Keyecu Smart Proximity Key Fob for Nissan Sentra Versa Leaf 2013–2018 — 4-Button Unprogrammed Shell

If your original Nissan smart key is lost, damaged or worn, this Keyecu remote offers the same button layout and FCC ID to restore remote locking, unlocking, trunk release and panic features once professionally programmed. It is supplied as a blank, uncut, unprogrammed OEM-style shell with the correct electronics footprint for compatible Nissan models; it does not arrive ready to pair with your vehicle out of the box.

Which Nissan models and years will this Keyecu key fob fit?

This remote is manufactured to replace the factory smart proximity fob used on specific Nissan vehicles. Confirm visual match and FCC ID before purchase to ensure compatibility.

• Compatible models: Nissan Sentra, Versa, Leaf.
• Model years covered: 2013, 2014, 2015, 2016, 2017, 2018 (verify your year exactly).
• Replace FCC ID: CWTWB1U840; IC: 1788D-FWB1U840 — match to the original fob.

How do I get this Keyecu smart key programmed to my car?

This Keyecu item requires professional programming; there is no user-accessible DIY procedure. Plan to visit a qualified locksmith or dealer who can add the new transponder and remote frequency to your vehicle’s system.

• Take the blank fob to a locksmith or dealership for programming.
• Recommended programmers: X100 PAD2, Londor K518, X300 DP, SKP900.
• Bring proof of ownership and the vehicle’s VIN to speed the process.

What should I check before ordering this replacement Keyecu key?

To avoid fitment issues, visually compare the new remote to your existing key and confirm the FCC/part number. This product is sold as a replacement head/remote and may require blade cutting and programming separately.

• Visual match: button layout, case shape and emergency blade slot.
• Verify original FCC ID: CWTWB1U840 matches your current key.
• Confirm a locksmith near you can program this specific blank before purchase.

What arrives in the box and what additional services will I need?

The package contains the Keyecu smart proximity fob shell with internal electronics set for your Nissan’s FCC ID; it does not include blade cutting or vehicle programming. Expect a short additional visit to a locksmith for final setup.

• Included: Keyecu 4-button smart remote (unprogrammed, uncut).
• Not included: blade cutting, vehicle programming, or battery installation service.
• Recommended next steps: cut the key blade and have a locksmith program the fob to your car.

Who is this for: Drivers of Nissan Sentra, Versa or Leaf (2013–2018) who need a like-for-like replacement smart key shell with correct FCC ID and who plan to use a professional locksmith or dealer for blade cutting and programming. Ideal for owners replacing a lost or broken fob, or for shops that supply and program OEM-style keys.