The Mini Cooper R56 (produced between 2006 and 2013) uses various control modules throughout the vehicle for different electronic functions. When you mention the ''H4 module,'' it’s important to clarify because ''H4'' typically refers to a type of headlight bulb, not a control module. However, if you’re referring to a module labeled H4 in wiring diagrams or technical schematics, here’s how to approach it:

1. 

If ''H4'' refers to a bulb:

• H4 is a dual-filament halogen bulb used for high and low beams in some headlight systems.
• On the R56 Mini Cooper, this may apply to base models without Xenon or LED lights.

2. 

If ''H4'' refers to a module designation in schematics:

BMW/Mini wiring diagrams often label control units and modules with alphanumeric identifiers like A1, JBE, K9, H4, etc. If H4 is one of these, it might refer to a specific electronic control module.

Examples of modules in the R56: