2015 Honda Accord Key Fob Programming

Quick reference

Step-by-step on-board programming

Unfortunately, the 2015 Honda Accord does not have a user-accessible, on-board (DIY) programming procedure for new key fobs. Unlike older models that might allow for a series of key turns and button presses, all key and remote programming for this generation of Accord must be done using a specialized diagnostic scan tool.

This is for security reasons. Modern vehicle security systems, including the immobilizer, require a secure, encrypted handshake between the key and the vehicle's computer. The tools used by locksmiths and Honda dealerships can access the vehicle's immobilizer system to securely register a new key transponder and remote.

Attempting an on-board procedure found for other Honda models will not work and could potentially cause issues with your vehicle's existing key recognition. You will need to contact a professional.

If on-board programming isn't supported

Since your 2015 Accord requires a scan tool, you have two primary options: a dealership or an automotive locksmith. A mobile locksmith can often provide the same service as a dealer, but at a more convenient location (like your home or office) and often at a lower price.

The process involves a technician connecting a compatible diagnostic tool to your vehicle's OBD-II port (located under the dashboard on the driver's side). The technician will then use the software to:

1. Access the vehicle's immobilizer control unit.
2. Put the system into programming mode.
3. Erase all previously stored keys (a necessary security step).
4. Introduce the new key(s) and program both the immobilizer transponder and the remote lock/unlock functions.
5. Re-program any existing keys you wish to continue using.

Crucially, all keys you want to use for the vehicle must be present during the programming session. Any key not present will be de-authorized and will no longer start the car.

Expect this service to cost between $75 and $150 for programming, in addition to the cost of the key fob itself.

Battery replacement

A common reason for a fob to stop working is a dead battery. This is a simple and inexpensive fix you can do yourself.

1. Locate the screw: On the back of the fob, there is a small Phillips head screw. Use a jewelers screwdriver to remove it.
2. Separate the halves: Carefully pry the two halves of the fob apart. A small flathead screwdriver or the edge of a credit card can be useful here. There's usually a small notch to help you.
3. Remove the old battery: The battery is a CR2032 coin cell. Note the orientation (+ side up or down) before removing it.
4. Install the new battery: Slide the new CR2032 battery into place, ensuring it's oriented correctly.
5. Reassemble: Snap the two halves of the fob back together and replace the screw. Test the buttons to ensure it's working.

Where to buy a replacement fob

• Honda Dealership: This is the most expensive but most straightforward option. You are guaranteed to get a genuine OEM key that is correct for your vehicle. Ballpark Price: $150 - $250+ for the fob, plus programming.
• Automotive Locksmith: Most professional locksmiths offer high-quality OEM or aftermarket fobs. They will verify they are providing the correct part for your VIN. The major advantage is that they can sell, cut, and program the key in a single visit, often for less than the dealer. Ballpark Price: $100 - $200 for the fob and programming.
• Online (Amazon, eBay): You can find many affordable aftermarket fobs online. However, the quality can be inconsistent, and there's a risk of buying a fob that is incorrect or cannot be programmed. You will still need a locksmith or dealer to cut and program the key. While the initial cost is low (often under $50), be aware that some locksmiths may charge a premium to program a key you supply, or they may not guarantee the service if the key you provided fails to program.

Find a mobile locksmith or shop on Repairius.