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

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..

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

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.