Displacement Sensor Shift Rod Gears 4/6: Implausible Signal
  • P1732 – Displacement Sensor Shift Rod Gears 5/7: Implausible Signal
  • P1733 – Displacement Sensor Shift Rod Gears 1/3: Implausible Signal
  • P1734 – Displacement Sensor Shift Rod Gears 2/R: Implausible / Incorrect Signal
  • P1735 – Distance Sensor Shift Rod Gears 4/6: Short-Term Fault
  • P1736 – Distance Sensor Shift Rod Gears 5/7: Short-Term Fault
  • P1737 – Distance Sensor Shift Rod Gears 1/3: Short-Term Fault
  • P1738 – Distance Sensor Shift Rod Gears 2/R: Short-Term Fault

The presence of one of these codes does not automatically confirm sensor failure. The transmission should be professionally diagnosed before parts are replaced.

Compatible PDK Transmissions

  • 7DT45 7-speed PDK
  • 7DT70 7-speed PDK

Not compatible with Porsche 911 992 models, as the 992 generation does not use the 7DT45 or 7DT70 PDK transmission.

Transmission type should always be confirmed before ordering, as model designation alone does not guarantee compatibility.

Professional Installation Required

Replacement of internal PDK sensors is a specialist procedure and should not be considered a simple DIY repair.

Installation should be carried out by an experienced Porsche or PDK transmission specialist with the appropriate diagnostic equipment.

Correct diagnosis, installation, calibration and programming are essential to ensure the transmission operates correctly after replacement.

PDK Distance & Speed Sensor Replacement

PDK transmission problems can sometimes result in owners being advised that a complete gearbox replacement is required. However, when diagnostic testing identifies an internal distance or speed sensor as the source of the problem, component-level repair may provide a considerably more cost-effective solution.

Replacing the faulty sensor allows a qualified transmission specialist to repair the affected part of the PDK system without automatically replacing an otherwise serviceable transmission.

For Porsche 997, 991, 987, 981 and 718 models equipped with compatible 7DT45 or 7DT70 transmissions, this replacement sensor provides a purpose-designed solution for repairing confirmed internal PDK sensor faults.

PDK Distance and Speed Sensor - 7 Speed. Porsche 997.2 / 991 - PDKDS/1
3
PDK Distance and Speed Sensor - 7 Speed. Porsche 997.2 / 991
PDKDS/1
Product Information
Product Information

911 PDK Distance & Speed Sensor

The Porsche PDK Distance and Speed Sensor is a critical component in the dual-clutch transmission system of the 911. 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 997 MKII Carrera C2 3.6L 2009-12
Porsche 997 MKII Carrera C4 3.6L 2009-12
Porsche 997 MKII Carrera C2S 3.8L 2009-12
Porsche 997 MKII Carrera C4S 3.8L 2009-12
Porsche 997 MKII GT3 2010-11
Porsche 997 MKII Turbo 2010-13
Porsche 997 MKII GT2 RS 2011-13
Porsche 991.1 Carrera C2 3.4L (350Bhp) 2012-16
Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
Porsche 991.1 Carrera C4 3.4L (350Bhp) 2012-16
Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
Porsche 991.1 Turbo 3.8L (520bhp) 2014-16
Porsche 991.1 Turbo S 3.8L (560Bhp) 2014-16
Porsche 991.1 R 4.0L (500 Bhp) 2016
Porsche 991.1 GT3 3.8L (475Bhp) 2014-16
Porsche 991.1 GT3 RS 4.0L (500Bhp) 2015-16
Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
Porsche 991.2 Speedster 4.0L (510Bhp) 2019
Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
Porsche 991 GT3 Cup 2018-2019

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/1 and PDKDS/2 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 Nordlicht 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 and PDKDS/1 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 911 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 911s, 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 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 911 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              

Reverse light switch. Porsche 997 Carrera - 99761318001, 99761318000
3
Reverse light switch. Porsche 997 Carrera
Special Order item
99761318001
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Product Information
Reverse light switch.

porsche

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

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

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99761318001
99761318001
99761318000

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Reverse light switch. Porsche 997 Carrera - 99761318001, 99761318000 - FN-182
3
Reverse light switch. Porsche 997 Carrera
99761318001/1
Product Information
Product Information
Reverse light switch.

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

Diagram ref no 3

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

99761318001
99761318001
99761318000

The product you are viewing cross references to these numbers
DISPLAYING 1 to 4 (of 4 products)
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About Switches / Selector Switches

 Porsche Gearbox & Selector Switches | Precision Sensors for Reliable Gear Position Detection

Gearbox and selector switches are vital electrical components that monitor and communicate the position of your Porsche’s transmission selector mechanism. These switches control various functions such as reverse lights, neutral safety systems, and gear recognition sensors — ensuring smooth operation and accurate feedback to your vehicle’s control systems.

At Design911, we supply high-quality gearbox and selector switches engineered to match or exceed original design standards. Built from durable materials and precision-calibrated for reliable electrical contact, our switches guarantee long-lasting performance and accurate signal transmission across all Porsche models.

Whether you’re diagnosing an intermittent gear signal fault or restoring full gearbox function, our gearbox switches deliver consistent reliability and compatibility with both manual and automatic transmissions.

What Do Gearbox Switches & Selector Switches Do?

Gearbox and selector switches serve as sensors that detect the position of internal or external gearbox components, sending signals to the ECU or dashboard systems.

Core Functions:

  • Detect and communicate gear position to the ECU or driver display.
  • Activate reverse lights and safety interlocks.
  • Enable correct start/stop conditions (neutral or park).
  • Support smooth gear changes and transmission coordination.
  • Ensure accurate feedback for modern electronic control systems.

Without properly functioning switches, gear position data can become inaccurate, leading to shifting issues, warning lights, or even start-prevention in automatic models.

Why Do Gearbox & Selector Switches Fail or Malfunction?

Due to constant exposure to vibration, oil, and heat, gearbox switches are prone to electrical degradation or mechanical failure over time.

Common Causes of Failure Include:

  • Corrosion or oil ingress into the switch housing.
  • Worn or damaged electrical contacts causing intermittent signals.
  • Heat damage or cracked casings from prolonged use.
  • Wiring or connector corrosion from moisture exposure.
  • Mechanical wear in internal selector linkages affecting engagement.

When gearbox or selector switches fail, you may notice issues such as reverse lights not activating, erratic gear indication, or inability to start the car in neutral or park.

Why Replace Your Porsche Gearbox / Selector Switches?

Replacing faulty gearbox switches ensures accurate gear detection, restores electrical safety functions, and eliminates error codes. High-quality replacements improve electrical reliability and responsiveness, ideal for both restoration and performance applications.

Key Benefits:

  • Restores accurate gear position signalling.
  • Eliminates dashboard warning lights and shifting faults.
  • Prevents start-prevention or safety lockout issues.
  • Ensures proper communication between gearbox and ECU.
  • Compatible with Porsche manual, automatic, and PDK systems.
  • Easy-fit replacements designed for long-term durability.

It’s recommended to inspect and replace gearbox or selector switches during transmission servicing to prevent future electrical or safety-related faults.

Highlights

  • Premium Porsche gearbox and selector switches.
  • Designed for precision gear position detection.
  • Reliable electrical performance and durable construction.
  • Compatible with Porsche 911, Cayman, Boxster, and PDK models.
  • Essential for gearbox safety, signalling, and performance.
  • Ideal for servicing, repairs, and complete transmission rebuilds.

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