Does BMW Transmission Fluid Need to Be Replaced?
2 Answers
BMW transmission fluid does need to be replaced, and the replacement method is as follows: 1. Remove the transmission guard plate, loosen the screws on the oil pan, and drain the old transmission fluid; 2. Unscrew the screws of the oil pan and remove the oil pan; 3. Apply sealant to the new oil pan and tighten it; 4. Loosen the screws on the left side of the transmission to add new fluid. Models under BMW include: BMW 5 Series, BMW X3, BMW X4, BMW 1 Series, BMW X7, etc. Taking the BMW 5 Series as an example, it belongs to the mid-to-large-sized car category, with body dimensions of: length 5106mm, width 1868mm, height 1500mm, a wheelbase of 3105mm, and a fuel tank capacity of 68 liters.
Speaking of BMW transmission fluid replacement, I've learned from years of driving experience. Initially, I thought the transmission was sealed and didn't require fluid changes. However, after delaying until 100,000 kilometers, the car started jerking badly during acceleration, and gear shifts became rough even on highways. A later inspection at the shop revealed the fluid had turned black like sludge, with contaminants causing significant internal wear. The mechanic explained that BMW transmissions are precision-engineered—the fluid not only lubricates but also cools and prevents rust. Over time, fluid degradation increases friction coefficients. Frequent stop-and-go city traffic accelerates transmission wear. Regular fluid changes protect gear components and extend vehicle lifespan. The manual recommends replacement every 60,000–80,000 km or six years, but I proactively service mine every 50,000 km. It's a small investment that prevents costly overhauls—money well spent for peace of mind.
