![]() ![]() ![]() Pop the hood and locate the brake fluid reservoir, beneath a plastic cover on the driver’s side of the vehicle. Where is the brake fluid reservoir on a BMW 3 Series? When Should I Have My Brake Fluid Flushed? – Most manufactures suggest a brake fluid flush every two years, but there are other signs that your brakes need attention. BRAKE FLUID DOT 4 is ideal for hydraulic disc brakes and drum brakes on motorcycles, cars, commercial vehicles and machines. What brake fluid do I need for my BMW 3 Series?īRAKE FLUID DOT 4 is a state-of-the-art, high-performance, premium brake fluid of outstanding quality, with a high wet boiling point and thus extreme safety reserve against vapour lock. Boiling points are the most critical aspect of brake fluid to keep an eye on. DOT 3, DOT 4 and DOT 5.1 are all interchangeable. Only use DOT 5 in a completely dry system or in a vehicle that already has DOT 5 in the system. Can you mix DOT 3 and DOT 5 brake fluid?ĭo not mix these fluids. DOT 4 brake fluid has higher dry and wet boiling points, making it safer for higher temperatures. The primary differences between the two include the following: DOT 3 brake fluid will absorb less water than DOT 4 from the air over time, meaning you’ll need to have your fluid changed less frequently. Don’t mix glycol based and silicone based fluids (ie don’t mix DOT 5 with any other rating) What is the difference between DOT 3 and DOT 4 brake fluid? Can you mix DOT 4 and DOT 4 Synthetic brake fluid?ĭon’t mix the DOT ratings, unless you’re adding a higher rating resulting in a raised boiling point. Make sure to not mix DOT 3 and/or DOT 4 with DOT 5 brake fluid as the latter is silicone-based. What happens if you mix DOT 3 and DOT 4 brake fluid?Ĭan You Mix DOT 3 And DOT 4? What is this? As both DOT 3 and DOT 4 brake fluids are glycol-based, they can be mixed without a problem but keep in mind that the boiling points will change. ![]()
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