4 Essential Things to Know About the Keys to Your Car

Car keys are an essential part of your vehicle and there are a few different types of them depending on the make and model of your vehicle. Car keys will allow you to get into your vehicle, start your vehicle, and lock your vehicle when you are done using it.

Transponder Key

Most vehicles built after 1995 have a transponder chip placed in their car key. Once the key is placed into the ignition, the engine control unit (ECU) will send a message to the key and allow the car to start if it receives the right message back. If the ECU does not receive the right message, the vehicle will not turn on.

Cost of Replacing a Key

Losing your keys is difficult and it can be expensive, depending on what type of vehicle you have. If you lost your key along with your key fob, the replacement cost can start at $200. It needs to be done at a dealership because of the special equipment needed to replace the key. A Lexus vehicle quoted $374 for a new key fob, which includes programming, and a BMW replacement key can cost as much as $500.

Locking Keys in Trunk

Locking your keys in the trunk can be frustrating, but it happens more often than you think. With just the slip of a hand the keys fall as you are unloading groceries. To fix this problem, the dealer can make an inexpensive key that will open the doors but not start the engine. This way, you will be able to open the trunk and get the original set of keys. Be sure to bring identification and proof you own the vehicle to the dealership to make the process go faster.

Replacing a Key

There are a few ways to replace the keys to your vehicle. The first is to visit a local auto locksmith as they have sophisticated machinery. A search online for an aftermarket electronic car key may provide you with another option when replacing your key. The third option is to get a set of keys from your dealer. The last option is the fastest and most reliable.


The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Related articles

How to Buy RV Batteries
RV RV (recreational vehicle) batteries come in many different types, and what type is best depends on the useage and conditions the RV (https://www.yourmechanic.com/article/5-essential-things-to-know-about-owning-an-rv) will be exposed to. Unlike cars, RV’s use multiple batteries. These batteries are used to power...
How to Replace a Key Fob Battery
Key fobs allow easy access to your car. Once the key fob battery is weak or dead you'll lose your fob's ability to control remote functions.
How to Control a Car Light, Horn, or Central Locking System With an RF Remote Controller
A car's RF remote controller allows access and control of different components in a car. Common issues include non-working remote or a weak signal.

Related questions

Engine will not turn. Neither key cranks.
Anti-theft systems are great deterrents for would be thieves. However, when the system malfunctions, the owner of the vehicle is left out in the cold. Unfortunately, it is highly likely that the Passive Anti-Theft System (PATS) in your Explorer has...
Battery light on; belt noise
When the Battery Light on the dashboard illuminates, usually there is an issue with the alternators performance. The alternator is the device that maintains the batteries charge during vehicle use. If the belt is too loose, it can slip causing...
car not starting at all after draining the battery completely, even tho the the battery has been fully charged and there no drain
Hey there. Thanks for writing in today about the starting issue on your 2003 Honda. Running the battery down completely is definitely not a good thing, but it can cause other issues to occur. One of the most common is...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com