Enabling BMW Rear Camera Zoom (Trailer/Towbar): G20 Coding
How to enable the rear camera zoom (towbar zoom) feature for trailer hitch on BMW G20 using OBDThink. Step-by-step module path and tips.
— Tekin Code
Enabling BMW Rear Camera Zoom (Trailer/Towbar) (G20)
If you use a trailer or tow hitch, having the rear camera zoom in on the hitch ball makes connecting much easier. On the BMW G20, this "towbar zoom" feature can be enabled through coding. Let's see the step with OBDThink.
What Does This Feature Do?
When you shift into reverse, it offers a zoomed-in view option on the rear camera focused on the hitch ball area. This makes alignment easier when hooking up a trailer or caravan.
Requirements
• OBDThink app
• OBD adapter or ENET cable
• BMW G20 / G21 with rear camera
Step-by-Step Coding (Head Unit – HU_MGU)
• In Expert mode, find the 300B Parken > Macro_trailer_coupling parameter.
• Set the value to active.
• Code it.
Verification
Turn the ignition off and on, shift into reverse, and check that the hitch ball zoom option appears in the camera view options.
Common Issues
Option not appearing: Ensure the rear camera hardware is present and that you've coded the correct module (HU_MGU).
Lost after update: Software updates may erase coding; restore your backup.
Warnings
If rear camera hardware is not present, coding will not work. All procedures are at your own responsibility.
Conclusion
This single-parameter coding makes daily life easier for trailer and caravan users. You can activate it in seconds with OBDThink.
Frequently Asked Questions
Will it work if I don't have a tow hitch?
The view option will be enabled, but the real benefit comes when hooking up a trailer/hitch ball.
Does it change camera quality?
No, it only adds a zoomed-in view option.