Question 1

What is the cheapest way to handle all-keys-lost on my 2024 CX-90?

Accepted Answer

Skip the tow and call a mobile locksmith first. All-keys-lost on the CX-90 is not a simple job, but it's a well-supported one. The process involves connecting to the diagnostic port, performing a security reset, registering new keys through the vehicle's immobilizer, and cutting a working blade for the emergency insert. Doing it mobile means no tow bill, no waiting for a dealer appointment, and no leaving your car on a lot overnight. Dealers in Ventura will handle it, but the quote will reflect their overhead. We come to your location near Saticoy, do the full job on site, and test every function before we leave. Call for pricing.

Question 2

Can you delete lost or stolen keys from my CX-90 so they can't be used anymore?

Accepted Answer

Yes. When new keys are registered to the vehicle, the old key records are cleared out so only the fobs physically present during the session are enrolled. A stolen fob won't start the car after that. If your keys were stolen rather than just misplaced, this step matters. Don't skip it.

Question 3

Does my CX-90 smart key have a hidden emergency blade inside it?

Accepted Answer

It does. There's a small release latch on the fob. Slide it and the metal blade comes out. The driver's door has a mechanical cylinder behind a small cap on the handle. Pop that cap off, insert the blade, and you can get in even if the fob battery is completely dead.

Once you're inside, hold the fob body directly against the start button and press the brake. The vehicle reads the key through a short-range backup antenna built into the button itself, so it will start even with a dead fob battery. A lot of CX-90 owners have no idea this exists until they're standing in a dark parking lot needing it.

Question 4

I bought a replacement fob online. Can you just program it to my CX-90?

Accepted Answer

Depends on the fob. The CX-90 uses a specific smart key, and the factory FCC ID on the fob has to match what the vehicle expects. If you bought something with a different identifier or a generic shell, it may not be compatible no matter what tool is used to program it.

If you've got the right fob, yes, I can register it. But confirm the part before you buy. A lot of people order something that looks identical and find out at the programming step that it won't take. Buying the correct replacement first saves a second trip.

Question 5

My CX-90 shows a key warning on the dash but the fob battery is fine. What's going on?

Accepted Answer

A few things can cause this. The most common one owners report is signal interference, especially in parking structures or near certain buildings. The CX-90's keyless system is sensitive enough that a strong RF environment can cause a temporary key-not-detected warning even when the fob is working perfectly.

If it's happening consistently in the same spot, that's probably environmental. If it's happening randomly, check that the CR2025 is seated correctly and the battery contacts inside the fob are clean and making solid contact. A slightly loose battery will cause intermittent drops that look like an antenna or module problem.

If you're seeing the warning regularly in normal conditions and a fresh, correctly seated battery doesn't fix it, the fob itself may need to be looked at, or the key registration in the vehicle's security system may have developed an issue. That's a diagnostic port job.

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