Door internal lock latch. Porsche 911 1972-89 / 964 / 912  ❭  91153105

Door internal lock latch.
This internal lock latch operates as the primary engaging mechanism for the door lock assembly, securing the door closed while allowing smooth and reliable opening when actuated.

Fits:
Porsche 911 2.7L-3.3L 08/1972 - 07/1989
Porsche 912
Porsche 964

Note: Uses >>1972 original M5x12 type countersunk mounting screws

Diagram ref no 1

Over years of use, original door locks and latch mechanisms can wear, bind, or fail due to corrosion, contamination, or repeated mechanical stress - resulting in sticking doors, poor lock engagement, or difficulty opening/closing. Replacing the latch with a correctly engineered OE Match unit helps restore dependable door operation and solid lock feel.

The latch is designed for direct swap-in installation with the existing lock assembly, using original mounting points and linkage connections. It is ideal for maintenance, restoration projects, or rejuvenating a worn door locking system on classic Porsche 911 and 912 models.

The door internal lock latch engages the door striker when the door closes and holds it securely in place until the interior or exterior handle is actuated. It ensures that the door stays closed under driving loads and releases smoothly when unlocked.

Function:
•  Provides secure engagement with the door striker
•  Ensures smooth locking and unlocking action
•  Maintains proper door closure, alignment, and feel

A worn, bent, or sticky door latch can cause doors to hang open, fail to latch reliably, or operate roughly. This can lead to poor door fitment, rattles, compromised safety, and frustration when opening or closing doors. Installing an OE Match internal lock latch restores secure engagement, consistent feel, and door confidence - crucial for both everyday use and classic car reliability.

When to replace:
•  Door doesn’t latch consistently or closes loosely
•  Stiff, sticky, or rough door handle operation
•  Rattling or vibration at the door while driving
•  Corroded or worn latch hardware
•  During restoration or door lock servicing

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Related, superseded, cross reference or alternative numbers for comparison.

91153105

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