How to Replace an Automotive Key Door Lock Tumbler: Step-by-Step Guide

Introduction

Car door locks enable us to lock our car before leaving it unattended while feeling safe that it will be undisturbed when we return. Most locks are incorporated into the outer door handle and is connected by a series of metal control rods.

Tools and Materials Needed

• New outer door lock tumbler (OEM or compatible aftermarket)
• Flathead screwdriver
• Phillips screwdriver
• Trim removal tool or panel popper
• Ratchet with socket set (typically 8mm or 10mm)
• Torx drivers (T20/T25 depending on model)
• Needle-nose pliers
• Work light or flashlight
• Optional: Silicone spray lubricant
• Protective gloves and safety glasses

Door Lock Key &Tumbler Replacement

To begin you must roll the window up completely, and remove the door panel and moisture barrier plastics.

1. Remove Control Rods

Use a flashlight to locate the inner door access and locate the main handle control and lock rod and un-clip them.

2. Unbolt Outer Door Handle

Using a 10mm socket or wrench remove the inner door handle lock mounting bolts, this will vary with each manufacturer. Some applications offer a door handle mounting bolt access hole which can aid in the removal.

3. Remove Outer Door Handle

Place masking tape around the door handle to avoid damaging the paint. Once the mounting bolts have been removed, gently grasp the handle and lock assembly and lift up to remove it. This can take some jostling so be careful not the scratch the paint.

4. Door Lock Removal

Use a small screwdriver, or pick remove the retainer clip that holds the lock inside the handle housing, the lock cylinder will become loose and ready to be removed. Push the lock tumbler out from the outer door handle and use a shop towel to clean the handle cylinder to get ready for the new lock to be installed.

5. Install New Door Lock

A new key will be included with the new lock assembly that will be different than your old door key, (If you want the same key, the lock will need to be taken to a locksmith with the old key and rekeyed). Gently insert the lock into the door handle being careful to line up the keyway timer in the handle, this is so the orientation of the lock is correct. Grasp the lock clip and slide it back into place. Once the control rods are connected, use the key and work the lock to confirm it's proper operation, operate the door handle as well. To reassemble just reverse this order and you are all set, happy wrenching!

Conclusion

Before installation is completed inspect the door control rod clips and replace any that are damaged or broken. Be careful not to leave tools inside the door.

Watch the Video!

Please watch this video of the job being done to glean additional helpful information.

Credits

This guide knowledge base was created by the 2CarPros Team, and by Ken Lavacot: Automobile repair shop owner and certified master automobile technician of over 30 years. If you have question or need help please ask one of our experts we are happy to help. Please visit our 2CarPros YouTube Channel.