How Often Should the Brake Fluid in a Passat Be Changed?
2 Answers
Passat transmission fluid should be changed every 50,000 to 60,000 kilometers or every 2 years. It is recommended to check the brake fluid every 4 years or replace it every 60,000 kilometers. Function of Transmission Fluid: Transmission fluid not only lubricates and protects the transmission but also facilitates power transmission, gear cooling, cleaning, and rust prevention. Compared to engine oil, transmission fluid has better fluidity and is less viscous. Function of Brake Fluid: The working pressure of brake fluid during braking is 2MPa, and it can reach up to 4-5MPa. All liquids have the characteristic of being incompressible. In a sealed container or a liquid-filled pipeline, when pressure is applied to the liquid, it quickly and uniformly transmits the pressure to all parts of the liquid. Hydraulic braking operates based on this principle. After being used for a certain period, brake fluid is prone to a lower boiling point, contamination, and varying degrees of oxidation and deterioration.
The replacement interval for the brake fluid in a Passat is typically every two years or 40,000 kilometers, whichever comes first. As a Passat owner, I find this recommendation quite reasonable because brake fluid absorbs moisture from the air, and once its boiling point decreases, braking performance deteriorates. This is especially dangerous during rainy weather or long-distance driving, where you might experience soft or delayed braking. I check the brake fluid reservoir every six months, popping the hood to ensure the fluid level is between Min and Max. The normal color should be clear and transparent; if it turns black or cloudy, it’s time for a change. Pay attention to driving conditions too—frequent braking in congested city traffic can age the fluid faster. Don’t delay this maintenance task; get it done professionally for peace of mind. After all, when it comes to driving, safety is paramount, and cutting corners is never an option.
