How often should the brake fluid be changed for an Audi A4L?
3 Answers
Audi A4L brake fluid should generally be replaced every 20,000 kilometers or every two years. Over time, the rubber cups and pistons in the brake pump may wear out, causing the brake fluid to become contaminated, so it should be replaced promptly. The Audi A4L features a completely new exterior and chassis design, with the front and rear resembling the Audi A5. The interior of the Audi A4L continues the Audi family design, with exquisite craftsmanship and high-quality materials. A large number of parts shared with the A6L can be found on the dashboard. In terms of body dimensions, the Audi A4L measures 4761mm in length, 1826mm in width, and 1439mm in height.
Last time I asked my mechanic friend when to change the brake fluid for my Audi A4L, he said it's generally recommended every two years or 30,000 kilometers, whichever comes first. Brake fluid gradually absorbs moisture from the air, and over time its boiling point decreases. During emergency braking, this can cause bubbles to form, leading to a spongy brake pedal or even brake failure. Personally, I make it a habit to change it at the dealership every two years, which costs around 500 yuan. During inspection, the technician uses a test pen to check the moisture content—if it exceeds 3%, it's time for a change. When driving, pay attention if the brake response slows down or if the fluid in the reservoir appears dark and cloudy, as these are signs that immediate action is needed. Don’t overlook this—safety comes first, and regular maintenance can also prevent costly repairs due to corrosion in the brake system. Keeping up with maintenance ensures sharper braking performance, especially in rainy conditions or during high-speed driving, giving you greater peace of mind.
I've been driving this Audi A4L for several years, and my experience is that changing the brake fluid more frequently is always a good idea. I recommend replacing it every two to three years or after 30,000 kilometers, depending on your usage. If you're stuck in traffic every day with frequent braking, or live in a rainy area, the fluid absorbs moisture faster. My friend delayed changing it for three years and ended up with a 'spongy' brake feel. During maintenance, ask the technician to test the moisture content, and you can also check the fluid level in the reservoir yourself—top it up with fresh fluid if it's low. DOT4 brake fluid is the standard choice, and the replacement process is simple, taking only about half an hour. The key is not to skimp or delay—if the brakes fail, the repair costs are high and the situation is dangerous. Once you make it a habit, driving feels much more reassuring, and it's a good opportunity to check the wear on your brake pads as well.
