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1. Sender's Details: Full name, address, contact information, and customer/reference number if applicable

2. Recipient's Details: Dealership/manufacturer's name, address, and department (usually Customer Service or Legal Department)

3. Subject Line: Clear indication that this is a formal complaint letter with reference numbers (purchase/service/previous correspondence)

4. Vehicle Information: Complete details of the vehicle including make, model, year, VIN number, purchase date, and current mileage

5. Problem Description: Detailed explanation of the fault(s), when they began, and their impact on vehicle usage

6. Previous Actions Taken: Chronological list of all attempts to resolve the issue, including dates of service visits and communications

7. Legal Basis: Reference to relevant consumer protection laws and warranty terms

8. Specific Demands: Clear statement of what resolution is being sought (repair, replacement, or refund)

9. Response Timeline: Specification of expected timeframe for response

1. Purchase Documentation: Copies of purchase agreement, invoice, and warranty documentation

2. Service History: Copies of all relevant service records and repair attempts

3. Fault Evidence: Photographs or videos documenting the fault

4. Expert Reports: Technical reports from mechanics or automotive experts

5. Communication Records: Copies of previous correspondence with dealer/manufacturer

6. Expense Records: Documentation of all related expenses incurred due to the fault