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Lost Car Keys

If you’ve lost your car keys, you most likely need a new key cut and programmed to your vehicle – or, if there’s any chance someone else could have found them, your locks rekeyed so the old key no longer works. This is a same-day job in most cases. Your local Blackthorn Locksmith & Security team can handle both the key and the lock side of this, depending on what you need.

Call (818) 390-9007

Losing a car key isn’t just an inconvenience. Modern vehicle keys often contain a transponder chip that has to be programmed to communicate with your car’s immobilizer. A cut key without the right programming won’t start the vehicle. And if the key went missing somewhere it could have been picked up – a parking lot, a restaurant, a gym – there’s a real question about whether your vehicle is still secure. A locksmith can help you figure out which situation you’re actually in and what to do about it.

Why It Happens

The Key Was Simply Lost or Misplaced

This is by far the most common reason someone ends up searching for help. The key left a pocket, fell out of a bag, or got set down somewhere unfamiliar. If you retraced your steps and came up empty, and you have no reason to believe anyone found it, this is a straightforward replacement job – a new key cut and programmed. No security change is necessary unless you want one.

The Key Was Stolen or Found by Someone Unknown

If the key went missing in a public place, or you suspect it was taken, the situation is different. Someone with your key could locate and access your vehicle. In this case, the right move is rekeying or replacing the locks on the vehicle alongside getting a new key made. A locksmith can walk you through what that looks like for your specific make and model.

You Only Ever Had One Key

Some people go years with a single key, and when it’s gone, there’s no backup to work from. This also means a locksmith may need to generate a new key from the vehicle’s lock or from the VIN – a process that takes longer than duplicating an existing key. If this is your situation, let the person who answers your call know, so the right technician and equipment are dispatched.

A Key Fob Was Lost Along With the Mechanical Key

Many modern keys are a combined unit – a transponder or fob attached to a cut blade. Losing the whole assembly means losing both the physical key and the electronic component that communicates with the vehicle. Replacing these requires programming, not just cutting. The process varies significantly by vehicle make, year, and trim, which is why it’s worth confirming the details when you call.

What to Do Right Now

• Retrace your steps once, calmly. Check coat pockets, bags, couch cushions, and anywhere you sat down in the last few hours. A surprising number of keys turn up within the first ten minutes of a focused search.
• Don’t leave your vehicle unlocked while you wait. If you have a spare key, use it to secure the car. If you don’t, note where the vehicle is and make sure it’s in a reasonably safe location before calling for help.
• Take stock of where the key was last seen. The more specific you can be about when and where you had it, the easier it is for a locksmith to advise whether a simple replacement is enough or whether rekeying makes sense too.
• Have your vehicle information ready when you call. Year, make, model, and trim level – plus your VIN if you can access it through the driver’s door jamb or your registration – helps the team confirm what’s needed before anyone is dispatched.
• Don’t attempt to bypass the ignition yourself. Vehicles have immobilizer systems that can be triggered or damaged by attempts to start the car without the correct key. Leave that to a trained technician.

How We Fix It

When your local Blackthorn Locksmith & Security team arrives, the technician starts by confirming your vehicle details and verifying ownership – standard practice on any key job, and something a legitimate locksmith will always do. From there, the path depends on what you need.

If it’s a straightforward replacement, the technician cuts a new key to your lock and programs the transponder or fob to your vehicle’s system. If your vehicle requires dealer-level programming, the technician will tell you that before anything starts. If rekeying or lock replacement is warranted, that’s assessed and priced separately.

This falls under our Residential Locksmith service. Before any work begins, you receive a written price – specific to your job, covering everything. That’s the price on the invoice. No verbal estimates, no add-ons at the end. The job is also covered by the 365-Day Done Right Promise: if something isn’t right, we make it right.

Frequently Asked Questions

Get It Fixed

Call (818) 390-9007 – a live person answers every call, day or night, every day of the year. Your local Blackthorn Locksmith & Security team will confirm what’s needed, give you a written price before anything starts, and get you back on the road. No voicemail, no waiting.

Written by Shane Delaney, Owner & Lead Technician, Blackthorn Locksmith & Security.