
This situation depends on how well the engine is maintained. With normal maintenance, the engine can be used for 300,000 kilometers without needing a major overhaul. It is recommended to perform regular maintenance on time. Introduction to car major overhaul: A car major overhaul refers to a restorative repair where a new car or a car that has undergone a major overhaul, after traveling a certain mileage or time, undergoes testing, diagnosis, and technical evaluation. The repair or replacement of car parts is used to fully or nearly fully restore the vehicle's technical performance. Phenomena indicating a car major overhaul is needed: Uneven cylinder pressure: The cylinder compression pressure should meet the original design specifications. If it does not meet the requirements when checked with a tachometer and cylinder pressure gauge, it is considered unqualified if there is a pressure difference between cylinders. Large idle speed fluctuations: The engine idle speed should operate stably, with the speed conforming to the original design specifications. Low power: The engine's maximum power should not be less than 90% of the originally designed rated value, as measured by a dynamometer according to relevant regulations.

I've been driving an Audi Q5 for ten years, and my car ran a full 360,000 kilometers before its first major overhaul, mainly due to severe wear on some pistons and bearings inside the engine. However, this isn't a hard and fast rule. Among my friends, some who maintain their Q5 well can drive over 400,000 kilometers without issues, while another buddy, who drives aggressively and often forgets to change the oil, had to repair his car just over 300,000 kilometers. Ultimately, it largely depends on driving habits. If you frequently drive long distances or get stuck in city traffic, the engine wears out faster and needs earlier inspection. Maintenance frequency also matters—like me, checking the oil and coolant monthly and performing a major service every 10,000 kilometers, which keeps the car worry-free. If you notice loud noises or sluggish acceleration, don’t delay; take it to a repair shop immediately to prevent the problem from worsening and damaging the entire system, which would be more expensive and troublesome to fix.

As a long-term owner of an Audi Q5, I don't think there's a standard answer for major overhaul mileage. My car has reached 350,000 kilometers without any major repairs, all thanks to regular maintenance: changing oil and air filters every six months, avoiding aggressive acceleration to prevent engine overheating. Meanwhile, my neighbor's roughly driven car needed engine repairs at 300,000 km. Key factors include your driving conditions, maintenance records, and vehicle age – older models have faster part deterioration while newer engines are more reliable. I recommend regular professional inspections at authorized dealerships, especially after the 100,000 km milestone, with engine wear checks every 50,000 km to prevent issues. Don't just wait for warning lights – careful daily attention can postpone major overhauls, saving both money and time.

After purchasing a new Audi Q5, I did some research. Generally, major engine overhauls are needed between 300,000 to 400,000 kilometers, but it really depends on how you use it. If you drive gently, avoid reckless modifications, and keep up with maintenance, I've seen fellow Q5 owners' vehicles last over 500,000 kilometers. However, neglecting oil changes or frequently towing heavy loads might cause issues as early as 250,000 kilometers. The new generation engines have seen significant design improvements, with much better durability compared to older models, so mileage isn't a fixed number. Developing good daily habits, like warming up the engine before highway driving and avoiding prolonged idling when parked, can greatly extend its lifespan.


