Remotes and smart keys
Lost, cracked or dead fob? We check the battery first, match the right part to your car, and program it where you are parked. You hear the total price before we drive out.
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Quick answer
Before you replace a key fob, try a fresh battery. If the fob is lost, broken, or still dead with a new battery, key fob replacement in Port St. Lucie means getting a remote with the right FCC ID for your car and programming it on site. We do this for most non-German makes and quote the full price first.
Lock and car brands we work on
The type decides which part we bring and how it gets programmed.
The blade and the lock buttons share one plastic head. Chrysler put these on its 2004 minivans, and by 2010 Chrysler, Dodge and Jeep used them across the line, with three to seven buttons. Ford’s version, the integrated key, arrived for the 2007 model year.
The blade folds into the fob and springs out when you press a button. GM’s first one came on the 2010 Camaro. Like a remote head key, its head holds both the remote and a chip, and both get programmed.
It stays in your pocket or purse. Antennas in the door handles send a low-frequency wake-up signal at about 125 kHz, and the fob answers by radio so the doors open and the start button works. A metal emergency blade is usually hidden inside.
Older setups split the job between a remote that only locks and opens the doors and a key with a chip that starts the car. We can replace either piece on its own.
Because the buttons and the starting chip are two separate systems that happen to share one plastic case. The buttons are a small radio transmitter that runs on the coin battery. The starting chip, the transponder, has no battery at all. The car powers it for a moment each time you start up.
So a fob can stop locking the doors and still start the engine just fine. That usually means a weak battery or a fault inside the remote, not a problem with the car’s security. The reverse, where the buttons work but the car won’t start, points to the chip side, which is a programming question.
Remote fobs and push to start smart keys, programmed where the car sits.
Most smart fobs carry a small metal emergency key inside the case. On some you press a release button and slide it out. On others you pry a cover open. Your owner’s manual shows how yours comes out. Learn it on a calm day, not in a hot parking lot with a dead fob.
That blade is cut for one car. A blade from someone else’s fob won’t turn your lock, even if the electronics end up working. When we replace a smart key, we cut the new fob’s emergency blade to your car.
Run through these before you pay for a new fob. Most take a minute.
Heat. Most fobs run on a 3-volt lithium coin cell, and heat is hard on batteries. Energizer’s spec sheet for the CR2032, one of the most common fob batteries, lists an operating range that tops out at 60°C, which is 140°F.
A closed car gets close to that fast. NBC 6 in Miami tracked a car on a 95-degree day: 114°F inside after 10 minutes, 124°F after 20, and 138°F after an hour. A spare fob left in the car on a summer afternoon can sit near the top of that range for hours.
Under easy conditions a fob battery can last several years, up to about five. Heat and heavy use cut into that. Here is how to stretch it:
The most common problem is the wrong part. Two fobs can look exactly alike and still use different electronics, frequencies or button layouts. The FCC ID is the number that tells them apart. It’s printed on the back of the fob or inside the shell, and the replacement has to match it. Remotes also come in different frequencies, such as 315 MHz and 433.92 MHz, and you can’t tell which one you have by looking.
Your remote also uses a rolling code that changes with every press, so no fob does anything until it has been paired to your car. Used fobs are the next trap, because many are locked to the first car they were paired with:
Call and we will quote the total before we drive out. Sun to Thu 7am to 11pm, Fri 7am to 5pm.
Aftermarket fobs can save money, mostly on older cars. Send us the FCC ID from your old fob and your VIN before you buy, and we'll tell you whether that part matches your car, so you don't pay for one that can't be programmed.
Flip your old fob over, or open it, and read us the FCC ID. If the fob is lost, your VIN is enough for us to look up the right part, and the key lookup page shows what type of key your car came with.
We quote the total for the fob, the emergency blade and the programming before we head out to you, anywhere from Fort Pierce to Jensen Beach.
We check your old fob with a fresh battery at the car. If that brings it back, you don’t need a new one.
The new fob gets paired to your car, and its hidden emergency blade is cut to fit your door lock.
Lock, open, trunk, panic, remote start if you have it, and a push-button start with the fob in your pocket. If a fob was lost, we remove it from the car’s memory where the car allows.
Typical ranges, depending on the key type and your car. Your exact total is quoted on the phone before we drive out.
| Job | Typical range | What is included |
|---|---|---|
| Remote head key, flip key or smart key | $200 to $400 | New fob, emergency blade cut, programmed and tested |
| Chip key without remote buttons | $150 to $275 | For two-piece setups where only the key is missing |
If a fresh coin cell from the store fixes your fob, that's the cheapest repair there is. See how the chip side works on our car key programming page, or check our full price list.
We don't replace or program fobs for BMW, Mercedes-Benz, Audi, Volkswagen, Porsche or Mini. Owners of those brands should go to the franchise dealer or an import specialist. Asian and American brands are what we handle, and the full make list sits on our automotive services page.
Other services
Other locksmith services from the same team, with the same rule: total price on the phone first.
Locked out of a house, car or business. Damage-free entry first, proof of ownership every time.
Deadbolts, knobs, sliders and storm doors fitted and repaired at your home.
New pins so old keys stop working, or new hardware when the lock is worn out.
Keypad and Wi-Fi deadbolts fitted, aligned and set up with your codes.
Storefront and office locks, closers, panic bars and staff change rekeys.
Master key systems, keypads and fob readers for offices and rentals.
FAQ
Watch for range that keeps shrinking, buttons that only work some of the time, or a low key battery message on the dash. Those usually point to the coin cell. Try a fresh one of the same type, such as a CR2032. If the fob still does nothing, or your spare works fine while this one doesn't, the fob itself is the problem.
It depends on the part, so check with us before you buy. It needs the same FCC ID as your original and, on many makes, it has to be new and never programmed. Used fobs for Chrysler, Dodge, Jeep and Toyota are often locked to the first car they were paired with. Send us the FCC ID and your VIN and we'll tell you.
Usually not. Standard auto insurance doesn't cover a key you simply lose. If the key was lost or damaged because the car itself was stolen or caught fire, the part of your policy that covers theft and fire may help. Consumer Reports also suggests checking your warranty and roadside assistance plan, since some include key help. Read your policy or ask your agent to be sure.
Turn the fob over. The FCC ID is usually printed on the back of the case. If it isn't there, look inside the shell when you open it to change the battery. It's a mix of letters and numbers, and a replacement fob has to match it, even if a different fob looks identical.
Hold the fob right against the spot your owner's manual names for a dead fob, then press the start button. The car powers the fob's chip through a coil at that spot, so it can start even with a dead fob battery. To get in, use the metal emergency key hidden inside the fob. Then replace the battery.
A fob's coin cell can last several years, up to about five, under easy conditions. Florida heat, heavy use and leaving the fob in a hot car all shorten that. If you have to stand closer to the car than you used to, change it soon. Storing your spare fob inside the house helps its battery last longer.
On many cars, a lost fob can be removed from the car's memory when we program the new one, which keeps it from starting the engine for whoever picks it up. The metal emergency blade inside it could still open a door, though. If the fob was stolen along with something showing your address, tell us so we can talk through your options.
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Ready when you are
Tell us what happened and where you are in Port St. Lucie and the Treasure Coast. You get the total price on the phone before anyone drives out.
