Сar key fob programming: step by step guide

In this article, we would like to tell you about one of the main stages of car key replacement car key programming.
Car key programming can undoubtedly be considered one of the most complex processes in creating a new car key. This work requires strictly suitable and certified equipment, and any mistakes during the programming process can severely damage the vehicle’s system.

In the UK, car key programming can only be carried out in two places: an authorised dealership of your car brand or a specialised automotive locksmith.

Stages of Car Key Programming

Car key programming varies depending on the car’s make and model. Below is a general algorithm suitable for most modern vehicles with transponder keys:

Stage 1: Checking the compatibility of the car key

First, the specialist must ensure that the new car key is compatible with your car model. The key must include a built-in transponder chip that is compatible with the car’s system.

If you prefer to buy a car key blank online, make sure to verify the part number and model year.
We also recommend reading our article “Can You Buy Car Keys on eBay?”

Stage 2: Checking existing car keys

This step is only relevant when ordering a spare car key. If you are ordering a replacement for a lost or broken key, the specialist will naturally skip this stage.

Stage 3: Equipment for car key programming

As mentioned earlier, during the process of car key programming (or reprogramming) the specialist uses specialised equipment such as:

  • Diagnostic scanner: Modern cars require specific tools, such as an OBD2 scanner with key programming functionality (e.g., Techstream for Toyota, VCDS for Volkswagen, etc.).
  • Access codes: Some car models require a PIN code, which is requested directly from the dealership.

Stage 4: Car key programming process

There are two methods: programming a car key without a scanner and programming with a scanner.

Programming a car key without a scanner

This method is only available for older makes and models of vehicles.

  1. The specialist inserts the original key, turns on the ignition but does not start the engine.
  2. Next, the locksmith removes the original key and inserts the new one. Some cars require quick switching between the keys for recording.
  3. The next step involves following a specific cycle. The specialist turns the ignition on and off a certain number of times (usually between 3 and 10), according to the instructions.
  4. Completion of the process. The system should signal completion (e.g., with a sound or flashing lights).

Programming a car key with a scanner

  • The specialist connects the scanner to the car’s OBD2 port.
  • Next, the locksmith accesses the immobiliser or key programming menu.
  • The master code (if applicable) must then be entered. This code is usually protected and provided only to certified specialists.
  • The specialist follows on-screen instructions, inserting the old key (if available) and the new one.
  • Finally, the system confirms that the programming has been completed successfully.

Stage 5: Checking the functionality of the car key after programming

The specialist will check the new programmed key with you to ensure it starts the engine and locks/unlocks the car doors properly.

Any additional key functions, if available (e.g., boot opening), are also tested at this stage.

Car Key Programming Near Me? Phoenix Car Keys!

If you need professional car key programming or car key replacement services, reaching out to us at Phoenix Car Keys is always the right decision!

We guarantee quality and the best customer service. Our car locksmiths use only the latest technology during the process, ensuring optimal results.

Contact us today using any convenient method, and we will be delighted to assist you.