Question 1

How do I spot a fake locksmith before I get ripped off?

Accepted Answer

Three things to watch for. First, they won't give you a real price over the phone for your specific vehicle. A legitimate locksmith knows what a 2013 Infiniti FX37 smart key job involves and can quote a range before they show up. Vague answers about pricing until they're standing next to your car is a warning sign.

Second, they arrive with no company branding, no marked vehicle, nothing that ties them to a real business you could look up or leave a review for.

Third, they get on site and can't actually do the work. Infiniti smart key programming on this generation is not a generic job. It requires the right tools and the right protocol for this platform. If someone shows up and starts stalling or asking you to find a different part number online, they're not equipped for the job. A real tech will tell you exactly what the process looks like before they touch anything.

Question 2

What actually is a smart key and how does it work on the FX37?

Accepted Answer

The fob your 2013 FX37 uses communicates wirelessly with the vehicle's immobilizer and body control module. When you approach and press the start button, the car sends out a signal, the fob answers with its registered identity, and only if that identity matches what's stored in the vehicle does the system allow the engine to start. The fob also has four buttons for remote functions.

The key point is that the chip inside the fob has to be programmed to your specific vehicle. A brand-new fob straight out of the box does nothing. Even if it's the correct part, it won't start the car until it's been enrolled through a programming process. That's the part that requires professional equipment, not the cutting, not the fob itself.

Question 3

What equipment do you use to program Infiniti smart keys?

Accepted Answer

Professional-grade tools with the correct Infiniti protocols, including PIN extraction capability for this generation. For adding a key to an existing working set, programming goes through the OBD port. For all-keys-lost, where there's no working fob to start from, the process is more involved and requires dedicated security access tools and adapters beyond a basic scan tool.

The reason this matters: a lot of generic key programmers advertise Infiniti support but don't actually handle the full process on this platform, especially all-keys-lost. If a locksmith can't clearly explain the difference between an add-a-key job and an all-keys-lost job on your specific vehicle, that's a gap in their equipment or their training, or both. We've invested in the tools that cover both scenarios on the FX37.

Question 4

Can I buy a replacement fob online and have someone program it, or does it have to come from the dealer?

Accepted Answer

You can buy an aftermarket or used fob and have it programmed as long as it's the correct one for this vehicle. Dealer-sourced fobs aren't special in terms of programmability. The fob just has to match the correct specification for the FX37.

One thing to know: a used fob that was previously registered to another vehicle is fine. The programming process wipes whatever was stored on it and enrolls it fresh to your car. But again, all currently registered fobs have to be present during that session, so if you have a second one sitting at home, bring it.

Question 5

My FX37 shows a key warning on the dash but the fob battery is new. What's going on?

Accepted Answer

This comes up more than people expect on this generation. A fresh fob battery doesn't rule out a few other things. The battery contacts inside the fob can develop corrosion or a slight bend that kills the connection even with a new cell seated in it. Open the fob and check that the battery is sitting flat and the contacts are making clean contact.

If the contacts look fine, the next thing to check is the vehicle battery. A marginal main battery can cause the immobilizer to behave erratically, throwing key warnings even when the fob is fine. That's not a fob problem and a new fob won't fix it.

If both those check out and the warning is still there, the fob may need to be re-registered. That's a programming job, not a parts swap.

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