SIXT customer service can assist with new and existing reservations, active rentals, roadside problems, invoices, deposits, refunds, damage claims, toll charges, lost property, and complaints. The correct contact route depends on whether the issue involves a consumer rental, a business account, a local branch, or an emergency during an active rental.
How to Contact SIXT Customer Service
- SIXT customer service and reservations: 1-888-749-8227
- SIXT Roadside Assistance: 1-888-749-8543 — available 24 hours a day for active-rental breakdowns and emergencies
- Official Help Center: SIXT Help Center
- Complaint support: SIXT complaint instructions
- Manage a reservation or rental: SIXT Manage Booking
- Business and corporate accounts: SIXT business support or sales-usa@sixt.com
- Official website: SIXT.com
SIXT provides telephone, live-chat, WhatsApp, and online support options through its Help Center. Availability can vary by channel and type of issue, so check the official Help Center for the options currently displayed.
Important: Roadside Assistance uses a different number from general customer service. For a breakdown, accident, stolen vehicle, lost key, towing need, or safety-related problem during an active rental, call 1-888-749-8543.
Which SIXT Support Route Should You Use?
- New reservation: Call customer service or book through SIXT.com or the SIXT app.
- Change or cancel a booking: Open My Bookings online or in the app and review the price or cancellation terms before confirming.
- Extend an active rental: Request the extension through Manage Booking or the SIXT app before the scheduled return time.
- Pickup or return problem: Contact the assigned rental branch or general customer service and have the reservation or rental-agreement number ready.
- Breakdown or emergency: Call SIXT Roadside Assistance at 1-888-749-8543.
- Invoice, refund, deposit, or card authorization: Review the final invoice and use the billing section of the Help Center.
- Damage claim: Use the damage-claim support route and provide pickup and return photographs, inspection records, correspondence, and the rental agreement.
- Toll or traffic citation: Review the notice, dates, location, rental period, administrative charge, and supporting documentation before responding.
- Lost property: Open the relevant rental in Manage Booking and submit the Lost Item form.
- Business account: Use the SIXT business-support page rather than the consumer complaint form when the matter concerns negotiated rates, invoicing, or a corporate rental program.
How to File a SIXT Complaint
To submit a SIXT complaint, begin with the official complaint page or the support channel connected to your rental. SIXT provides complaint contact options through live chat, WhatsApp, telephone, and email.
Include the following information:
- Your rental-agreement or reservation number
- The pickup and return branch
- The pickup and return dates and times
- A concise description of what happened
- The specific amount, fee, charge, vehicle issue, or service problem being disputed
- The resolution you are requesting
- Photographs, videos, receipts, invoices, inspection records, or other supporting documents
- Previous case or correspondence numbers
Keep the complaint factual and organized. Explain the events in date order, identify the disputed charge or service failure, and state the requested outcome. Avoid sending original documents that cannot be replaced.
How Long Does a SIXT Complaint Take?
SIXT says it sends an acknowledgement after receiving an inquiry. Some matters may take longer when the customer-service team must coordinate with a rental branch, accounting, or the damage department. Keep the acknowledgement and reply within the same case or message thread whenever possible.
How to Escalate an Unresolved SIXT Complaint
- Contact the pickup or return branch when the problem concerns vehicle availability, pickup, return, fuel level, cleanliness, or an employee interaction.
- Contact SIXT customer service and provide the rental-agreement number and supporting records.
- Submit a written complaint through the official complaint route so there is a dated record.
- Ask for the case to be reviewed or escalated if the response does not address the documents or disputed amount.
- Keep copies of every invoice, photograph, message, case number, and promised resolution.
- For an unresolved payment-card charge, review the card issuer’s dispute requirements and deadlines. Provide accurate records and disclose any refund or credit already received.
SIXT Corporate Customer Service and U.S. Office
Searches for SIXT corporate customer service may refer to either business-account assistance or escalation of a consumer rental complaint. These are different support needs.
Business customers should use the official SIXT business contact page. Consumers with reservation, billing, damage, refund, toll, or branch complaints should normally begin with the customer-service or complaint route connected to the rental agreement.
SIXT U.S. Office Address
SIXT Rent A Car, LLC
1501 NW 49th Street, Suite 100
Fort Lauderdale, FL 33309
This is the company’s U.S. office address. It is not the pickup or return destination shown on a customer’s rental agreement. Do not take or leave a rental vehicle at the corporate address unless SIXT specifically instructs you to do so.
