Contents: Removal the trunk lid trim ↓ Removal the trunk lid lock ↓ Installing the trunk lid lock ↓ Adjusting the trunk lid lock ↓
Removal the trunk lid trim
1. Using a Phillips screwdriver, unscrew the screws that secure the trim to the lid (one screw is located at the top of the trim on the left pillar, the rest are at the bottom of the trim).

2. Using a puller or a slotted screwdriver, remove the buttons of the four holders of the upper trim fastening, and then the holders themselves.

3. With a slotted screwdriver (putting a cloth underneath it) we pry up the lower part of the lid trim and remove the trim.

Removal the trunk lid lock
1. Remove the inner lining of the trunk lid.
2. Using a slotted screwdriver, unscrew the screw securing the lock drive rod.

3. Using a 10 mm deep-head socket wrench, unscrew the three nuts securing the lock.

4. Disconnect the rod from the electric drive and remove the lock.

Installing the trunk lid lock
We install the trunk lid lock and all previously removed parts on the car in the reverse order of removal.
Note: Before installing the lower trim of the trunk lid, check the operation of the lock, the reliability of the locking of the trunk lid and, if necessary, adjust the lock.
Adjusting the trunk lid lock
If the trunk lid does not lock properly in the closed position (opens spontaneously when the car is moving on an uneven road or you have to slam the trunk lid hard to close it), it is necessary to adjust the lid lock. Also, adjustment may be required after replacing the lock and its elements, changing the position of the lid in the opening and performing other repair work.
It is convenient to check the operation of the lock from inside the car by folding the rear seat.
The crossbar of the lock (3) must enter the groove of the lock (4) without touching the edges of the groove, and the guide pin (1) must press the spring-loaded socket (2).

If the crossbar of the lock catches the edges of the groove, remove the lower trim of the trunk lid. Using a 10 mm socket wrench, loosen the three nuts securing the lock mechanism. Having set the lock to the optimal position, tighten the nuts.
Helpful Hint: If the oval holes in the lock are not large enough to adjust the size, you can remove the lock and use a round file to bore out the holes. You can also place washers or a set of homemade adjusting shims (1) under the lock retainer, cutting them out of sheet metal.

If the guide pin enters the socket at an angle, use a 10 mm socket wrench to loosen the two bolts (2) securing the retainer. By moving the retainer to the side, we ensure that the spring-loaded socket (3) is located on the same axis as the pin. By moving the retainer back and forth, we adjust the tightness of the trunk lid closure. Having found the optimal position of the retainer, we tighten the bolts securing it.
Helpful Hint: If the above adjustment does not achieve the desired result, you can remove the tenon together with the bracket (1), file down the mounting holes and file down the tenon.

Trunk lid lock drive on a VAZ 2112: 1 - transverse thrust; 2 - lock drive lever; 3 - longitudinal thrust; 4 - locking mechanism of the lock; 5 - guide pin; 6 - motor-reducer rod; 7 - gear motor; 8 - lock switch (cylinder); 9 - motor-reducer wiring block
