What happens when you lose or break a key fob
A broken or missing key fob means you cannot unlock or start your car remotely, and you may not be able to open it at all if the physical key inside is also lost. You have three main routes: get a replacement from your car's manufacturer, buy an aftermarket fob and program it yourself, or pay a locksmith or dealer to handle it. The cost ranges from under $50 for a basic aftermarket fob you program at home to $300 or more if a dealer does the work, depending on your car's make and model.
The fastest option is not always the cheapest, and the cheapest option is not always the easiest. Your choice depends on how much you want to spend, whether you have time to program a fob yourself, and how much your car's security system complicates the process.
Key Takeaways
- Dealerships can order and program a fob for your specific car, but this usually costs $200 to $400 and takes several days.
- Aftermarket fobs cost $30 to $100 and can be programmed at home using a sequence of button presses or a dealer's programming tool, though not all cars support DIY programming.
- Locksmiths often charge $100 to $200 and can program fobs for many car models, sometimes faster than a dealership.
- You will need your Vehicle Identification Number (VIN) and proof of ownership to order a replacement from most sources.
- Some newer cars with push-button start systems require dealer programming and cannot be programmed at home.
Getting a replacement from your car's dealership
The dealership is the most straightforward route if you want a fob may provide to work with your car. You call the service department, give them your VIN and proof of ownership (your registration or title), and they order the fob and program it to your vehicle. The fob arrives within a few days to a week, and programming usually takes an hour or less once it arrives.
Dealership fobs are genuine parts made for your car's exact security system, so there is no guesswork about compatibility. The downside is cost: expect $200 to $400 total, depending on your car's brand and model. Luxury and newer vehicles cost more. You also have to visit the dealership in person to pick up the fob and have it programmed, which takes time out of your day.
If your car has a push-button start system or a keyless entry system made after 2015, the dealership may be your only option. Many newer cars cannot be programmed at home and require the dealer's specialized equipment.
Buying an aftermarket fob and programming it yourself
An aftermarket fob is a replacement made by a third-party manufacturer, not by your car's brand. You can buy one online or at an auto parts store for $30 to $100, depending on the model and how many buttons it has. The catch is that you have to program it to your car yourself, and not all cars support DIY programming.
To learn about your car can be programmed at home, search your car's year, make, and model plus "DIY key fob programming" or "self-programming key fob." If your car supports it, the process usually involves sitting in the driver's seat, turning the key to the "On" position without starting the engine, and pressing a sequence of buttons on the fob. The exact sequence varies by car. Some cars require you to repeat this cycle several times. If you do it correctly, the car's lights will flash or the door locks will cycle, signaling that the fob is programmed.
This route saves money but requires patience and attention to detail. If you make a mistake in the sequence, the fob will not program and you will have to start over. Some aftermarket fobs are also lower quality than dealer fobs and may stop working after a year or two.
Using a locksmith to program a fob
A locksmith who specializes in automotive work can order and program a fob for you, often faster and cheaper than a dealership. Locksmiths typically charge $100 to $200 total, depending on your car's make and model and how quickly they can get the fob in stock. Many locksmiths can program a fob the same day you call if they have the right equipment and the fob is available.
To find a locksmith, search "automotive locksmith near me" or ask your car insurance company for a referral. Call ahead and ask if they stock fobs for your car's year, make, and model, or if they need to order one. Ask for a price quote before you commit. Some locksmiths charge a flat rate; others charge by the hour plus the cost of the fob itself.
Locksmiths are a good middle ground if you want faster service than a dealership but do not want to program a fob yourself. They have the programming equipment and the informed to handle most car models, though some very new or luxury vehicles may still require a dealership.
What you need before you order a replacement
Regardless of which route you choose, you will need your Vehicle Identification Number (VIN) and proof of ownership. Your VIN is a 17-character code stamped on your car's dashboard (visible through the windshield on the driver's side) and printed on your registration and title. Your proof of ownership is your car's registration or title document.
You should also know your car's year, make, model, and trim level, because some fobs are specific to certain trims. If you have an older car, you may also need to know the original fob's part number, which you can find in your car's manual or by calling the dealership.
If you are ordering from a dealership or locksmith, have this information ready when you call. If you are buying an aftermarket fob online, check the product listing carefully to make sure it is compatible with your car's year and model before you buy.
Programming a fob when you already have one that works
If you have a working fob and want to program a new one to the same car, you may be able to do it without going to a dealership. Some cars allow you to program a new fob by inserting both the old and new fob into the ignition and turning the key to specific positions in a set sequence. The car's lights or locks will signal when the new fob is programmed.
This method works on many older cars and some mid-range vehicles, but not on newer models with push-button start systems. Search your car's year, make, and model plus "program key fob with existing fob" to learn about your car supports this. If it does, the instructions are usually straightforward enough to follow at home.
Costs and timelines at a glance
| Route | Cost Range | Time to Get Fob | Programming Time | Best For |
|---|---|---|---|---|
| Dealership | $200–$400 | 3–7 days | 1 hour | Newer cars, push-button start, may provide compatibility |
| Aftermarket + DIY | $30–$100 | 1–2 days (shipped) | 15–30 minutes | Older cars, budget-conscious, willing to program at home |
| Locksmith | $100–$200 | Same day to 2 days | 30 minutes to 1 hour | Fast service, mid-range cost, most car models |
Frequently Asked Questions
Can I program a fob I bought online myself, or do I need a professional?
It depends on your car. Many older and mid-range vehicles support DIY programming using a button sequence you perform in the driver's seat. Newer cars with push-button start systems usually require a dealership or locksmith with specialized equipment. Search your car's year, make, and model plus "DIY key fob programming" to learn about yours supports it.
What if I lose both my key fob and my physical car key?
You will need to contact a locksmith or dealership and provide proof of ownership. They can make a new physical key and program a new fob to match. This costs more than replacing just a fob—expect $200 to $500 depending on your car—because the locksmith or dealer has to cut a new key and program it to your car's security system.
How long does it take to get a replacement fob from a dealership?
Most dealerships can order a fob within 3 to 7 business days, depending on whether they have it in stock or need to order it from the manufacturer. Once it arrives, programming usually takes an hour or less. Call your dealership's service department to ask about their current wait time.
Is an aftermarket fob as good as a dealer fob?
Aftermarket fobs work fine for most cars and cost much less, but quality varies by brand. Some aftermarket fobs stop working after a year or two, while others last as long as dealer fobs. Read customer reviews before you buy, and choose a brand with good ratings. If durability is important to you, a dealer fob is a safer choice.
Can a locksmith program a fob for any car?
Most locksmiths can program fobs for cars made in the last 10 to 15 years, but very new luxury vehicles or cars with advanced security systems may require a dealership. Call a locksmith and describe your car's year, make, and model. They can tell you whether they can handle it or if you need to go to a dealership.