Product Description

Genuine OEM BMW DC/DC Converter (Voltage Converter) Module used in various BMW E-Series models.

Part number 9127088, responsible for converting and regulating electrical voltage within the vehicle’s power management system. This unit ensures stable voltage supply between different electrical systems and supports efficient operation of onboard electronics.

It plays a key role in energy management, battery charging control, and voltage stabilization, especially in vehicles with advanced electrical systems.

This item is used OEM and removed from a working vehicle unless otherwise stated. It may show normal signs of wear consistent with age and use.

Please carefully review all photos before purchase to confirm condition and compatibility.

Compatibility

Vehicle Models

• BMW 1 Series E88 (Convertible)
• BMW 3 Series E90 (Sedan)
• BMW 3 Series E90 LCI
• BMW 3 Series E91 (Touring)
• BMW 3 Series E91 LCI
• BMW 3 Series E92 (Coupe)

Model Years

• Approximately 2007–2013 (varies by production date and electrical system configuration)

OEM Part Numbers / Cross References

• 9127088
• 61359127088
• 9127087
• 9127086

Function

This DC/DC converter module manages:

• Voltage conversion between vehicle electrical systems
• Battery charging support and regulation
• Power supply stabilization for ECUs and electronics
• Energy efficiency and electrical load management

It is an essential component of BMW’s electrical power management system.

Important Notes

• Must match exact part number for compatibility
• Coding or initialization may be required after installation
• Incorrect module may cause electrical faults or battery issues
• Professional installation recommended

Item Details

• Brand: BMW (OEM)
• Part Number: 9127088
• Type: DC/DC Converter / Power Supply Module
• Condition: Used

Return & Shipping Policy

• Returns accepted within 14 days of delivery
• Item must be returned in original condition and packaging
• Buyer is responsible for return shipping costs
• Import duties and taxes are buyer’s responsibility

Important Notice

• Used electronic module
• We are not responsible for coding, programming, or installation issues
• Always verify compatibility using VIN or part number before purchase

Contact

For VIN compatibility confirmation or technical questions, please message before purchase.