2017-2020 Volkswagen Golf 4 Door Checking and refilling -> Brake fluid User Manual
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Checking and refilling -> Brake fluid for Your Volkswagen Golf 4 Door Seventh Generation (2017-2020)

Screw the lid tightly.  
Even in an emergency, do not use any other kind of coolant additive if engine coolant that meets Volkswagen specifications ( Engine coolant specificationsꢀ)  
is not available! Instead, add distilled water onlyꢀ. As soon as possible, have the correct coolant ratio restored using engine coolant that meets  
Volkswagen specifications Engine coolant specificationsꢀ.  
WARNING  
Hot steam and hot engine coolant can cause serious burns.  
Never open the hood if you see steam or coolant escaping from the engine compartment. Always wait until you no longer see or hear steam or coolant  
escaping from the engine.  
Always let the engine cool down completely before carefully opening the hood. Hot components will burn skin on contact.  
When the engine has cooled down and you are ready to open the hood:  
Firmly apply the parking brake and shift the transmission into Park (P) (automatic) or Neutral (manual only).  
Take the vehicle key out of the ignition.  
On vehicles with Keyless Access, make sure that the remote control vehicle key is out of range of the vehicle and that the vehicle cannot be started by  
depressing the starter button Starter buttonꢀ.  
Always keep children and others away from the engine compartment and never leave them unsupervised.  
The engine coolant system is under pressure when the engine is hot. Never unscrew the coolant expansion tank cap when the engine is hot. Hot coolant  
can spray out and cause severe burns and other serious injuries.  
Turn the cap slowly and very carefully in a counterclockwise direction while applying light downward pressure on the top of the cap.  
Always protect your face, hands, and arms from hot escaping coolant or steam by covering the cap with a large, thick rag.  
Never spill fluids on the engine or exhaust system when refilling. Spilling fluids onto hot parts of the engine or exhaust system can cause a fire. Under some  
conditions, the ethylene glycol in engine coolant can catch fire.  
NOTE  
Use distilled water only when adding coolant! All other types of water contain chemical compounds that can cause extensive corrosion damage to the  
engine. This can even lead to engine failure. If you have added non-distilled water, take the vehicle immediately to an authorized Volkswagen dealer or an  
authorized Volkswagen Service Facility to have the coolant system drained, flushed, and refilled completely with the proper coolant.  
Refill engine coolant only up to the top edge of the marked fill range Fig. 213ꢀ. Excess engine coolant may be forced out of the engine cooling system  
when it gets hot and cause damage.  
In the case of significant engine coolant loss, refill engine coolant only when the engine is completely cooled down. Significant engine coolant loss is a sign  
of leaks in the cooling system. Have the engine cooling system checked immediately by an authorized Volkswagen dealer or an authorized Volkswagen  
Service Facility. Otherwise the engine may be damaged!  
Do not refill engine coolant if there is no coolant in the expansion tank. Air could enter the cooling system. Do not drive the vehicle! Seek expert  
assistance. Failure to do so can result in engine damage.  
When changing or topping off operating fluids, make sure that you pour the fluids into the correct reservoirs. Serious malfunctions and engine damage can  
result if you pour operating fluids into the wrong reservoir.  
Brake fluid  
Fig. 215 In the engine compartment: Brake fluid reservoir cap (cap design may vary depending on vehicle equipment).  
Brake fluid absorbs water from the air over time. Too much water in the brake fluid will damage the brake system. Water also lowers the boiling point of the brake  
fluid. Too much water in the brake fluid can cause vapor lock during heavy brake use or hard braking. Vapor lock reduces braking performance, increases stopping  
distances and can even cause total brake failure. Your safety and the safety of others depends on brakes that are working properly at all times ꢀ.  
Brake fluid specifications  
Volkswagen has developed a special brake fluid that is optimized for the brake system in your Volkswagen. Volkswagen recommends that you use brake fluid that  
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expressly conforms to quality standard VW Standard 501 14 for optimum performance of the brake system. Check the information on the container for the brake  
fluid you want to use to make sure it meets the requirements for your vehicle.  
Brake fluid that complies with VW Standard 501 14 can be purchased from your authorized Volkswagen dealer or authorized Volkswagen Service Facility.  
If this special brake fluid is not available you may – under these circumstances – use another high quality brake fluid that complies with U.S. Federal Motor Vehicle  
Safety Standard (FMVSS) 116 DOT 4 ꢀ.  
Please note, however, that not all brake fluids that comply with U.S. Federal Motor Vehicle Safety Standard (FMVSS) 116 DOT 4 have the same chemical  
composition. Some of these brake fluids can contain chemicals that could, over time, degrade or damage internal parts of the vehicle’s brake system.  
Volkswagen therefore recommends that you use brake fluid that expressly complies with VW Standard 501 14 for optimum brake system performance over the  
long term.  
Brake fluid level  
The fluid level in the transparent brake fluid reservoir must always be between the MIN and MAX marking  
ꢀ.  
On some vehicles, engine components may partially block the view of the brake fluid reservoir and make it impossible to see the brake fluid level. If you cannot  
clearly see the brake fluid level in the brake fluid reservoir, please see an authorized Volkswagen dealer or authorized Volkswagen Service Facility.  
The brake fluid level drops slightly when the vehicle is being used as the brake pads wear and the brakes are automatically adjusted.  
Changing brake fluid  
Brake fluid must be changed according to the service schedule in your Booklet Warranty and Maintenance,. Have the brake fluid checked by an authorized  
Volkswagen dealer or an authorized Volkswagen Service Facility. Refill only with new brake fluid that meets the standards listed above.  
WARNING  
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 Booklet Warranty 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  
Brake fluid is poisonous.  
To reduce the risk of poisoning, never use food, beverage or other non-original containers to store brake fluid. Someone might be misled by the original  
label on the container, or by the shape of the container, and drink the brake fluid. This could occur even if you relabel the container as brake fluid.  
Only store brake fluid in the closed, original container and keep it out of the reach of children.  
NOTE  
Brake fluid will damage vehicle paint, plastic parts, and tires. Wipe any brake fluid off vehicle paint and other vehicle parts immediately.  
Brake fluid can pollute the environment. Brake fluid that has leaked out must be collected and disposed of properly, following all applicable environmental  
regulations.  
Vehicle battery  
Introduction to the subject  
In this chapter you will find information on the following subjects:  
Warning lightꢀ  
Checking the vehicle battery electrolyte level ꢀ  
Charging, replacing, disconnecting, and connecting the vehicle battery ꢀ  
The standard 12 Volt vehicle battery is part of the vehicle electrical system.  
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