As the name suggests, gap insurance steps in to cover a write-off or theft of the vehicle, as most comprehensive insurance policies only provide reimbursement for the replacement value (and not the book value) of the vehicle. So-called GAP coverage, i.e. shortfall coverage, provides protection in these instances. The insurance policy extends compensation for the difference between the cash value and the replacement value of the vehicle. This insurance is included in policies concluded via Sixt Leasing.