What actually happens when a key fob stops working?
A key fob usually fails in one of a few ways, and the way it fails tells us a lot about the fix. Sometimes the buttons stop responding but the car still starts. Sometimes the car does not recognize the fob at all, and you get a dashboard message about no key detected. Sometimes the fob is simply gone: dropped at work, left in a bag, or lost somewhere between a parking lot and home.
A dead battery is the most common cause, and it is also the one you can check yourself before calling anyone. If the fob worked yesterday, has a visible light that is now dim or dark, and the buttons feel normal, try a fresh battery first. If that does not bring it back, or if the fob is cracked, water-damaged, or has been through the wash, you are probably looking at a replacement.
The harder situation is when the fob is lost and it was your only one. That changes the job, because the car's computer has to be taught a brand-new key and, depending on the vehicle, the old one may need to be removed from the system. We handle that, and we explain it before we start. If you have never had a second key made, this is the moment people wish they had.
What kinds of fobs do we replace and program?
Most people use the word fob for several different things, and the type matters for how the job goes. Here is how we sort them when someone calls.
- Basic remote fobs: a separate remote with lock, unlock and trunk or panic buttons, used alongside a regular metal key. These are often the simplest and lighter-cost replacement.
- Remote head keys and flip keys: a metal blade built into the fob case. The blade has to be cut, and the electronics usually have to be programmed to the car.
- Proximity keys and smart car keys: the fob stays in your pocket and the car unlocks when you touch the handle. This is the kind used for push to start key replacement.
- Push button start fobs with an emergency blade: a smart fob that hides a small mechanical key inside, used if the fob battery dies or the door lock needs to be turned by hand.
Which cars can we program, and when is the dealer the only route?
We do not make blanket promises about every make and model, because the honest answer depends on the car. Some vehicles accept a new fob that we can program on site with our own equipment. Some need information that only the manufacturer releases in certain cases, and a small number of vehicles are dealer-only for certain key types. When that is the case, we will tell you plainly instead of taking your time and leaving you with nothing.
The fastest way to settle it is the VIN, the vehicle identification number printed on the lower corner of the windshield on the driver's side and on the door jamb sticker. With the VIN, the year, make and model, we can tell you what the car needs and whether we can do it. If the information is unclear or conflicting, we confirm it in person with the car in front of us rather than guess over the phone.
For the technical side of chip keys that are not full fobs, see our page on transponder key programming. If your key is a plain metal key with no chip, a copy is a different and simpler job, covered under key duplication.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366How do we replace and program a key fob, step by step?
Because we are a mobile service, the work happens where your car is. The sequence below is what a typical visit looks like, though a particular vehicle may change a step or two.
- You call (213) 577-1366 and tell us the year, make and model, where the car is parked, and what happened to the fob. If you can read us the VIN, that speeds things up.
- We tell you what type of fob the car uses, whether it is something we can do at the vehicle, and what will influence the cost. You decide before we head out.
- We arrive with the van, and we ask for proof that the car is yours, such as registration or ID that matches. We do this for every vehicle, because we will not make keys for a car without confirming ownership.
- If the fob has a metal blade, we cut it to match the car's lock, using the vehicle's code or by working from the existing lock when needed.
- We connect our programming equipment to the car and teach it the new fob. On many vehicles, we also clear lost fobs out of the car's memory so a missing key can no longer start it.
- We test everything with you: lock, unlock, trunk, panic, remote start if equipped, and starting the engine with the push button or the ignition. We do not leave until each function has been checked in front of you.
- If you only have one fob, we talk through making a spare while the equipment is already connected, since that is usually the easier time to add one.
What affects the cost of key fob replacement?
We do not quote numbers on a web page, because the same phrase, key fob replacement, covers jobs that vary widely. What we can do is tell you exactly what moves the cost up or down, so that a phone quote makes sense when you get one.
The biggest factor is the type of fob. A basic remote is usually the more economical route, while a proximity smart key with an emergency blade and encrypted electronics costs more to supply and more time to program. The make, model and year come next, since some manufacturers make keys that are expensive or limited in supply.
Whether you have a working key already matters a great deal. Adding a spare when one key still works is often simpler than starting from nothing after every key is lost, because the car can hand over information that is otherwise harder to obtain. A lost-all-keys job may involve extra steps, and we handle it under our lost car key replacement service.
Other factors are the time of day, how far we travel, and whether the key blade needs cutting. An aftermarket fob can be lighter-cost than an original-manufacturer one, but not every car accepts one reliably, and we will tell you honestly if we think it is a poor fit. The one consistent thing is that we give you the number before work starts, not after.
Locked out or need a locksmith now?
We answer around the clock, every day of the year.
Call (213) 577-1366Should you replace a fob or just keep a spare?
If you only have one working fob, getting a spare is the best money you can spend on that car. The reason is simple: the cost and hassle of losing your only key is far higher than adding a second one while you still have a working fob to copy from. Many people only find this out when they are stuck.
If your fob is damaged but still works, we can often program a new one before the old one dies completely. If the buttons wear out but the chip inside still starts the car, sometimes a replacement shell is enough, which is the lighter-cost fix. We will check before suggesting a whole new fob.
Also consider the battery. A fob that gets weak responses at the door often just needs a battery, and changing one takes a couple of minutes if you know the case type. If we are already there, we can check that for you, but we will not sell you a new fob when a battery is all it needs.
If the problem is not the fob but the car, such as a key that goes in but will not turn or an ignition that feels loose, then the fob is not the culprit. That is a job for ignition repair, and we will tell you which one we are looking at.
