Question 1

Do you use OEM or aftermarket keys on Infiniti vehicles?

Accepted Answer

We use professional-grade intelligent key units built to factory spec for this application, meaning the correct transponder, the correct button count, the correct blade profile, and a housing that holds up. The dealer part number for the 2005 G35 fob is out there, and quality aftermarket units are built to match it closely enough that programming goes clean and the electronics hold long-term.

What we do not use is the low-cost fobs that flood online marketplaces. On Nissan and Infiniti platforms specifically, locksmiths have documented cases where those units carry incomplete or mismatched internal electronics, and they either fail to program at all or register fine and then drop out after a few weeks. The cost savings evaporate fast when you need a second visit. We carry keys we have tested on this generation and stand behind the result.

Question 2

How long will the replacement key last?

Accepted Answer

A properly programmed intelligent key on this generation of G35 should give you years of reliable use under normal conditions. The electronics inside are durable. What actually wears out first on these fobs is the plastic housing, specifically around the key ring attachment point and along the seam where the emergency blade sits. That part of the design sees real mechanical stress every day.

The good news is that if the shell cracks or breaks, the internal board and transponder can often be transferred into a fresh housing without going through the full programming sequence again, as long as the electronics are undamaged. Change the CR2032 on a regular schedule and avoid prying the case open with anything sharp, and the fob itself should outlast a couple of battery replacements easily.

Question 3

What if the new key stops working after a few weeks?

Accepted Answer

Call us. We come back.

Every key we deliver gets tested before we leave: door handle unlock, start function, all remote buttons, emergency blade in the cylinder. If something fails under normal use after that, we fix or replace it. That is not a negotiation. G35 owners on forums describe keys that were programmed with the wrong equipment and lost their registration within weeks, requiring a return dealer visit and another full programming charge. We use the right tools for this platform and we warranty what we do.

Question 4

I have a second key that still works. Can you add a third, or do I need to start over?

Accepted Answer

Good news: if you have a working key in hand, you're in the easier situation. The 2005 G35 intelligent key system supports up to four registered fobs, and adding to an existing registered key is a shorter process than an all-keys-lost job. You don't need the full security reset sequence, which saves time.

All-keys-lost is a different story. That process requires wiping the existing key memory entirely and re-registering from scratch through the diagnostic port. It takes longer because of the built-in timed sequence the system runs during security access, and it means any fob you're not physically handing to the tech gets permanently erased from the vehicle. Hold onto every working key you have. Even a worn backup is worth keeping registered.

Question 5

The door handle touch unlock stopped working but the start button still recognizes the key. What is going on?

Accepted Answer

This is a known complaint pattern on this generation. The intelligent key system uses separate antennas for the door handles and for the ignition area, and they can fail independently. If the start button still sees the fob but one or both door handles stopped responding to touch, the fob itself is almost certainly not the problem.

What to check first: wipe down the exterior of the door handle area. Dirt and moisture around the capacitive sensor can cause false negatives. If it stays dead after that, you're likely looking at the handle antenna, a wiring issue at that door, or a connector that has corroded. This is not a key replacement job. It's a diagnostics job on the door circuit. We can sort that out on site without you moving the car.

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