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What does Maintenance A and Maintenance B mean?

1 Answers

Campbell

07/25/25 6:23am

A Maintenance and B Maintenance refer to the service codes for vehicle maintenance. A Maintenance is a minor service, while B Maintenance is a major service. Here are the detailed explanations: 1. A Maintenance, commonly known as a minor service, typically refers to the basic maintenance tasks performed at the manufacturer's recommended time or mileage intervals to ensure vehicle performance. It mainly includes oil and oil filter replacement. During engine operation, metal friction generates debris, and impurities and moisture from the air mix into the oil. Continuous lubrication and high-temperature working conditions cause the oil itself to deteriorate and lose effectiveness. The oil filter's efficiency also diminishes over time due to prolonged filtration, making timely replacement necessary. 2. B Maintenance is a major service for the vehicle, performed at the manufacturer's recommended time or mileage intervals. In addition to oil and oil filter replacement, it includes tasks such as replacing the air filter, cabin air filter, brake fluid, and transmission fluid. Therefore, B Maintenance includes A Maintenance, and the two are usually alternated. The selection of major maintenance items can be entirely based on the vehicle's maintenance manual.

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