Volkswagen Golf GTI 2016, Owner'S Manual

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Brake failure and reduced brake performance can be caused by
not having enough brake fluid in the reservoir or by old or
incorrect brake fluid.
Check the brake system and brake fluid level regularly.
Always change the brake fluid according to the service
schedule in your ⇒ BookletWarranty and Maintenance, .
Hard braking with old brake fluid may cause vapor lock. Vapor
lock reduces braking performance, increases stopping
distances and can even cause total brake failure.
Always make sure that only the correct brake fluid is used.
Only use brake fluid that expressly conforms to VW Standard
501 14 or, if it is not available, only use a high-quality brake
fluid that conforms to U.S. Standard FMVSS 116 DOT 4
requirements.
Using another brake fluid, or one that is not of high quality, can
impair the function of the brake system and reduce its
effectiveness. If the container does not say that the brake fluid
complies with VW Standard 501 14, or U.S. Standard
FMVSS 116 DOT 4, do not use it.
The brake fluid must be new.
WARNING