Infiniti M45 Key Fob Programming

Updated 2026 2006–2010 5 model years

The Infiniti M45 key fob has to be programmed by an automotive locksmith or dealer — there is no at-home procedure. Below is the exact replacement fob you need for each model year (FCC ID and part number), the battery it takes, and what programming costs.

Shop Infiniti M45 key fobs on Amazon Match the FCC ID for your year (table below) before you buy.

Every Infiniti M45 model year

Key fob programming method, fob type and battery for each Infiniti M45 model year
Year	Programming	Key fob	Battery
2010	Locksmith or dealer Locksmith or dealer	Proximity Key · 4-button	CR2025 battery on Amazon
2009	Locksmith or dealer Locksmith or dealer	Proximity Key · 4-button	CR2025 battery on Amazon
2008	Locksmith or dealer Locksmith or dealer	Proximity Key · 4-button	CR2025 battery on Amazon
2007	Locksmith or dealer Locksmith or dealer	Proximity Key · 4-button	CR2025 battery on Amazon
2006	Locksmith or dealer Locksmith or dealer	Proximity Key · 4-button	CR2025 battery on Amazon

2006–2010 Infiniti M45

Remote / key fob programming

This remote can't be programmed with a do-it-yourself procedure. The vehicle needs a diagnostic tool connected to its OBD port to pair a new remote, so a replacement has to be set up by an automotive locksmith or a dealer.

Order the correct replacement remote below — match the FCC ID on your current fob first — then have a local automotive locksmith or the dealer program it to your vehicle.

Key programming

This key fob can't be programmed with a do-it-yourself procedure. The vehicle needs a diagnostic tool connected to its OBD port to pair a new fob, so a replacement has to be set up by an automotive locksmith or a dealer.

Order the correct replacement fob below — match the FCC ID on your current fob first — then have a local automotive locksmith or the dealer program it to your vehicle.

Replacement key fob

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Proximity Key

Stays in your pocket — the car unlocks and starts without inserting a key.

4-button Proximity Key

Find on Amazon

FCC ID: CWTWBU618, CWTWBU735
OE part #: 285E3-EH100, 285E3-EH10D, 285E3-EH11A, 285E3-EH12A, 285E3-EW81D, 285E3-EW82D
Frequency: 315 MHz
Chip: PHILIPS ID 46

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

Infiniti M45 key fob battery

Your Infiniti M45 key fob uses a CR2025 3V lithium coin cell. A fresh one typically lasts 3–5 years.

Buy Energizer CR2025 Lithium Coin Batteries (4-pack) on Amazon

How to replace the battery

1 Slide the release latch and pull the metal emergency key out of the fob.
2 Use that key (or a coin) to pry the two halves apart at the seam.
3 Lift out the old coin cell — note which side faces up.
4 Drop in the new battery the same way (printed + side usually faces the back cover).
5 Press the case back together until it clicks, then test lock/unlock and push-to-start.

Battery tips

Use a fresh, name-brand 3V lithium cell — bargain cells drain quickly.
Even with a dead fob battery you can usually still start the car by holding the fob against the start button — check your owner's manual.
If the fob still won't work after a new battery, it may need re-syncing or programming.

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Rather hire a pro?

See what it actually costs, broken out by dealer, locksmith, and DIY:

Key fob programming cost Car key replacement cost