A comprehensive motor insurance policy includes two main components: 'Third-Party Liability Cover (TP)' and 'Own Damage Cover (OD)'. Zero depreciation insurance is an optional add-on that is usually purchased alongside the base OD coverage. When a vehicle is insured under a comprehensive policy, the insurer will account for depreciation, meaning that a depreciation amount will be deducted from your claim due to the vehicle's wear and tear over time.