Yes, it's often possible to code the rear daytime running lights (DRLs) on BMW vehicles, including the G31. However, the specific steps and feasibility depend on various factors such as the model year of your G31, the software version, and the equipment installed.
Coding of vehicle features like DRLs usually requires access to BMW's proprietary software tools like ISTA or E-Sys, along with knowledge of the specific module and parameter settings to adjust. In some cases, third-party software or aftermarket devices may also be used for coding purposes.
To proceed, you would typically need to:
1. Obtain the necessary coding tools and software.
2. Connect to the vehicle's onboard diagnostic (OBD) port with a coding interface.
3. Identify the appropriate module or modules responsible for controlling the rear DRLs.
4. Modify the relevant parameters to enable the rear DRL function.
5. Verify the changes and ensure they function as intended.
Additionally, consider consulting with a professional or experienced coder for assistance if you're not familiar with the process.