The wheel lock size isn’t a single universal measurement. A 2017 Honda Civic that was equipped with wheel locks uses a factory locking lug nut and a matching key. The regular lug nuts use a 19 mm socket, but the locking nut requires its specific OEM key to remove.
In practice, some Civics may not have locking lug nuts at all, depending on trim and prior service work. If your car did come with wheel locks, you’ll need the original key or a dealer-issued replacement to remove the lock without damaging the wheel or studs. If the key is lost, you’ll typically need to obtain a replacement through Honda or a qualified locksmith using the vehicle’s VIN and ownership documentation.
How wheel locks work on the Civic
Wheel locks are a theft-deterrent feature. Each set uses a locking lug nut with a unique pattern that requires a matching key to install or remove. While the standard lug nuts on many Civics use a 19 mm socket, the locking nut itself is not compatible with a standard socket and must be removed with the dedicated key.
Finding the wheel lock key and code
To identify or locate the wheel lock key or code, check these common places where it’s typically stored.
- Spare tire toolkit in the trunk, often in a small pouch labeled for the wheel lock key.
- Under the floor mat in the cargo area or within the toolkit compartment.
- The owner's manual or maintenance booklet, which sometimes lists the wheel lock code or pattern.
- A card or sticker that came with the wheel lock kit, sometimes labeled with a "Locking Lug Nut Code" or pattern identifier.
Having the key or code on hand lets you remove the lock with the correct key and a standard lug wrench or torque wrench as needed. If you cannot locate the key, contact the dealership and provide your VIN to obtain a replacement key or code.
What to do if you’ve lost the wheel lock key
If the wheel lock key is missing or damaged, you have several options to regain access to your wheels.
- Contact a Honda dealership or the original selling dealer with your VIN and proof of ownership to order a replacement wheel lock key or to obtain the wheel lock code.
- Visit a licensed locksmith who has experience with OEM wheel lock patterns; they may be able to identify the pattern from the lock itself and provide a working key or remove the lock safely.
- As a last resort and with professional help, a locksmith or shop may drill out the locking lug nut and replace the locking set with a standard lug nut kit—or install a new locking lug set with a new key.
- Consider replacing the entire wheel lock kit with a new, standardized set if you frequently rotate tires; keep the new key in a secure location with your spare tire kit.
Conclusion: Once you replace or recover the key, store it securely and ensure future removals can be performed without damage to wheels or studs.
Summary
There isn’t a single universal wheel lock size for the 2017 Honda Civic. If your car uses wheel locks, the regular lug nuts use a 19 mm socket, but the locking nut requires its dedicated OEM key. If the key is missing, contact Honda or a qualified locksmith with your VIN to order a replacement, and keep the key with your spare tire kit for future service needs. If your Civic didn’t come with wheel locks, there is nothing to size or replace.