2005 Nissan 350z
Key Replacement - Save vs Dealer in Ventura County

Q: How much more does all-keys-lost cost compared to just adding a spare?

More. When you still have a working key, adding a spare is a standard registration job. When every key is gone, the immobilizer has to be fully reset before anything new can be enrolled. On the 2005 350z that means connecting through the OBD port, clearing stored key data, and programming fresh. It takes longer, it requires more from the equipment, and it costs more to reflect that.

Q: Do aftermarket keys work on a 2005 Nissan 350z, or should I buy OEM?

Aftermarket keys for this year and model are generally workable, but the quality gap between a good aftermarket shell and a cheap one shows up fast. The remote head key design means the blade, the fob housing, and the transponder all need to be right. A bad contact inside the fob or a blade cut on a soft blank wears down sooner than it should. I carry OEM-spec blanks tested against this application specifically, so there's no guessing on compatibility.

Q: My 350z starts fine but the lock and unlock buttons on the key stopped working. What's going on?

Nine times out of ten on this key, it's the CR1616 battery. The transponder that runs the ignition draws power from the car's own field, so the engine starts even when the battery is completely dead. The remote functions -- lock, unlock, the other buttons -- run off the cell. When the battery drops, remote range goes first, then the buttons stop responding entirely, and because the car still starts, owners assume the fob is fine. It's not.

Q: Can I program a second key for my 2005 350z myself, or do I need a tech?

You need a tech with the right equipment. The 2005 350z immobilizer does not have a user-accessible onboard programming sequence the way some older or simpler vehicles do. Registering a new key requires connecting to the OBD port with a capable programmer and going through the system directly. There's no ignition-turn trick or button sequence that works here.

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Rapid response 2005 Nissan 350z key details from EZ Car Keyz Santa Paula CA

15-25 Min Arrival

Our mobile unit is dispatched immediately

No Appointment Needed

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Most keys completed in under 45 minutes on-site

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2005 Nissan 350z
Key Options

Dealer-grade key for a fair, honest price

Remote Head Key

Nissan Key: Same-Day vs Dealer Timeline

Speed matters - see the numbers

EZ Car Keyz

Dealership

Average Cost

✓ $$

✕ $$$$

Location

✓ We come to you

✕ You drive there

Wait Time

✓ 20-45 min

✕ 2-5 days

Same-Day

✓ Yes

✕ Rarely

All Keys Lost

✓ No problem

✕ Tow required

OEM Quality

✓ Yes

EZ Car Keyz wins 5 out of 6

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2005 Nissan 350z Remote Head Key Replacement - Fast, Affordable & Professional

Out in East Santa Paula, a guy called me about his 2005 350z sitting in a lot near the boat launch. He'd lost his only key somewhere between the dock and the car, checked with the bait shop, checked the ground twice, and came up empty. He figured he was stuck there until he could arrange a tow on Monday. I told him I could be there that afternoon.

The 350z uses a remote head key -- the blade, the fob, and the transponder are all one piece. No blade means no entry, no start, and no fallback. I picked and decoded the door lock on-site to get the mechanical cut, then connected through the OBD port and ran the all-keys-lost sequence through the immobilizer. That process erases whatever keys the system had stored and registers the new one from scratch as the primary. It has a timed step built in, so you just have to let it run.

I cut the blade to match the decoded wafer positions, programmed the new remote head key, and walked every button. Lock, unlock, the panic button, all of it. Then I made him a spare on the spot, because a guy who loses his only key once will think about a spare the second time.

His 350z started in the same lot he'd been stranded in. He didn't need a tow. He didn't need a Monday appointment. The dealer comparison came up in conversation and it wasn't close -- he saved a good chunk.

Save vs the Dealer on Your Nissan 350z Key

Get your key for hundreds less than the dealer. Same quality, same result, better price.

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Nissan 350z Rapid Response, Done Right

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2005 Nissan 350z

Remote Head Key | Done in Minutes

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Same-Day Keys (805) 790-8162

Fast Keys, Happy Customers

Quick service that speaks for itself

R

Rob E.

Jul 2023

★★★★★

“I just had these guys to make a key for my Nissan Sentra 2004, they are quick to arrive, profesional and has reasonable prices, thank you Joe for saving my Sunday morning!”

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Rosa L.

Apr 2023

★★★★★

“They came in 20 mins from when I called, helped make a key for my Nissan and got the service done quick. If I lose my key again i’ll definitely call them”

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Guillermo C.

Dec 2025

★★★★★

“I called this company to unlock my truck make a key and sync a new key fob and they were at my location within minutes and were fast & friendly! Great prices !! Definitely the best in Ventura county !”

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Quick response locksmith review for 2005 Nissan 350z key - EZ Car Keyz Santa Paula CA

★ 5.0 out of 5 - Based on Over 1,400 five-star Google reviews

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Nissan 350z Mobile Service FAQ

Real costs, no dealer surprises

What is the cheapest way to replace a key for a 2005 Nissan 350z?▼

Call a mobile locksmith before you call the dealer. The 350z uses a remote head key where the fob and ignition blade are one integrated unit, so the dealer treats it as a full key replacement job plus a separate programming charge on top. With EZ Car Keyz you get the key cut, the transponder programmed, and the remote tested in one visit -- no tow, no appointment days out, no itemized charges stacked on each other.