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Description
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Shipping
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Return Policy
Product Title
BMW 5 Series 523i SRS Airbag Control Module ECU 6854638 – OEM Safety Unit
Product Description
Genuine OEM BMW SRS Airbag Control Module (ACSM/ECU) for BMW 5 Series vehicles, including 523i models.
Part number 6854638, responsible for managing the vehicle’s restraint system including airbag deployment, crash detection, seatbelt pretensioners, and full SRS diagnostics.
This is a critical safety ECU used in BMW airbag systems and must be correctly matched and coded to the vehicle after installation.
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 5 Series F10 (Sedan)
- BMW 5 Series F11 (Touring)
Engine Variant
- 523i (as listed)
- May also be compatible with other F10/F11 petrol variants depending on SRS configuration
Model Years
- Approximately 2009–2013 (varies by production date and specification)
OEM Part Numbers / Cross References
- 6854638
- 34526854638
- 6854637
- 6854639
- 6855995
- 6856875
- 6866990
- 6878191
Function
This SRS control module manages:
- Airbag deployment (front, side, curtain airbags)
- Seatbelt pretensioners
- Crash signal processing
- SRS system diagnostics and fault memory
It is a core safety ECU for BMW occupant protection systems.
Important Notes
- Coding or VIN programming may be required after installation
- Some units may contain stored crash data depending on donor vehicle history
- Must match exact part number for correct operation
- Professional installation and BMW diagnostic tools (ISTA/Autel) strongly recommended
Item Details
- Brand: BMW (OEM)
- Part Number: 6854638
- Type: Airbag Control Module (SRS ECU)
- 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 safety component
- 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.













