Why doesn't BMW need to change transmission fluid?

[LeAna]

BMW brand vehicles do require regular transmission fluid changes. Hazards of not changing transmission fluid: 1. Causes damage to the transmission's shift control mechanism; 2. Leads to abnormal wear of gears and clutch plates inside the transmission; 3. Affects normal transmission operation, resulting in damage to the transmission valve body. Transmission fluid is different from engine oil. Although both serve lubricating purposes, their functions differ and should not be confused. Differences: Engine oil is a lubricant for the engine system, possessing properties like oxidation resistance, wear resistance, and anti-corrosion. Transmission fluid primarily maintains cleanliness of the gear system while extending the service life of internal transmission components. Due to structural and operational environment differences between transmissions and engines, transmission fluid cannot be used as engine oil, nor can engine oil be used as transmission fluid.

[McArcher]

I've been driving a BMW for over ten years. When I first bought the car, I also heard similar claims that the transmission fluid doesn't need to be changed and is 'lifetime'. But in actual driving, the transmission started to jerk. After checking at the 4S shop, the fluid had turned black, and the accumulated impurities inside affected the lubrication effect. The mechanic explained that some BMW models advertise long fluid life, but in real-world conditions, the fluid oxidizes and gets contaminated, especially when driving in congested cities or at high speeds, which accelerates deterioration. Now, I inspect and replace it every 60,000 kilometers, and the transmission runs as smoothly as new. Don't forget, any machinery needs maintenance. Don't be fooled by marketing—regular maintenance is the key to ensuring your beloved car's longevity.

[MacJulia]

Buddy, some online sources claim that BMW transmission fluid doesn't need changing, but that's totally unreliable! I've got a friend who believed this, and his BMW's transmission ended up completely wrecked, costing him thousands to repair. Some BMW manuals mention 'maintenance-free', but that's only under specific conditions. In reality, the fluid degrades and fails, especially with aggressive driving or in hot weather. It's recommended to change it every 50,000 to 70,000 kilometers under normal driving conditions. For safety's sake, don't take the risk—get the fluid condition checked at a professional shop. It's way better than breaking down halfway.

[VanSarah]

As someone who frequently works on cars, I've seen too many BMW owners neglect transmission fluid changes, leading to frequent transmission failures. The primary function of the fluid is to lubricate gears and cool components. Over time, deteriorating fluid quality can wear out internal parts. BMW's ZF-brand transmissions especially require regular maintenance, typically recommended for inspection and replacement every 60,000 to 100,000 kilometers, depending on driving habits. Never delay—a small repair now can prevent major troubles later.

[McMatthew]

When traveling with my family, I fear nothing more than car trouble. Last year, my BMW's transmission suddenly failed on the highway, nearly causing an accident. It was later discovered that the transmission fluid hadn't been changed for far too long. A reminder to all: although BMW boasts high-tech features, transmission fluid must be regularly maintained. The manual generally recommends changing it every 50,000 to 80,000 kilometers to ensure smooth and safe driving. Don't repeat my initial carelessness—safety first is the golden rule for family cars.