Key fob replacement around Irwindale: where we get the calls
Irwindale is a different kind of city for car keys. The residential part is small, a few enclaves of modest single-family homes near the Civic Center along Arrow Highway and Irwindale Avenue, and the rest is mostly quarries, warehouses and manufacturing plants. That means a lot of the vehicles we see belong to people who commute in: plant workers, drivers, and people who work along the Arrow Highway corridor and the Live Oak Avenue industrial district. A fob that dies on a work shift means a car stuck in a company lot.
We also get fob calls at the Irwindale A Line park-and-ride. It is a natural place for a key problem: you park, take the train, and come back to find the fob has quit or you realize it never made it back into your bag. In that case, call us from the parking lot with your plate and VIN details handy, and we come to the car instead of you arranging a tow.
Another place is the Santa Fe Dam area. People spend hours at the Santa Fe Dam Recreation Area, in the heat and dust, and a fob that goes through that can end up with a dead battery or lost entirely. If the key is locked inside the car, that is a car lockout first, then a fob job if needed.
Hot inland-valley summers are hard on electronics, and a fob left on a dashboard is more likely to fail. Dust from quarry operations can find its way into pockets, key rings and the emergency blade slot on a smart fob. If your fob has been sticky or unreliable, a clean-out and new battery sometimes solves it, and we check for that before talking about replacement.
We serve both ZIP codes in the city, 91706 and 91702. We are about 32 miles from our Westwood storefront at 10740 Wilshire Blvd, so we are straightforward about travel as a factor when we give you a quote. For more about how we work in the city, see our mobile locksmith page.
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 key work has changed a great deal in that time. The principle has not: tell people what the job is, do it right, and leave them with a key that works.
When you call (213) 577-1366, you reach us directly at any hour, every day of the year. We are one company, with a storefront in Westwood and our own mobile service vans, so there is no dispatch middleman passing your job to whoever is free. The person who quotes the job is part of the company that does it.
David, the owner and lead technician, oversees how we do automotive key work. That matters for fob jobs, because they are the ones where a rushed technician can create problems, like programming a key but leaving a lost one still active in the car. We would rather take the extra step.
If your question is wider than a fob, such as a key that will not work for other reasons, take a look at our automotive locksmith page for the other things we handle on vehicles. For a closer look at ordinary key replacement without the remote function, see car key replacement.
How to check 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 call for that license number, and check it with the state if you want to be sure. It is a fair question, and a reputable company will not mind it.
A few other things are worth asking. Will they quote the type of fob and what drives the cost before they come out? Will they ask for proof you own the car? Will they test every function before leaving? Will they remove lost fobs from the car's memory? If a company will not answer these, call someone else.
Be wary of a quote that sounds too low on the phone and grows once the technician arrives. The way to avoid it is to ask what is included, what is not, and what might change the number. We work the same way, and we are glad to explain our reasoning.
What to have ready when you call
A few details speed everything up. You do not need all of them, but the more you have, the sooner we can give you a clear answer on whether the job is a quick one.
- Year, make and model of the car, and the trim if you know it.
- The VIN, from the windshield corner or the door jamb sticker.
- Whether you have any working key at all, or whether every key is gone.
- Whether the car has a push button start or a regular ignition slot.
- Where the car is parked, and whether it is on private property, at work or on the street.
- Your registration and photo ID, matching the vehicle, ready to show on arrival.
Frequently asked questions
Can you replace a key fob at my car in Irwindale, or do I have to bring it in?
We come to you. Our mobile vans carry the programming equipment, so most jobs happen at your car, whether that is at home near the Civic Center, at a work lot, or at the A Line park-and-ride. If a particular vehicle needs something that only the dealer can do, we tell you before we make the trip.
I lost my only key fob. Can you still make a new one?
In many cases, yes. A lost-all-keys job takes more steps than adding a spare, but it is something we do regularly. Whether we can do it on site depends on the vehicle, which we confirm using the VIN and proof of ownership. Some makes and models may be dealer-only, and we will say so honestly.
Is key fob programming something I can do myself?
On some older vehicles, there are owner procedures for pairing a simple remote, and if yours has one, it is worth trying. Most newer fobs and all smart keys need equipment that talks to the car's computer. Buying an unprogrammed fob online is a common way to end up with a key that will not work, so check compatibility before you buy.
Do you replace push to start and proximity keys?
Yes, where the vehicle allows it. Push button start and proximity fobs are among the most common jobs we do, and we confirm what your specific car needs by VIN. Some are straightforward, and others require extra steps or are limited to dealers. We tell you which it is before we begin.
What is the difference between a transponder key and a key fob?
A transponder key has a chip that lets the engine start, but it may have no remote buttons. A key fob adds remote functions, and a smart fob can replace the metal key entirely. Many keys combine both. Our transponder key programming page covers the chip-only side in more detail.
Will my old fob still work after you program a new one?
It depends on the car and the job. On many vehicles, we can erase lost fobs from the system so they no longer start the car, which is what you want if a key was stolen or misplaced. If your old fob still works and you want to keep it, tell us and we will program the new one alongside it.
How much will it cost to replace my key fob?
We do not post prices, because the cost depends on the fob type, the make and model, whether you have a working key, and how far we travel. Call (213) 577-1366 with your vehicle details and we explain the factors and give you the number before any work begins.
What if my fob is just not working, and I do not know why?
Start with the battery, since that is the cause more often than people expect. If a new battery does not help, try the spare fob if you have one. If the spare works and the main one does not, the main fob is the issue. If neither works, the car may have a problem, and we can check which it is.
Do you work at night and on weekends in Irwindale?
Yes. Our phone is answered 24 hours a day, 7 days a week, year-round at (213) 577-1366. If you are stuck at a plant shift change or after dark at the park-and-ride, call and we will tell you what we can do. For wider after-hours help, see our 24-hour locksmith page.
More locksmith help in Irwindale
Key Fob Replacement near Irwindale
Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.
Last updated 2026-10-11.
