Front door lock. Porsche 955 Cayenne / 957 Cayenne LHD

Porsche Cayenne Door Lock Module - for Left Hand Drive (LHD)
The Door Lock Modules are essential electronic-mechanical units responsible for locking, unlocking and securing the doors on Porsche Cayenne 955 and 957 models.

Fits:

• Porsche 955 Cayenne 3.2L V6 2003-06
• Porsche 955 Cayenne S 4.5L V8 2003-06
• Porsche 955 Cayenne Turbo 4.5L 2003-06
• Porsche 955 Cayenne Turbo S 4.5L 2006>>
• Porsche 957 Cayenne 3.0L Diesel 2007-10
• Porsche 957 Cayenne 3.6L 2007-10
• Porsche 957 Cayenne S/GTS 4.8L 2007-10
• Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10

These modules control central locking functions, interior locking switches, key fob response, and vehicle security features. When they start to fail, owners experience everything from random locking behaviour to doors that refuse to open at all.

This replacement module offers dependable performance and restores proper locking functionality without relying on original manufacturer terminology. Designed to match the dimensions and electrical behaviour of the original component, it ensures smooth installation and reliable operation—ideal for aging Cayenne models where lock failures have become increasingly common.

What Door Lock Modules Do

Door lock modules are responsible for regulating several vehicle functions:

Primary Functions

• Locking and unlocking doors electronically
  
• Actuating the central locking system
• Processing key fob and interior switch signals
• Engaging the deadlock/anti-theft mechanism
• Ensuring doors latch securely while driving
• Supporting comfort access features (if equipped)

Without a functioning lock module, the door may not latch, may unlock unexpectedly, or may stay permanently locked.

Why Door Lock Modules Fail

Over time, the Porsche Cayenne (especially early 955/957 models) is known to suffer from lock actuator issues due to wear, aging electronics and environmental exposure.

Common Failure Causes

• Internal motor wear from repeated locking cycles
  
• Moisture intrusion leading to corrosion
  
• Electrical circuit degradation with age
  
• Temperature fluctuations weakening internal components
  
• Broken micro-switches used for door position sensing
  
• Gear wear inside the actuator mechanism
  
• Faulty connector pins causing intermittent operation

Symptoms include:

• Door won’t lock or unlock
• Random self-locking
• Key fob intermittent response
• Door cannot be opened from inside or outside
• Alarm triggers unexpectedly

These issues are extremely common on older Cayenne models, often requiring a full lock module replacement.