MechanMagic Replacement Key Fob for Nissan & Infiniti 4-Button — Two-Pack, Pre-Tested with Battery

MechanMagic 4-button replacement key fob is a pre-tested, battery-installed remote programmed by a locksmith or dealer to replace OEM KR55WK48903/KR55WK49622 units for compatible Nissan, Infiniti, and Murano models.

This MechanMagic remote offers a ready-to-program spare or replacement for owners of select Nissan and Infiniti vehicles from the late 2000s to mid‑2010s. Designed to match the OEM button layout and signal type, the fob ships with its internal electronics and battery already installed so a professional can complete vehicle-specific programming quickly. It’s sold in a two-pack for convenient backup or paired‑vehicle use.

Which vehicles and part numbers does this fob fit?

This remote is engineered to match FCC IDs KR55WK48903 and KR55WK49622 and replaces multiple factory part numbers. Check your original fob or owner’s manual to confirm compatibility before purchasing.

• Fits Nissan Altima 2007–2012 and Versa (sedan) 2007–2012
• Compatible with Maxima 2009–2014, Murano 2009–2014 (KR55WK49622 only)
• Works for 370Z 2009–2015 (KR55WK49622 only) and select Infiniti models (EX35, FX35, G25, G35, G37, Q60, QX70)
• Replaces part numbers 285E3-JA05A, 285E3-JA02A, 285E3-JA000, 285E3-JK62A

How is the fob prepared and what’s included in the box?

Each MechanMagic remote is fully inspected and pre-tested using professional tools before shipment to ensure correct electronics and button function. Batteries come pre-installed so the unit is ready for final programming by a qualified technician.

• Two (2) pre-tested keyless entry fobs per order
• Internal battery and electronics already installed
• Quality control testing completed prior to shipping
• No DIY immobilizer programming — requires locksmith/dealer

What steps are required to get the fob working with my car?

This replacement must be programmed to your vehicle by an auto locksmith or dealership; there is no self-programming option. Bring both the vehicle and the new fob to the professional so they can sync the unit to your car’s immobilizer and remote entry system.

• Confirm FCC ID and vehicle compatibility first
• Take the fob and your vehicle to a locksmith or dealer for programming
• Professional will pair the remote to the car’s security system
• Test all four buttons (lock, unlock, trunk, panic) after programming

Who is this for? MechanMagic’s 4-button replacement is ideal for owners of compatible Nissan and Infiniti models who need a reliable spare or wish to replace a lost or damaged OEM fob without buying from a dealer-only source. It’s practical for anyone who prefers a pre-tested unit with a battery already installed, and for households with two vehicles or drivers who want duplicate remotes. Note: buyers should budget for professional programming when adding this remote to their vehicle.