What happens when your key fob stops working in Mission Hills?
Most people find out their fob has a problem at an inconvenient moment. The doors will not unlock from across the lot, the car says key not detected, or the push-button start does nothing while you stand there holding the fob. Sometimes it is only a worn battery. Sometimes the case has cracked, the buttons have worn through, or the fob has gone through the wash in a jeans pocket. And sometimes the fob is simply gone.
Key fob replacement covers all of those situations, but they are not the same job. A fob that still works but is falling apart needs a different fix than a fob that has vanished. A car with one working key is in a far easier spot than a car with none. The first thing we do on the phone is sort out which situation you are in, because that decides what we bring and what the work involves.
This page is about replacing and programming the fob itself: remotes, flip keys, proximity keys, and push-to-start smart keys. If your problem is that the keys are locked inside the car, that is a different call, and our car lockout service in Mission Hills covers it. If you have a plain transponder key with no buttons, see our page on transponder key programming.
Which type of key fob do you have?
People use the word fob for several different things, and the type matters because it changes the process. Here is how we sort them when you call.
If you are not sure which one you have, that is fine. Tell us the year, make, and model, and describe how you start the car. We will ask a few follow-up questions, and we confirm the exact fob and programming path by VIN or in person before we promise anything.
- Remote head key or flip key: a metal blade with the remote buttons built into the head. You use the blade in the ignition and press buttons to lock and unlock. These usually need a cut blade and programming for both the remote and the chip.
- Separate remote plus a standard transponder key: the buttons live on a small fob on your keychain, and the key itself carries a chip. The remote and the chip are often programmed separately.
- Proximity key (smart key): the fob stays in your pocket or bag and the car senses it when you walk up or sit inside. Often used with a push-button start.
- Push-to-start fob: the same family as proximity keys. You press the brake and push a button instead of turning a key. Most also carry a hidden emergency blade.
- Older rolling-code remotes: simple lock and unlock remotes that may be programmed in a way that differs from newer systems.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366How we replace and program a key fob, step by step
Every vehicle family has its own quirks, so we do not run a script. The general sequence below is what you can expect from us, whether we come to you or you come to our Westwood storefront.
- You call (213) 577-1366. A person answers, any hour, and asks for the year, make, model, and whether you have any working key left.
- We tell you honestly what the job looks like for your vehicle: whether it is something we can do on site, whether we need to confirm anything by VIN, and whether this is a case where the dealer may be the only route.
- We confirm you own or are authorized to use the vehicle. Expect to show ID and proof of ownership such as registration or title. We do not skip this, and a legitimate locksmith should not either.
- We source or prepare the correct replacement fob and, where needed, cut the emergency blade or the key blade by code or by hand.
- We program the fob to the vehicle so it locks, unlocks, and starts the car. On many vehicles this includes registering the new fob with the car's computer.
- We test every function in front of you: remote buttons, proximity detection, push-button start, and the emergency blade if there is one.
- If you only had one key, we recommend a spare while we are already there, because adding a second fob is usually much easier than starting over from nothing later.
What if you have lost every key, or the car will not start at all?
Losing every fob sounds like a disaster, and it does make the job more involved, but it is routine work for an automotive locksmith. With no working key to copy, the process generally creates a new key from the vehicle's identification information and programs it directly to the car. Whether that can be done at the curb depends on the vehicle, which is why we confirm by VIN or in person rather than guess over the phone.
If this is where you are, read our page on lost car key replacement in Mission Hills alongside this one. It goes deeper on the all-keys-lost situation. For a broader overview of how we handle new keys of every type, our car key replacement page is the right starting point.
One practical point: if the fob is lost rather than stolen, you might also want older keys removed from the car's memory so a lost fob can no longer start it. Ask us about that when we program the new one. It is often a simple extra step during the same visit, though what is possible varies by vehicle.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366How much does key fob replacement cost in Mission Hills?
