Home › Key Fob by VIN: How to Find the Right Replacement

Key Fob by VIN: How to Find the Right Replacement

Your VIN tells you exactly which car you have. It does not contain your key's FCC ID or part number, but it is the fastest way to narrow the search to the right fob. This guide shows the full path from VIN to the fob that fits.

What a VIN gives you, and what it does not

A Vehicle Identification Number is a 17-character code assigned to one vehicle. Decoded, it returns the model year, make, model, body style, engine and plant. It does not contain a key code, a transponder ID or an FCC ID. Those belong to the key, not to the car.

That still makes the VIN the right first step. It removes guesswork about the exact vehicle, including cases where the same model was sold with a push-button smart key on one trim and a flip key on another.

Step 1: Decode the VIN

Enter your VIN in the VIN Key Finder. It decodes your vehicle with the NHTSA decoder, then shows in-stock replacement keys and fobs from UrbanX that match the decoded year, make and model. If you do not know where the VIN is, see where to find your VIN.

Step 2: Identify what kind of key you have

Look at your current key. The fob type decides what you need to buy:

• Smart key (proximity fob): you push a button to start the engine. There may be a hidden emergency blade inside.
• Remote head key or flip key: a metal blade with built-in lock/unlock buttons.
• Transponder key: a plain-looking key with a chip in the plastic head and no buttons.

Our guide to transponder keys versus smart keys explains how to tell them apart in a minute.

Step 3: Read the FCC ID and part number off your current fob

The FCC ID is usually on the back of the fob or under the battery cover. It looks like HYQ14FBA, M3N-A2C31243300 or KR5V2X. Write down any other numbers printed next to it, including a longer part number if present. The article how to find an FCC ID covers the details, including what to do if the print has worn off.

Step 4: Match four things before you buy

1. FCC ID: must match your original (or be listed as compatible by the seller).
2. Part number: match it when your fob shows one.
3. Button layout: lock, unlock, trunk, panic, remote start and so on.
4. Key type: smart key versus remote head key versus transponder.

If the seller's listing shows your vehicle's year, make and model and the same FCC ID, you are in good shape.

Step 5: Plan for cutting and programming

A new fob usually does not work out of the box. Most need the emergency blade cut (if it has one) and the electronics programmed to the vehicle, which is done by a locksmith, a dealer or, on some older models, by an onboard procedure. Read what car key replacement costs to compare the options, and can you get a key code from a VIN if you need a cut key and have no original.

Common mistakes

• Buying by model name only. Different trims and build dates can use different fobs.
• Ignoring the frequency. A fob on the wrong radio frequency will not talk to the car.
• Buying a used OEM fob that is locked to another vehicle. Some cannot be reused.
• Forgetting that every programmed key adds to the car's key list. Ask your locksmith about adding a spare while the car is there.

Frequently asked questions

Related guides

• Can You Get a Car Key Made From a VIN Number?
• VIN to Key Code: Can You Get a Key Code From a VIN?
• How to Find Your Car Key's FCC ID
• Transponder vs Smart Key vs Remote Key: Which Do You Have?
• Lost All Your Car Keys? Here Is the Fix
• FCC ID lookup: see which vehicles use your key