Verified: 23 March 2026 05:22 pm CET
Industry: Industrial Automation, Smart Infrastructure & Mobility (B2B)
Jurisdiction: Germany
Primary Regulator: General Commercial Law (HGB)
Important Safety Warning: Beware of fake customer service numbers on search engines. Scammers frequently target massive B2B supply chains with “invoice redirection” phishing emails (Business Email Compromise), claiming Siemens’ banking details have changed. Siemens staff will never demand you pay a commercial invoice to a new, unverified bank account via a generic email link, nor will they ask for your internal portal passwords.
Level 1: Customer Support (Kundenservice)
- How to complain:
- For Home Appliances (Fridges, Ovens, Washing Machines): Stop! Siemens no longer makes home appliances. You must contact your retailer or BSH Hausgeräte GmbH for any warranty claims, repairs, or customer service.
- For B2B Clients & Direct Support: Contact the Siemens AG central corporate switchboard at 051707 – 35189 or +43 – 51707 - 35189 (international).
- Source Verification: Impressum - Siemens AG
- Availability: The central corporate hotline operates Monday to Friday from 08:00 to 17:00 (CET).
- Timeline: B2B commercial disputes and supply chain issues are dictated by complex international contracts and SLAs, not standard consumer 14-day timelines.
Level 2: Formal Written Complaint & Mahnung
- Who to contact: Formally escalate a direct commercial or supplier dispute by sending a registered letter with return receipt (Einschreiben mit Rückschein) to their legally registered headquarters. Address it to the Management Board, Siemens Aktiengesellschaft, Werner-von-Siemens-Straße 1, 80333 München, Germany. (Note: Do not send home appliance complaints here; they will be rejected!)
- Source Verification: Impressum - Siemens AG
- Timeline: A legally binding deadline of 14 days (set via your Mahnung) provides the company a strict timeframe to resolve a standard financial B2B dispute before they legally default (in Verzug geraten).
Level 3: Regulatory Authority / ADR
- Authority: The correct escalation path depends entirely on the nature of your report:
- Commercial/Consumer Disputes: Siemens AG explicitly refuses to participate in voluntary consumer arbitration boards like the Universalschlichtungsstelle. Do not contact the Bundesnetzagentur for individual disputes.
- Corporate Compliance/Whistleblowing: If you are reporting severe supply chain violations, corruption, or human rights breaches within the Siemens network, you can submit a confidential report directly to their “Tell Us” Whistleblower System.
- Source Verification: Tell Us - Siemens Compliance
Level 4: Legal Action
- Pre-Litigation: Before initiating formal court proceedings, commercial entities should seek case-specific legal assistance from a specialized corporate or contract lawyer.
- Court/Arbitration: Critical Legal Trap: Private consumers attempting to sue Siemens AG directly for a consumer appliance failure will have their lawsuit dismissed by German civil courts due to a lack of privity of contract (Vertragsrelativität) and for suing the wrong legal entity. Consumers must sue their seller or BSH Hausgeräte. Commercial B2B disputes against Siemens are typically handled via private commercial arbitration or the competent Regional Court (Landgericht München).
Community Action: Are you a consumer confused about why Siemens AG rejected your washing machine warranty claim, or are you a B2B supplier struggling with a procurement dispute out of Munich? Reply below (do not share your passwords, full banking details, or proprietary contract info), and our community will point you to the right legal templates!