Electronic Control Units

Control unit diff lock longitudinal. 

Fits:
Porsche 955 Cayenne - 2005 to 2006

For cars with Option Code
G0R - Tiptronic S

Click 'Zoom in' for large parts diagram.
Diagram ref no 8



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95561802311

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Seat position control unit. For Cars with:
driver memory package (I3L4) and
12-way electrical adjustment for both front seats + memory (I3PN)

Fits:
Porsche 955 Cayenne 2003-06
Porsche 957 Cayenne 2007-10

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

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95561874000

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Electronic module for the steering column combination switch fitted Cayenne models from 2003 to 2010. Suitability is determined by the vehicle specification and the listed PR codes. Please choose the non-heated version unless your Cayenne is coded to 2PH (Leather steering wheel for airbag system - 3 spokes, heated)

Fits

• Porsche Cayenne 955 2003–2006
• Porsche Cayenne 957 2007–2010
  
  Check fitment for your specific vehicle (model, year, engine) before ordering.
  
  

Diagram ref no 1

What This Product Does

This electronic unit forms part of the steering column combination switch assembly. It provides the module required for the assembly to process steering-column control inputs within the vehicle's electrical system.

Functions

• Forms the electronic section of the steering column combination switch
• Supports communication between applicable stalk controls and the vehicle electrical system
• Integrates with the associated steering-column switch components
  
  

Technical Details

• Genuine Porsche component
• Part number: 95561329101
• Diagram description: Electronic unit
• Heated version option code: PR:2PH
  
  

Symptoms of Fault

• Intermittent operation of steering-column controls
• One or more stalk-operated functions failing to respond
• Random or inconsistent indicator, wiper or lighting-control behaviour
• Electrical faults that change with steering-column movement
• Stored fault information relating to the steering-column switch assembly
  
  

Why Replacement Matters

A defective module can interrupt operation of functions controlled through the combination switch assembly. Diagnosis should also include the stalk switches, connectors, wiring, fuses and relevant control circuits, as similar symptoms can have several causes. Confirm the part number and PR codes against the vehicle's VIN and equipment data before replacement.

FAQs

• Is this the complete steering column switch assembly?
  No. It is the electronic module within the combination switch assembly; associated stalk switches, housings and fixings are separate components.
• Does it fit every 955 and 957 Cayenne?
  Yes but depends on the vehicle's PR codes and equipment specification.
• How should compatibility be checked?
  Compare part number 95561329101/201 and the listed PR codes with the VIN-based Porsche parts information for the vehicle.
• Can intermittent stalk faults confirm that this module has failed?
  No. Wiring, connectors, fuses, stalk contacts and other control components should also be tested.
• Is coding or calibration required?
  Installation requirements can vary with vehicle equipment. Refer to the applicable Porsche workshop procedure or use a suitably equipped specialist.

Related reference numbers
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95561329

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Tiptronic Control Unit.
Restore proper centre differential/transfer-case lock control in your Porsche Cayenne 955 chassis, 2003-2004. This ECU module governs the longitudinal lock mechanism of the drive system, ensuring correct power distribution front to rear, correct 4WD behaviour and stable traction. Ideal for replacing a failed or malfunctioning unit, it enables your 4WD system to perform reliably.

Fits:

• Porsche 955 Cayenne 3.2L V6 2003-04
• Porsche 955 Cayenne S 4.5L V8 2003-04
• Porsche 955 Cayenne Turbo 4.5L 2003-04

Cars With Option Codes:
G0R - Tiptronic S

Diagram Ref No 8

What This Product Does:

• In 4WD/all-wheel-drive systems the “drive longitudinal lock” refers to locking mechanisms of the centre differential or transfer case — this ensures power is correctly distributed between front and rear axles.
• This ECU monitors and controls that locking system: it takes inputs (wheel speeds, differential states, driver commands) and commands the actuator (solenoids, clutches) in the transfer case or centre diff to engage or release the lock.
• Proper function ensures that the vehicle’s 4WD system behaves correctly (engaging or disengaging locks when required), which impacts traction, stability, driveability and sometimes road regulations (e.g., snow/ice mode).
• If this unit fails, the locking system can get stuck open or closed, produce fault codes, and affect driving behaviour (especially in low-traction or off-road situations).

Symptoms Of Failure Or Need For Replacement:

• A fault code related to the centre differential, transfer case, or “longitudinal lock” is present in the diagnostics.
• Loss of 4WD function or “lock” function — e.g., the vehicle stays in 2WD when it should lock, or it stays locked when it shouldn’t.
• Illumination of warning lamps related to drivetrain/4WD/traction.
• Unusual noises from the transfer case / centre diff (clutch slipping, grinding) that might be triggered by improper lock control.
• Intermittent behaviour (sometimes works, sometimes doesn’t) which can indicate ECU logic/actuator control failure rather than a purely mechanical fault.

Why Replacement Matters:

• Because the control unit is central to drivetrain behaviour, a fault here can drastically degrade vehicle performance, safety (traction/stability) and drivability.
• For a Porsche Cayenne early model (955), these units are becoming harder to source or may be superseded — replacing a failing unit proactively protects the vehicle.
• Restoring the correct function of the 4WD/centre differential lock restores the vehicle’s intended performance envelope, especially under load, off-road or in low-traction conditions.
• From a maintenance/resale perspective: a vehicle with a properly functioning transfer-case lock system is more desirable; faults here reduce value.
• Lastly, diagnosing and replacing the ECU early may prevent secondary damage (mechanical wear from improperly controlled locks/clutches).

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95561802305

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