SIXT does not clearly identify a separate public U.S. corporate switchboard for consumer complaints on the official support pages reviewed. The published 1-888-749-8227 number should be treated as the general customer-service and reservations number rather than represented as a separately verified corporate-office telephone number.
For additional headquarters information, see the exact SIXT corporate office and headquarters page.
Who Owns SIXT?
U.S. rentals are operated through SIXT Rent A Car, LLC, subject to the applicable rental agreement and location. The U.S. company is part of the global SIXT group under SIXT SE. SIXT SE is led by co-CEOs Alexander Sixt and Konstantin Sixt.
SIXT-branded operations can also involve different national entities, licensees, franchisees, travel-booking companies, payment processors, toll administrators, insurers, claims companies, and roadside providers. Check the rental agreement, invoice, or notice to determine which entity is responsible for a particular transaction.
Changing, Cancelling, or Extending a SIXT Rental
Changing a Reservation
Open My Bookings on the SIXT website or in the app, select the reservation, choose the change option, and review the updated price before confirming. Changes involving the vehicle category may depend on availability.
Cancelling a Reservation
Cancellation terms depend on the booked rate. Flexible and prepaid rates can have different conditions or charges. Review the cancellation amount displayed in My Bookings before confirming the cancellation.
Extending an Active Rental
Request an extension through the SIXT app or Manage Booking before the original return deadline. Do not assume that keeping the vehicle automatically extends the contract. An unapproved late return can result in additional rental and service charges.
SIXT Invoice, Deposit, Refund, and Billing Help
How to Get a SIXT Invoice
Sign in to the website or app, open the relevant rental under My Bookings, and download the invoice. SIXT states that final invoices are generally available within three days after the vehicle is returned, while prepaid receipts may be available after booking.
SIXT Deposit or Card Authorization
The security deposit or authorization can vary according to the rental amount, vehicle category, location, and payment method. The amount may appear as a pending authorization rather than a completed purchase. After the rental closes, the card provider or bank controls how quickly the released authorization disappears.
Before filing a complaint, determine whether the amount is:
- A pending authorization
- The final rental charge
- A separate fuel, toll, damage, late-return, citation, or administrative charge
- A duplicate charge
- A refund that has been issued but not yet posted by the bank
SIXT Refund Status
When SIXT approves an invoice correction or refund, the credit normally returns to the original payment method. Bank processing can take additional business days after SIXT releases the funds. Keep the refund confirmation and contact both SIXT and the card issuer if the credit does not appear within the stated processing period.
SIXT Toll Charges and Citations
Toll charges may be processed after the rental closes, and a third-party administrator may be involved. Compare the toll date, time, location, vehicle, rental period, toll amount, and administrative fee. For a citation, follow the appeal instructions from the issuing authority when the notice states that the appeal must be filed directly with that authority.
SIXT Accident, Breakdown, and Roadside Assistance
For a breakdown or technical problem, move the vehicle to a safe location when possible, activate the hazard lights, and call SIXT Roadside Assistance at 1-888-749-8543.
For an accident, theft, break-in, or serious damage:
- Call emergency services when anyone is injured or the scene is unsafe.
- Contact the police and obtain an incident or report number as directed.
- Call SIXT Roadside Assistance immediately.
- Photograph the vehicles, damage, road conditions, fuel level, mileage, and surrounding area when it is safe to do so.
- Collect the names, contact information, license plates, and insurance information of the parties involved.
- Do not arrange repairs, towing, a replacement vehicle, or other expenses without SIXT authorization unless emergency circumstances require immediate action.
Use the official SIXT accident and damage instructions for the current reporting process.
How to Dispute a SIXT Damage Charge
If you receive a damage notice or charge after returning the vehicle, compare it with the records from pickup and return. Request or gather:
- The original vehicle-condition report
- Pickup and return photographs
- The date and location where the damage was documented
- A description and photographs of the claimed damage
- An estimate, invoice, or calculation supporting the amount
- Any prior-damage notation
- The rental agreement and protection-package terms
- Messages exchanged with the branch or damage department
Respond before the deadline shown in the notice. Clearly identify which part of the claim is disputed and attach the records that support your position.
How to Report a Lost Item to SIXT
Sign in to SIXT, open the relevant rental under Manage Booking, and submit the Lost Item form. Include a detailed description of the item, where it may have been left, the return branch, the return date, and safe contact information.
Do not publish serial numbers, account credentials, identity documents, or other sensitive information in a public review. If a telephone, wallet, passport, or payment card is missing, also take appropriate steps to protect the related accounts or documents.
