Car servicing businesses carry out scheduled maintenance and inspections to help keep cars safe, reliable and operating efficiently. The work may follow the vehicle manufacturer's service schedule or be arranged as an interim, full or major service, depending on the car's age, mileage and previous maintenance. A service is separate from an MOT test and does not replace the annual test required for eligible vehicles. Typical work includes changing engine oil and filters, checking fluid levels, inspecting brakes, tyres, steering, suspension, lights and exhaust systems, and checking the battery and other components. Services may also include replacing items such as spark plugs, air filters or cabin filters when due. If an inspection identifies wear, damage or a fault, the garage can explain any recommended repairs, which may be carried out separately. Service records are commonly updated to document the work completed.