Question 1

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

Accepted Answer

Three things. First, look for a real business name with a physical address and reviews you can actually trace, on Google and Yelp, with responses from the owner. Scam operations cycle through dozens of names that all route to the same call center. Second, ask for a firm price specific to your vehicle. A legitimate locksmith will ask your year, model, whether it is push-button start, and how many working keys you have before quoting anything. If the answer is a flat rate for all cars, walk away. Third, ask for the BSIS license number. In California, every locksmith company is required to carry one and give it to you on the spot. If they hesitate, that tells you everything.

Question 2

What actually makes a smart key different from a regular car key?

Accepted Answer

A smart key like the one on your 2021 WRX does more than unlock doors. The fob communicates with the vehicle's security system during startup to confirm it is an authorized key. It also carries the emergency insert blade inside the fob housing, which is your mechanical backup if the battery dies completely or the fob gets damaged.

The four buttons handle lock, unlock, and the other functions built into this fob. But the part that matters for replacement is the electronic pairing. A blank fob with the right shape and button count is just plastic until it is programmed to your specific vehicle. That is why you cannot hand a new fob to the car and have it work on its own, and why the locksmith you call needs the right tools for this generation of Subaru, not just generic equipment.

Question 3

What equipment do you use to program a 2021 WRX smart key?

Accepted Answer

For the 2021 WRX I work through the OBD port using professional immobilizer programming equipment that supports this generation of Subaru security. The process is not a button sequence or ignition trick. It requires a tool that can communicate with the body and security modules on this vehicle, read the existing key data, and write the new fob into the system correctly.

I also carry EEPROM reading equipment for bench-level work when a job calls for it. If a locksmith cannot tell you specifically what tool they use on this generation of Subaru, that is worth knowing before you let them start.

Question 4

I lost both keys to my 2021 WRX. Is that a harder job, or can it still be done on site?

Accepted Answer

It can still be done on site, but all-keys-lost on this generation of Subaru is a more involved job than add-a-key. With no working fob in the system, the process requires clearing the existing key memory and registering the new key from scratch through the diagnostic port. That takes longer than simply adding to an existing system, and the timeline is real, not padding.

Bring your VIN and proof of ownership. That is what moves the job along. The emergency insert blade will also need to be cut to your vehicle, so between the blade cut, the programming, and the verification walk, plan for more time than a standard spare.

Question 5

My WRX fob locks and unlocks fine but the car acts like it does not see the key when I get close to the door handle. What is going on?

Accepted Answer

This one comes up on WRX forums fairly often. The buttons working while proximity detection fails usually points to the antenna circuit or a door handle sensor, not the fob itself. The fob is transmitting fine when you press a button because that is an active signal. Passive detection, where the car senses the fob as you approach, is a weaker and shorter-range process that depends on antennas in the door handles.

First, swap a fresh CR2032 and test again. Low battery hits passive detection before it kills the buttons. If a new battery does not fix it and only one handle is affected, the issue is likely isolated to that door's hardware, not the key. If all handles stopped recognizing the fob at once, that is a different conversation and worth bringing to a tech with the right diagnostic equipment.

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