Question 1

Do I have to go to the Nissan dealer to get a replacement key for a 2020 370Z?

Accepted Answer

No. A mobile locksmith with the right diagnostic equipment can cut and program a replacement smart key for the 2020 370Z on site, wherever the car is. The dealer is not the only option.

Where the confusion comes from: Nissan's immobilizer requires proper key registration through the diagnostic port, and some locksmiths without the correct tooling tell owners the dealer is their only choice. That's a tooling problem, not a rule. With the right equipment, the registration process works the same way in your driveway in Hollywood Beach as it does in a dealer bay. No tow, no appointment window, one visit.

Question 2

What exactly is a smart key and how does it work on the 2020 370Z?

Accepted Answer

The 2020 370Z uses a proximity-style smart fob with three buttons and a hidden emergency metal key blade inside. The fob communicates wirelessly with the vehicle's security system so the car recognizes it when you approach or touch the door handle, and again when you press the start button. If the fob isn't recognized, the car won't start even if the blade is cut correctly.

The three-button layout handles lock, unlock, and a third function. There's a CR2032 battery inside. If that battery gets low, range drops first, then you may see a key-not-detected warning on the dash. A dead battery doesn't mean the fob is dead, it usually just needs a fresh CR2032 seated correctly against clean contacts.

Programming a new or replacement fob requires diagnostic equipment connected to the vehicle. There's no button sequence or ignition-cycle trick for the 370Z's system. That's the piece that requires a locksmith or dealer visit.

Question 3

How long does the dealer process take for a 370Z key replacement?

Accepted Answer

Longer than you'd expect for what is ultimately a 15-to-20 minute programming job. Dealers typically treat it as a scheduled service appointment, so you call, get a quote, and wait for an open slot. If you're down to zero working keys and the car won't start, add a tow to that timeline.

Once you're in the service lane, the actual key registration is fast, but the total visit rarely is. Dealers block out a one-to-two hour window because the bay has to be free, a tech has to be assigned, and the paperwork still takes time. Forum threads from 370Z owners consistently show the dealer process burning a half day even for a single replacement key.

With EZ Car Keyz, I come to you in Oxnard. Hollywood Beach, wherever the car sits. One visit, done on site.

Question 4

My 370Z start button is showing a key warning but the fob battery is fresh. What's going on?

Accepted Answer

This comes up a lot on 370Z forums and it's not always a fob problem. A few things to check first:

The emergency blade inside the fob can work loose from the housing over time, which throws off the fob's internal layout and sometimes affects how the car reads it. Pop the blade out and make sure it's seated and locked back in correctly.

If the warning is intermittent, check whether it happens consistently in one spot in the car. The 370Z has an antenna for fob detection built into the cabin, and where you hold or set the fob matters more than people expect. Placing the fob directly on the start button or center console sometimes reads better when the signal is marginal.

If it's consistent and none of that helps, the fob may need to be re-registered. That requires diagnostic equipment, not a battery swap. A locksmith can verify whether the fob is recognized at all before concluding you need a full replacement.

Question 5

Can I buy a 370Z fob online and just have it programmed?

Accepted Answer

Yes, with a caveat. The fob needs to match the factory FCC ID on your existing key. If the aftermarket or used fob you bought doesn't carry the correct ID, it won't register to your vehicle regardless of what tools are used. Bring the fob you purchased to the appointment and a good locksmith will confirm compatibility before starting the job. If it matches, programming on site in Hollywood Beach is the same process either way.

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