2016 Subaru Crosstrek — Key Fob Programming

Quick reference

Step-by-step on-board programming

There is no DIY on-board programming procedure for the 2016 Subaru Crosstrek. Subaru moved remote/key registration to the body/immobilizer control modules that require a diagnostic scan tool (Subaru Select Monitor or a capable locksmith tool). This is true for both standard keyed-ignition remotes and proximity (push‑button start) fobs.

What a dealer/locksmith will do (overview):

1. Verify parts: Confirm the fob matches your VIN/trim and is a new, unlockable unit. For keyed systems, confirm the transponder chip type matches the vehicle.
2. Cut the key: Cut the metal key blade (or the emergency insert key for proximity systems) to your key code or by cloning an existing key.
3. Connect scan tool: Hook up the SSM (or equivalent) to the OBD-II port and enter immobilizer/remote registration mode.
4. Register remotes/fobs: Add the new fob’s transmitter ID(s). Most Subaru procedures erase and re-learn, so all working remotes must be present.
5. Program immobilizer: For keyed ignitions, register the transponder to the immobilizer; for proximity, pair the smart key to the vehicle.
6. Test: Verify lock/unlock, panic, trunk (if equipped), and starting (or push‑button start with brake pressed). Confirm the immobilizer light behavior is normal.

Prep tips for a smooth appointment:

• Bring all existing keys/fobs. Absent remotes can be dropped from memory during programming.
• Have proof of ownership and a photo ID; immobilizer access is security‑restricted.
• If buying your own fob, ensure it is new/virgin. Used Subaru proximity fobs are often not re‑usable.

Battery replacement

Because the 2016 Crosstrek was offered with both a standard remote and, on some trims, a proximity smart key, check which style you have.

Standard 3‑button remote (typical battery: CR1620; verify yours):

1. Remove the small screw on the back (if present). Some cases are snap‑fit only.
2. Pry the seam gently with a plastic pry tool or coin; separate the halves.
3. Lift the board/retainer to expose the coin cell. Note the polarity.
4. Swap in a fresh cell of the same type, positive side as marked.
5. Reassemble, ensuring the rubber button pad is seated. Test functions.

Proximity smart key (typical battery: CR2032; verify yours):

1. Slide the release and pull out the emergency key blade.
2. Insert a coin into the case notch and twist to split the shell.
3. Pop out the coin cell. Observe polarity.
4. Install a new CR2032 of equal specification.
5. Snap the case closed and reinsert the key blade. Test lock/unlock and starting.

Tip: Weak fob batteries can cause reduced range or intermittent operation but do not require reprogramming after replacement.

Where to buy a replacement fob

• Dealer (OEM): Best for guaranteed compatibility and brand‑new, unlockable electronics. Expect roughly $180–$420 for the fob, plus $90–$160 for cutting/programming.
• Automotive locksmith: Often less than dealer pricing with mobile service. Expect $140–$300 for the fob and $80–$150 for cutting/programming, depending on style (standard vs proximity).
• Online (Amazon/eBay/parts sites): Lowest part cost if you know exactly what you need. About $40–$120 for standard remotes; $80–$180 for proximity fobs. You’ll still pay a locksmith for cutting/programming. Ensure the listing says new/virgin and specifically fits 2016 Crosstrek by VIN/trim.

Important: For Subaru proximity systems, used fobs are frequently locked to the original vehicle and cannot be reused. Standard remotes may also be incompatible if FCC ID and internals do not match. Always match by FCC ID and OEM part number from your existing fob or a dealer lookup.

If on-board programming isn’t supported

• Why: The 2016 Crosstrek’s body and immobilizer modules require security access via a scan tool to register remote transmitters and keys.
• Transponder type: These models typically use an encrypted immobilizer (commonly an ID46/Hitag2‑family transponder for keyed ignitions, or an integrated smart‑key chip on proximity systems). Exact type varies by trim; your locksmith will identify and supply the correct chip/fob.
• Costs: Budget $200–$350 for a cut/programmed standard key + remote, or $300–$600+ for a proximity smart key/fob, depending on part source and your market.
• Time: A prepared locksmith visit usually takes 20–45 minutes; dealer appointments vary.
• Spare strategy: Program at least two keys/fobs to avoid future lockouts and to reduce reprogramming hassle if one is lost.

Find a mobile locksmith or shop on Repairius.