We do not quote a number here because an honest price depends on the vehicle in front of us. What we can do is explain what moves the cost up or down so nothing about the quote is a surprise.
When you call, we give you a clear answer based on your vehicle. Asking for the lighter-cost option is reasonable, and we will tell you if one exists, such as reprogramming a fob you already own instead of buying a new one, or having a spare made while we are already on site. Be careful with any quote that sounds unusually low over the phone without asking for your vehicle details, because the final bill often changes once the technician arrives.
- The vehicle itself: some fobs are simple remotes, while others are encrypted smart keys that cost considerably more to source.
- The fob type: a basic remote is a different part than a proximity key with a push-button start.
- Whether you have a working key: copying or adding a key from an existing one is generally less involved than all-keys-lost work.
- Whether a new fob must be ordered or can be programmed from stock or from a fob you already have.
- Whether the emergency blade also needs to be cut.
- Time of day and location: after-hours mobile service involves different costs than a daytime visit to our storefront.
- Whether anything else on the vehicle is involved, such as a damaged ignition or a faulty receiver, which we would explain before starting.
When is the dealer the only option?
Honest answer: sometimes. Some vehicles lock their key programming behind manufacturer-only tools or codes, and in those cases an independent locksmith cannot complete the job on the spot. Other vehicles are fine for locksmith work for some model years but not for others, and the information published about which is which is not always consistent.
We do not guess. If we cannot reliably program a fob for your vehicle, we will say so at the start instead of letting you pay for a trip that ends with a shrug. If it turns out you do need the dealer, we will tell you what to ask for so you do not lose time. If the issue is actually a worn or failing ignition rather than the fob, our ignition repair page explains how that is handled.
What we will not do is promise a specific outcome for a vehicle we have not confirmed. For chip and programming details on your car, we verify by VIN or in person, then tell you straight.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366Why call Wilshire Lock & Key for a key fob?
We have been in business since 1987, and that history is behind every call. David, who owns the company and is the lead technician, oversees the work. You are not being passed through a call center that sells your job to the nearest subcontractor.
We operate a real storefront at 10740 Wilshire Blvd in Westwood plus mobile service vans, so there are two ways to get the job done. Come in if you can and the car is drivable, or have us come to you if you cannot. Either way, one company handles the call, the work, and the follow-up, with no dispatch middleman between you and the person holding the programming tool.
Our phone is answered 24 hours a day, 7 days a week, year-round at (213) 577-1366. Fob problems do not keep business hours, and neither do we. For more about how our vans operate, see our mobile locksmith service in Mission Hills.
Key fob help around Mission Hills: where this comes up
Mission Hills, ZIP 91345, is a driving neighborhood. Many residents commute out through the I-405/SR-118 interchange area, and a dead fob there can leave you stuck at the worst point of the morning. Others park along the Sepulveda Boulevard corridor, where apartment parking means your fob is carried daily, dropped in bags, and sometimes lost between the car and the front door.
Apartment living along Sepulveda is a particular reason people call us for fobs. When your keys are shared between a car and a building, one lost set can cause two problems at once. If the apartment door is also a concern, our page on apartment lockouts in Mission Hills covers that side of it. For the car, we can meet you in the parking area, confirm the vehicle, and program a replacement on the spot where the vehicle allows it.
Along the Devonshire Street corridor and the Rinaldi Street corridor, cars are parked at businesses, townhomes, and curbs rather than in a private garage, so a lost or stolen fob usually means a car that is stuck wherever it happens to be. Near the Mission district around San Fernando Mission, visitors and staff sometimes lose a fob during a long day and need help before they can drive home. Near Brand Park, a fob can slip out of a pocket on a walk and go missing for good.
Hot summers in the north valley are also hard on electronics. A fob left on a dashboard or in a sun-baked car can wear its battery and case faster, and a swollen or cracked case is a common reason we are asked to replace a fob that technically still works. Although this is only a general caution, it is a reasonable habit in Mission Hills to keep your fob out of direct sun.
