What a replacement key fob is and where to get one
A key fob is the small remote that locks and unlocks your car doors and sometimes opens the trunk. When yours stops working or breaks, you have three main places to get a replacement: the car dealership, a locksmith, or an auto parts store. Each route differs in cost, how long it takes, and what information you need to bring.
The dealership is the most expensive option but guarantees the fob will work with your specific car model. A locksmith can often program a fob faster and cheaper, though not all locksmiths handle every car brand. Auto parts stores sell blank fobs and sometimes program them on-site, but availability depends on your car's year and make.
Before you go anywhere, you will need your car's Vehicle Identification Number (VIN), which appears on your registration, insurance card, or the dashboard on the driver's side. You may also need proof of ownership, like your registration or title.
Key Takeaways
- Dealerships charge the most but may provide compatibility; locksmiths and auto parts stores are cheaper but may not work with all car models.
- You will need your VIN and proof of ownership before visiting any location.
- Dealership replacement typically takes one to three days; locksmiths and auto parts stores often complete the work the same day.
- Some fobs can be reprogrammed yourself using a button sequence, though this varies by car model and year.
- If your fob is lost rather than broken, tell your dealership so they can deactivate the old one and prevent unauthorized access.
Dealership replacement: cost and timeline
Going to your car's dealership is the straightforward route if you want certainty. The dealership has your car's records and can order or program a fob that matches your exact model and year. Bring your registration, proof of ownership, and your VIN.
Dealership fobs usually cost between $200 and $500, depending on your car brand and whether the fob has advanced features like remote start. Some dealerships charge an additional programming fee of $50 to $100. The work typically takes one to three business days, though some dealerships can do it faster if they have the fob in stock.
Call ahead before you visit. Ask whether they have the fob in stock and what the total cost will be, including programming. If your car is still under warranty, check whether fob replacement is covered — some warranties include this, though most do not.
Locksmith replacement: faster and often cheaper
A locksmith who specializes in automotive work can often replace your fob the same day for $100 to $300, depending on your car model and the locksmith's location. Locksmiths typically charge less than dealerships because they buy fobs in bulk and program them using universal equipment.
Not all locksmiths work on all car brands. Before you call, have your car's year, make, and model ready. Ask the locksmith whether they have worked on your specific car before and whether they can do the work same-day. Some locksmiths work mobile and will come to your home or workplace.
Bring your VIN and proof of ownership. If your fob is lost rather than broken, ask the locksmith whether they can contact your dealership to deactivate the old fob — some can, some cannot. If they cannot, you may need to call the dealership yourself to report the lost fob.
Auto parts store replacement: the budget option
Stores like AutoZone, O'Reilly Auto Parts, and NAPA sell replacement fobs and sometimes program them in-store. Blank fobs cost $15 to $50, and programming usually adds another $50 to $150 if the store offers it. Total cost is often $75 to $200, making this the cheapest option.
The catch is availability. Not every store stocks fobs for every car model, and not every store has the equipment to program fobs. Call ahead and ask whether they have your car's fob in stock and whether they can program it. Some stores will order a fob for you, which takes several days.
If the store programs the fob on-site, the work usually takes 30 minutes to an hour. Bring your VIN, proof of ownership, and your car keys. Some stores require you to bring the car itself so they can test the fob before you leave.
DIY reprogramming: when it works and when it does not
Some cars allow you to reprogram an existing fob yourself using a button sequence — no locksmith or dealership needed. This works only if you already have a working fob and your car model supports it. The process usually involves turning the ignition on and off a certain number of times while holding buttons on the fob.
This method works for many Ford, GM, Chrysler, and Honda vehicles made between the 1990s and early 2010s, but not for newer cars or luxury brands. Search online for your specific car's year, make, and model plus "reprogram fob yourself" to see if instructions exist. If you find a guide, follow it exactly — the timing and button sequence must be precise.
If the reprogramming does not work after three attempts, stop and take the fob to a locksmith or dealership. Repeated failed attempts can sometimes lock the car's system temporarily.
What to do if your fob is lost instead of broken
If your fob is lost rather than broken, contact your dealership and report it. Ask them to deactivate the old fob so no one else can use it to unlock your car. This is especially important if you lost the fob in a public place. Deactivation usually takes a few minutes and costs nothing.
After the old fob is deactivated, you can order a replacement through any of the three routes — dealership, locksmith, or auto parts store. The new fob will not work until it is programmed to your car, so there is no security risk while you are waiting for the replacement to arrive.
If you cannot reach your dealership when ready, you can still order a replacement fob. Just make sure to call the dealership within a day or two to report the lost fob and have it deactivated.
Cost comparison and timeline at a glance
| Route | Typical Cost | Timeline | Best For |
|---|---|---|---|
| Dealership | $200–$500 | 1–3 business days | Certainty and warranty coverage |
| Locksmith | $100–$300 | Same day (often) | Speed and lower cost |
| Auto parts store | $75–$200 | Same day or several days | Budget-conscious buyers |
| DIY reprogramming | $0 | 15 minutes | Older cars with compatible systems |
Frequently Asked Questions
Can I use a fob from a different car model on my car?
No. Fobs are programmed to match your specific car's security system. A fob from another car will not unlock your doors or start your engine, even if it looks identical. You must use a fob designed for your car's year, make, and model.
How long does it take to program a fob?
Programming itself takes 5 to 15 minutes once you are at the locksmith or dealership. The wait time depends on how busy they are. Auto parts stores and locksmiths often complete the work same-day; dealerships usually take 1 to 3 business days because they may need to order the fob first.
What if I have multiple fobs and only one stopped working?
You can replace just the broken one. The new fob will work alongside your existing fobs once it is programmed. You do not need to reprogram or replace the working fobs.
Will my car insurance cover a replacement fob?
Most car insurance policies do not cover fob replacement because it is considered routine maintenance. Check your policy or call your insurance company to be sure. Some extended warranties or roadside information plans may cover it, but this is rare.
What if the locksmith or auto parts store cannot program my fob?
If they cannot program it, they should tell you before you pay. Ask them to recommend another shop that handles your car model, or contact your dealership. Some newer luxury cars require dealership programming because the security system is more complex.