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How do you fix door lock when your key just spins round trying to unlock car?

Possible causes and solutions for a key spinning in the car lock:

1. Inspect Key:

- Ensure that you are using the correct key for your car. Double-check the key shape and teeth to ensure they match.

2. Clean Key and Lock:

- Dirt or debris in the key or lock mechanism can cause the key to slip. Use a soft cloth and rubbing alcohol to clean both the key and the lock.

3. Lubricate Lock:

- Apply a small amount of graphite powder or a lubricant specifically designed for locks into the lock. Avoid using oil-based lubricants as they may attract dirt.

4. Check Lock Cylinder:

- If the lock cylinder is worn or damaged, it can cause the key to spin. A professional locksmith or mechanic can inspect and replace the lock cylinder if necessary.

5. Frozen Lock:

- In cold climates, moisture inside the lock can freeze, preventing the key from turning. Gently warm the key and the lock with a hairdryer or a heat source (not too hot). Apply a de-icer or lubricant designed for locks.

6. Bent or Damaged Key:

- Over time, keys can become slightly bent or damaged. In such cases, the key may not align correctly with the lock pins. Consider getting a new key cut from a reliable locksmith.

7. Worn Key Teeth:

- With extensive use, the teeth on your key can wear down, causing it to slip in the lock. If the key looks worn, have it replaced by a professional.

8. Internal Lock Issue:

- There may be an underlying problem within the lock mechanism, such as a broken spring or malfunctioning internal parts. A professional locksmith or mechanic can diagnose and repair the problem.

Note:

If the key continues to spin without unlocking the car door, it's best to consult a professional automotive locksmith or a mechanic to prevent further damage to the lock or key. They can accurately diagnose the issue and implement the necessary repairs or replacements.