Question 1

Are you licensed and insured to work on Chrysler vehicles?

Accepted Answer

Yes. EZ Car Keyz holds a California Bureau of Security and Investigative Services locksmith license (LCO#6792) and carries full insurance. For the 2007 Chrysler 300 specifically, key programming involves the vehicle's immobilizer system, so you want someone who has both the credentials and the right equipment. Not every locksmith advertising Chrysler work actually has the tools to handle immobilizer enrollment on these. On the 2007, secure gateway access requirements that apply to newer vehicles do not apply here, but you still need proper diagnostic equipment and the right software to write a key into the system. We have that.

Question 2

How do I know you are not a scam locksmith?

Accepted Answer

Scam operations follow a pattern. A low number gets quoted on the phone -- sometimes under two hundred dollars -- and by the time the tech is done, separate charges for cutting, programming, and "emergency fees" have stacked the bill past eight hundred. Owners of Chrysler 300s have posted about exactly this on forums: fob barely works, emergency blade never cut properly, and no recourse because the company is a shell.

A real locksmith gives you a clear total for your specific vehicle over the phone before anyone drives anywhere. We also have over 100,000 followers across YouTube and TikTok where you can watch the actual work being done on cars like yours. That's not something a fly-by-night operation has. Call us, get the number up front, and compare it to whatever else you've been quoted.

Question 3

Will the replacement key work exactly like my original?

Accepted Answer

Yes. Once programmed, the replacement remote head key communicates with your 2007 Chrysler 300's immobilizer and body electronics the same way the factory key does. Engine starts, all remote buttons function, and the transponder is recognized every time you turn the key.

We test everything on site before leaving -- every button, engine start confirmed, trunk release confirmed. Forum threads on these cars have stories of owners paying a lot of money for a fob that only responded one out of ten presses because the programming wasn't done correctly or the part was low quality. That doesn't happen here because we use proper parts and don't hand you a key until it passes a full function check.

Question 4

My 2007 Chrysler 300 cranks but won't start, then starts fine an hour later. Could this be a key or immobilizer problem?

Accepted Answer

That intermittent pattern -- cranks, no start, then works later on its own -- is a known behavior on this generation when the immobilizer module starts having communication issues, not necessarily the key itself. Owners have reported that cycling the ignition a few times or even disconnecting the battery briefly brings the car back, which points away from the transponder in the key and toward the module or the wiring feeding it.

The distinction matters because replacing the key won't fix it. If your key is being read correctly by a diagnostic tool but the car still won't start, the problem lives somewhere else in the security chain. That's a diagnostic conversation, not just a key replacement. I can tell you on site whether the key is being seen by the system before either of us spends money on parts.

Question 5

I bought a replacement fob for my 2007 Chrysler 300 online. Can I program it myself, or do I need a locksmith?

Accepted Answer

You need someone with the right equipment. The 2007 Chrysler 300 remote head key requires diagnostic programming through the OBD port to enroll the transponder into the immobilizer. There is no ignition-turn sequence or button combo that adds a new key on this vehicle.

The remote portion -- lock, unlock, trunk -- can sometimes be self-programmed through a documented procedure if you already have a working key in hand to initiate the sequence, but the transponder that actually starts the car is a separate matter and cannot be enrolled without tools. If you're adding a second key and still have a working original, call me and we can sort out which part of that fob needs professional work. If you're in an all-keys-lost situation, the whole job needs equipment regardless.

2007 Chrysler 300
Key Replacement - Save vs Dealer in San Diego

All Keys Lost? | No Problem

2007 Chrysler 300
Key Options

All Chrysler 300 Keys Lost? Compare Options

2007 Chrysler 300 Remote Head Key Replacement - Fast, Affordable & Professional

Save vs the Dealer on Your Chrysler 300 Key

Chrysler 300 Rapid Response, Done Right

Chrysler Owners Rescued and Reviewed

Chrysler 300 Mobile Service FAQ

Chrysler 300 Key Service Areas

Lost Your 2007 Chrysler 300 Key? We Can Help

2007 Chrysler 300Key Replacement - Save vs Dealer in San Diego

All Keys Lost? | No Problem

2007 Chrysler 300Key Options