Our storefront is in Westwood, roughly 17 miles from Mission Hills, and our mobile vans cover the area. If you can, call before driving anywhere with a dead fob, since in many cases we can come to you.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366What should you ask any locksmith before they touch your car?
California requires locksmith companies to hold a license from the Bureau of Security and Investigative Services, known as a BSIS LCO license. Ask any locksmith you are thinking of hiring for their license number, and check it before work begins. You are entitled to ask, and a legitimate company will not mind.
Also ask whether the person who answers the phone is the person who will arrive, whether the quote reflects your actual vehicle, and what happens if the fob cannot be programmed. Our license number is being added to this site, and until it appears here you are welcome to ask us about it directly when you call.
Be wary of anyone who wants to start work without checking that you own the vehicle. That is a sign they are not careful about who they give keys to.
How can you make a replacement fob last longer?
After we finish, a few habits can save you a second call. Replace the coin battery when the car starts warning you or when the range shrinks, rather than waiting for it to die. Keep a spare fob somewhere safe, outside the car and away from your main keys, since a spare in the same bag is lost along with the original.
Avoid keeping a proximity key next to your phone or a bunch of other metal keys in a tight pocket, where it takes more wear. Do not use the emergency blade as an everyday key, because it is only meant as a backup. If a fob starts failing intermittently, get it looked at early, because a fob that works only some of the time often fails fully at the worst moment.
Frequently asked questions
Can you program a key fob at my home or workplace in Mission Hills?
In most cases, yes. Our mobile vans come to you, whether that is a driveway, an apartment lot, or a parking space near work. Whether the job can be completed on site depends on the vehicle, and we confirm that by VIN or in person. If a vehicle is one that only the dealer can handle, we will tell you at the start.
How do I replace a push-to-start key fob if I lost the only one?
It is more involved than copying an existing fob, but it is work we handle. With no working key, a new smart key is generally created from the vehicle's identification information and programmed directly to the car. Call us with the year, make, and model, and we will explain what is possible for your vehicle.
Do I need to prove I own the car?
Yes. Expect to show ID and documentation such as registration or title. This protects you as much as it protects us. A locksmith who skips this step is not being careful about whose car they are programming keys for.
Is it cheaper to replace a fob with a locksmith or a dealer?
It depends on the vehicle and the situation. A locksmith can often come to you and avoid towing, which can make the overall job the more economical route. But for some vehicles the dealer is the only option. We will tell you plainly which applies, and we do not quote a number until we know your vehicle.
Can you just replace the battery or the case instead of the whole fob?
Sometimes. If the electronics still work and the issue is a dead battery, worn buttons, or a cracked shell, a battery swap or a case transfer may be all you need. That is often the lighter-cost fix. Bring the fob in or describe the symptoms, and we will tell you whether it is worth keeping.
Will my old lost fob still start the car after you program a new one?
On many vehicles, programming can be set up so that previously registered keys are removed from the car's memory, which helps if a fob was lost or stolen. This varies by vehicle, so ask us when you call and we will tell you what is possible for yours.
How long does key fob programming take?
It varies by vehicle and by whether you have a working key to start from. Some jobs are quick, and all-keys-lost jobs take longer. We will give you a realistic expectation on the phone and again when we arrive instead of an overly optimistic promise.
Do you also make the physical key blade for push-button start cars?
Yes, where the fob includes an emergency blade, we can cut it as part of the job. The blade is a backup for when the fob battery is dead or the car cannot detect the fob, so it is worth having cut correctly.
What should I do right now if my fob is lost?
Check the last places you used the car, then call us at (213) 577-1366 so we can talk through your options. If you think the fob was stolen along with something that shows your address, mention that, because we can discuss removing the lost fob from the car's memory after programming a new one.
More locksmith help in Mission Hills
Key Fob Replacement near Mission Hills
Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.
Last updated 2026-10-11.