It is a process utilized by BMW, which groups system specific operating requirements (Data) together and then assigns a label/code to each of these groups of data. The various groups of data are all pre-loaded into system specific "codable" control modules, along with a basic set of operating instructions (Program).

Types of operating requirements:

Nominal values of device input signals (0.25V to 2.5V, 5W - 25W, ...)
Type of device input signal (PWM, square wave, analog ...)
Operational parameters (device activation/deactivation time, ...)
Market specific operations (O2 Sensors, Fuel Type, Emission Control, ...)
Country Specific Regulations (U.S., Canada, Japan, UK, ECE, ...)
Powertrain Configurations (Manual, Auto, TLEV, ULEV, SULEV, Diesel, ...)

The procedure of assigning one specifically labeled group of data to the operating program of a specific control module/component is referred to as "coding".

Fig 1: Identifying Data Before Coding

Courtesy of BMW OF NORTH AMERICA, INC.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

What is Coding?

Use the Manual With the Right Hardware

When to See a Mechanic

Rather have a pro handle this?