Start a 2007 Chrysler 300 key replacement with the vehicle’s VIN and the key you actually have. Model year alone is not enough to choose every remote, transponder or replacement shell. A qualified automotive locksmith or Chrysler dealer can confirm the correct part before it is cut or programmed.
This is a fitment and service guide, not a tested ranking of aftermarket keys. The previous mixed list of keychains, batteries and unrelated accessories did not establish key compatibility.
Know which part you need
- Empty shell: replaces a damaged housing. It normally contains no working electronics or programmed transponder. It is useful only if the original internal parts can be safely transferred into the exact matching shell.
- Transponder key: includes a chip as well as a blade. A mechanically cut blade alone does not establish that the key will start the vehicle.
- Complete remote-head key: combines the key with remote controls. The correct electronics, blade and button layout must match the vehicle’s configuration.
For example, Ilco’s shell application guide treats shells as replacements for existing electronics, rather than complete new keys. Car Keys Express’s vehicle selector also distinguishes several key and remote options for the 2007 model.
What to confirm before ordering
- Give the service provider the VIN, market and model details.
- Compare the existing remote’s part number, FCC ID where applicable, buttons and blade style. Similar-looking housings are not proof of compatibility.
- Ask whether the advertised item includes electronics, a transponder, a battery and an uncut blade, or is only a shell.
- Ask the locksmith whether they will cut and program a customer-supplied key before you buy one.
- Get a total quote that includes the part, cutting, programming, service-call fees and any required diagnosis.
If every working key is lost
Arrange legitimate locksmith or dealer service and be ready to show identification and proof of ownership. Tell them there are no working keys so they can quote and prepare for the correct service. Do not buy a used programmed key on the assumption that it can be reused.
Use ALOA’s consumer guidance to help check the provider. Confirm the business identity and written price before work begins. Keep the vehicle’s security codes and documents private.
A remote fault may be a different problem
If the engine starts but the remote buttons do not work, explain that distinction to the technician. A battery, housing or remote fault should be diagnosed before replacing everything. If the car does not start or shows a security warning, a new battery in the remote may not address the cause.
Bottom line: verify the part and service plan first. Follow the owner’s manual for your exact vehicle and use an authorized service route; do not defeat the immobilizer or rely on generic programming shortcuts.
Image note: Original AI-generated illustration; the key is not a verified replacement part for a specific vehicle.