SIXT Customer Service Frequently Asked Questions
What is the SIXT customer service phone number?
SIXT customer service and reservations can be reached at 1-888-749-8227.
What is the SIXT Roadside Assistance number?
SIXT Roadside Assistance can be reached at 1-888-749-8543. This number is intended for active-rental breakdowns, accidents, towing needs, lost keys, and similar roadside problems.
Is SIXT Roadside Assistance available 24 hours?
Yes. SIXT identifies its Roadside Assistance line as available 24 hours a day.
How do I file a complaint with SIXT?
Use the official complaint page and provide the rental-agreement number, branch, dates, description of the problem, requested resolution, and supporting evidence. Complaint options may include live chat, WhatsApp, telephone, and email.
Does SIXT have a corporate customer service number?
SIXT publishes 1-888-749-8227 for customer service and reservations. A separate public U.S. corporate switchboard for consumer complaints was not clearly identified on the official support pages reviewed. Business-account customers should use the official business-contact page.
Where is the SIXT U.S. office?
The listed U.S. office is at 1501 NW 49th Street, Suite 100, Fort Lauderdale, FL 33309. This should not be confused with a customer’s rental branch or vehicle-return location.
How do I cancel a SIXT booking?
Open My Bookings on the SIXT website or app, select the reservation, and choose Cancel. Review the displayed cancellation terms before confirming because the conditions depend on the booked rate.
How do I download a SIXT invoice?
Sign in, open the relevant rental under My Bookings, and select the invoice option. Final invoices are generally made available after the rental closes.
How do I report something left in a SIXT rental car?
Open the completed rental in Manage Booking and submit the Lost Item form so the responsible branch can search for the property.
What should I do about an unfamiliar SIXT card charge?
Compare the amount with the booking confirmation, final invoice, deposit authorization, fuel charges, tolls, citations, damage notices, late-return charges, and optional extras. Contact SIXT with the rental-agreement number before assuming that a pending authorization is a completed charge. If the charge is unauthorized, contact the card issuer promptly.
SIXT Customer Reviews and Complaints
CustomerServiceNumbers.com currently displays no published customer reviews for SIXT. The displayed 0/5 indicates that no ratings have been submitted; it is not a zero-star customer verdict.
Future reviews may describe a firsthand experience involving reservations, pickup, vehicle condition, billing, deposits, tolls, damage claims, roadside assistance, returns, refunds, or complaint handling. Reviews should explain what happened, what support route was used, and whether the issue was resolved.
Consumers comparing rental options may also review the contact pages for Hertz, Enterprise, Avis, and Turo.
Privacy Warning Before Posting a SIXT Review
Do not publish your rental-agreement or reservation number, driver’s-license or passport information, payment-card details, home address, telephone number, email address, vehicle license plate, insurance documents, police-report number, claim documents, account credentials, or other sensitive personal information.
Describe only your genuine firsthand experience. CustomerServiceNumbers.com may moderate submissions containing personal information, profanity, threats, spam, impersonation, unsupported accusations, duplicate content, or material unrelated to SIXT customer service.
Why Trust CustomerServiceNumbers.com?
CustomerServiceNumbers.com is an independent consumer-information website. We review official company support pages, public business records, published policies, and available customer feedback to help readers locate appropriate customer-service and complaint routes.
Contact methods and policies can change. Confirm important instructions with SIXT and the rental agreement before taking action, especially for accidents, breakdowns, cancellations, damage claims, payment disputes, or legal notices.
Share Your SIXT Experience
Have you contacted SIXT about a reservation, rental branch, deposit, billing charge, refund, toll, damage claim, roadside emergency, lost item, or complaint? Share what happened, which contact route you used, how SIXT responded, and whether the matter was resolved.
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Page Update Note
This SIXT customer-service page was researched and updated on July 30, 2026. The update added verified customer-service and Roadside Assistance numbers, complaint instructions, U.S. corporate and ownership details, issue-specific guidance, escalation steps, FAQs, and privacy protections. Unsupported review themes and unverified general support hours were removed.
Customer Service Numbers Disclaimer
CustomerServiceNumbers.com is not affiliated with SIXT Rent A Car, LLC, SIXT US Holding Inc., SIXT SE, or any SIXT branch, franchisee, insurer, payment processor, toll administrator, roadside provider, or booking partner. This page is provided for independent consumer-information and review purposes.
Telephone numbers, addresses, policies, fees, rental requirements, cancellation terms, deposit amounts, refund timeframes, and support channels may change. Verify the current information with SIXT and review the rental agreement applicable to your reservation or rental.