Astra L4-1.8L (2009)
Ignition Switch Lock Cylinder: Procedures
Key and Lock Cylinder Coding
Door Lock Cylinder Coding and Assembly
1. Determine key code and cut sequence from the dealer world lookup information.
2. Hold the lock cylinder (2) with the key insertion end to the left.
3. Insert a tumbler spring (10) into the tumbler cavity before installing each tumbler (8).
Important: Tumblers (8) are held in place with the lock cylinder sleeve (3). Tumblers (8) do not have a retention feature. As tumblers are
installed, hold them in place with your fingers until the cylinder (2) is installed into the sleeve (3).
4. Starting with the tumbler opening closest to the key insertion end, tumbler number 1, code the lock cylinder to match the cut sequence. The
tumblers on the same side as tumbler number 1 are 1, 3, 5, and 7. Even number tumblers are installed into the opposite side of the lock cylinder.
Code one side of the cylinder (2) at a time.
5. To verify the cylinder (2) is coded properly, insert the key while holding the tumblers (8) in place. If cylinder is coded properly, the tumblers will
be flush to the surface of the cylinder (2).
6. Install the O-ring seal (11) onto the lock cylinder at the key insertion end.
7. Apply grease to the O-ring seal (11), tumblers (8) and lock cylinder (2).
