How to Program a Mitsubishi Key Fob (DIY, Dealer, or Locksmith)
Newer Mitsubishi keys, including F.A.S.T.-key smart fobs, are registered through the OBD2 port with Mitsubishi’s MUT-III software or a locksmith programmer and the vehicle’s security PIN. Some older Mitsubishi remotes used an onboard procedure that involved grounding a terminal on the diagnostic connector. Expect about $150 to $400 including the key.
Mitsubishi’s US lineup is smaller today than it was in the 1990s and 2000s, but the brand has gone through the same key evolution as everyone else: separate remotes, remote head keys, and the F.A.S.T.-key (Mitsubishi’s name for its keyless operation system). Each needs a different approach.
Mitsubishi Key Types by Era
Year ranges are approximate.
| Key type | Example models and years | How it is programmed | Owner DIY? |
|---|---|---|---|
| Separate keyless-entry remote (+ transponder key on later cars) | Mid-1990s to mid-2000s: Galant, Eclipse, Montero (including Gen 3, 2001 to 2006), Lancer, Endeavor | Remote: onboard procedure on some models; key chip: MUT or locksmith tool | Sometimes, remote only |
| Remote head key | Roughly 2007 to 2010s on turn-key trims: Lancer, Outlander, Outlander Sport, Mirage | MUT-III or locksmith tool with PIN | No |
| F.A.S.T.-key smart fob | Outlander (about 2007 on, upper trims), Outlander Sport, Eclipse Cross, newer Outlander | MUT-III or locksmith tool with PIN | No |
| Phone-based features | Newer Outlander and Outlander PHEV with Mitsubishi Connect | App-based remote functions; not a replacement for a fob | App setup only |
Can You Program a Mitsubishi Key Fob Yourself?
On some older models, the remote can be added at home. A procedure documented for several 1990s and early-2000s Mitsubishis puts the keyless-entry system into programming mode by connecting the diagnostic-control terminal of the data link connector (the OBD port) to ground with a jumper wire, then pressing the remote button in a set sequence with the key in the ignition. The terminal, timing and button sequence vary by model, so use the service manual for your exact car rather than a generic video. Grounding the wrong pin can cause problems, so if you are not comfortable working on the connector, leave it to a shop.
That procedure only pairs the remote. If your key has a transponder chip (most Mitsubishis from the mid-2000s on do), a new key still needs to be registered with a tool and PIN before it will start the engine.
For remote head keys and F.A.S.T.-keys there is no owner procedure. A dealer or locksmith must register them.
What You Need
- The correct key: match the FCC ID and part number from your current key. Outlander and Outlander Sport fobs vary by year and trim.
- A new fob. Smart keys usually cannot be reused after registration to another car.
- The security PIN. Mitsubishi key registration requires a PIN tied to the vehicle. Dealers obtain it by VIN; locksmiths obtain it through a registered service or their tool where supported.
- All existing keys, as registration on many models rewrites the key list.
- Ownership documents.
Mitsubishi Replacement Key Fob or Smart Key
Confirm FCC ID, part number and button layout against your old key, and check that the listing fits your model year and trim.
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How Mitsubishi Key Programming Works
- Identify the key by VIN.
- Cut the blade or emergency blade to the VIN key code.
- Connect MUT-III or a locksmith tool to the OBD2 port.
- Enter the PIN to gain security access.
- Register each key or F.A.S.T.-key as prompted. Smart keys are commonly held near the start button or placed in a specified location.
- Test remote buttons, keyless entry, and engine start with every key.
Our programming a key fob with OBD2 guide explains how these tools work.
Mitsubishi Key Fob Programming by Model
Mitsubishi Outlander key fob programming
The Outlander has used remote head keys on base trims and F.A.S.T.-keys on higher trims since roughly the 2007 model year. A 2014 Outlander and a 2018 Outlander both require a tool and PIN for either key type. The 2022+ Outlander uses a smart key on most trims.
Gen 3 Mitsubishi Montero key fob programming
The third-generation Montero (sold in the US roughly 2001 to 2006) uses a separate keyless-entry remote. Some owners program remotes with the diagnostic-connector grounding procedure from the service manual. If the key itself is new, the immobilizer chip still needs a tool.
Mitsubishi L200 key fob programming
The L200 (also called Triton) is not sold in the US. Its key programming follows the same principles: a tool and PIN for transponder keys and smart keys. Owners outside the US should check local dealer or locksmith support.
Mitsubishi Key Fob Programming Cost
| Option | Typical 2026 US cost |
|---|---|
| Older separate remote, owner-programmed | Remote cost only |
| Remote head key, locksmith | About $150 to $280 |
| F.A.S.T.-key, locksmith | About $200 to $350 |
| F.A.S.T.-key, dealer | About $250 to $400 |
See the key fob programming cost guide for more.
If It Doesn’t Work
- Remote works, engine won’t start: transponder not registered.
- Smart key not detected: weak battery. Mitsubishi F.A.S.T.-keys commonly use a CR2032, but check yours with the Mitsubishi key fob battery replacement guide.
- Programming fails: wrong PIN, wrong part, or a used fob.
Our why won’t my key fob program guide covers more causes. If you have no working key at all, see programming a key fob without a key. For every brand, see the key fob programming hub.
Checklist Before You Book
- Identify your key type. A separate remote, a remote head key, and a F.A.S.T.-key are handled differently and priced differently.
- Bring every key so they can all be registered together.
- Ask who supplies the PIN. Some locksmiths charge extra to obtain it; a dealer can provide it by VIN with proof of ownership.
- Charge the 12V battery before the visit to avoid a failed session.
- Consider a shell. If your key works but the case is broken, a replacement shell avoids programming.
Frequently Asked Questions
On some older models with a separate remote, yes, using a service-manual procedure. Remote head keys and F.A.S.T.-keys need MUT-III or a locksmith tool with the vehicle PIN.
Mitsubishi’s keyless operation system. The fob lets you lock, unlock and start the vehicle without inserting a key.
Typically about $150 to $400 including the key, depending on whether it is a remote head key or a F.A.S.T.-key and who programs it.
Yes, for transponder keys and smart keys. Dealers obtain it by VIN, and locksmiths use a registered service or their tool.
It can on many models. Bring every key you want to keep so they are registered in the same session.