Rekeying a Kwikset lock yourself is entirely possible as a DIY task — no locksmith licence is required, and with a Kwikset rekeying kit you can change which key operates your lock in under 30 minutes. This is a popular option when you've moved into a new home, lost a key, or want to stop an old key from working without replacing the whole lockset.
What Does Rekeying Actually Mean?
Rekeying means changing the internal pin configuration of your lock cylinder so that only a new key will operate it. The lock hardware itself stays in place — you're simply swapping out the small driver pins and key pins inside the cylinder to match a new key cut. This is different from replacing the entire lock, and is generally much cheaper.
Rekeying is a smart move when:
- You've just bought or rented a property and don't know who has copies of the existing key
- A flatmate or contractor has moved on
- You want multiple locks to work on one key (keying alike)
Tools and Materials You'll Need
Before you start, gather the following:
- Kwikset Rekeying Kit — available from Bunnings or Mitre 10. Kwikset also sells their own branded SmartKey Re-Key Kit for SmartKey-series locks (a different, simpler process — see below).
- Your current working key (you must have the existing key to rekey a standard pin-tumbler lock)
- A plug follower (usually included in the kit)
- A key gauge or pinning tray (usually included)
- Needle-nose pliers or tweezers
- A small flathead screwdriver
| Item | Typical Approximate Cost (NZ, as a guide) |
|---|---|
| Kwikset Rekeying Kit | $25–$50 |
| Replacement lock (if needed) | $60–$150+ |
| Professional locksmith rekey | $80–$180+ per lock |
Prices are approximate guides only and will vary by retailer and region.
Step-by-Step: Rekeying a Standard Kwikset Pin-Tumbler Lock
Step 1 — Remove the Lock from the Door
Use a screwdriver to remove the interior rose or trim plate, then unscrew and pull the lock cylinder (plug) from the door. Refer to your lock's instruction sheet if you're unsure — Kwikset provides documentation with most of their products.
Step 2 — Remove the Cylinder Plug
Insert your current working key and turn it 90 degrees. Use the plug follower tool (from your kit) to push the plug out of the cylinder housing. Keep the follower pressed firmly against the back of the plug as you slide it out — this stops the driver springs and pins from flying out.
Step 3 — Remove the Old Key Pins
With the plug out and your old key still inserted, tip the plug so the key pins fall into your pinning tray. Note the order of the chambers (usually 5 or 6 pins for Kwikset locks).
Step 4 — Insert the New Key and New Pins
Insert your new key into the plug. Using the key gauge included in your kit, determine which size replacement key pins you need for each chamber — the pin should sit flush with the top of the plug when the correct key is inserted. Load the new pins into each chamber in order.
Step 5 — Reassemble the Cylinder
Carefully slide the plug back into the cylinder housing using the follower tool to keep the driver pins in place. Once the plug is fully seated, remove the follower. Return the cylinder to the lock body and reinstall the lock on the door.
Step 6 — Test Thoroughly
Test your new key several times — both locking and unlocking — before closing the door. Also confirm your old key no longer operates the lock.
Rekeying a Kwikset SmartKey Lock
If your Kwikset lock has SmartKey technology (look for a small slot beside the keyhole), the process is much simpler and doesn't require disassembly:
- Insert the current working key and turn 90 degrees clockwise.
- Insert the SmartKey tool (a small pin) into the SmartKey slot and press firmly until you feel a click.
- Remove the SmartKey tool, then remove the current key.
- Insert your new key and turn 90 degrees back to the upright position.
- Remove the new key — rekeying is complete.
Always test the new key multiple times before relying on it.
Important Safety and Security Notes
- Keep your old key until you've confirmed the new key works reliably. Locking yourself out is a frustrating and avoidable mistake.
- Rekeying does not upgrade the security grade of your lock. If your lock is old, worn, or a low-security grade, consider replacing it entirely.
- For rental properties in New Zealand, landlords have obligations around locks and security under the Healthy Homes standards. Check your tenancy agreement before changing locks.
- If you're unsure about the security of your home, Your local council can provide guidance on general property safety.
When to Call a Professional
While rekeying is a legitimate DIY job, there are times when it's best to bring in a qualified locksmith from tradedirectory.co.nz:
- You don't have the current working key — a locksmith can pick or decode the lock
- The lock is damaged, worn, or stiff — internal wear can make DIY rekeying difficult and may mean replacement is needed
- You need high-security locks installed (e.g. after a break-in)
- You're rekeying a commercial or multi-unit property with many locks
- You want a master key system set up across multiple locks
Licensed locksmiths are not regulated under the same restricted-work framework as electricians or plumbers in New Zealand, but a reputable professional will carry appropriate insurance and trade experience. Always ask for references or check reviews.
