Get Checking and filling -> Brake fluid Guide for Volkswagen Tiguan 4 Door 2023

3. Allow the engine to cool.

4. Check the engine coolant level on the Coolant expansion tank ⇒ Checking and ﬁlling engine coolant .

5. If the warning light does not turn off, do not continue driving or let the engine run, even if the engine coolant is at the correct level.

6. Contact an authorized Volkswagen dealer or authorized Volkswagen Service Facility for assistance.

Brake ﬂuid

Introduction

Brake ﬂuid absorbs moisture from the air over the course of time. Too much water in the brake ﬂuid causes damage to the brake system. Water lowers the boiling

point of the brake ﬂuid. If the water content in the brake ﬂuid is too high, vapor lock may form in the brake system during heavy braking and full braking. Vapor lock

reduces the braking efﬁciency, increases the braking distance considerably, and can lead to a total failure of the brake system. Your own safety and the safety of

others on the road depends on your brake system functioning correctly at all times.

WARNING

Brake ﬂuid is poisonous. Contact with brake ﬂuid, especially swallowing brake ﬂuid, may result in serious or fatal injuries.

If you swallow brake ﬂuid, seek urgent medical help.

If you have health problems after working with brake ﬂuid, seek medical help.

Always store brake ﬂuid out of the reach of children and only within the sealed original container.

Never use empty food cans, bottles, or other containers to store brake ﬂuid, because someone could drink the brake ﬂuid by mistake.

Avoid regular contact with brake ﬂuid to prevent damage to your skin.

Protect your skin, face, and particularly your eyes when working with brake ﬂuid.

Do not eat, drink, or smoke when working with brake ﬂuid.

Wash your skin with soap and water after working with brake ﬂuid.

NOTICE

Spilled or leaking brake ﬂuid will damage the vehicle's surfaces. The vehicle's paint, plastic parts, and tires may be damaged.

Immediately wipe up any spilled or leaking brake ﬂuid that comes into contact with vehicle components.

Then rinse all vehicle parts with plenty of water.

Brake ﬂuid can pollute the environment. Collect spilled brake ﬂuid and dispose of it correctly.

Brake ﬂuid speciﬁcations

Please read the introductory information and heed the Warnings and Notice ⇒

Safety precautions for working in the engine compartment .

Volkswagen has developed a special brake ﬂuid that is optimized for the vehicle's brake system. For optimum performance of the brake system, Volkswagen

recommends only using brake ﬂuid that complies with the VW standard 501 14.

Before using brake ﬂuid, check that the brake ﬂuid speciﬁcation on the bottle matches the vehicle requirements.

Brake ﬂuid that complies with the VW standard 501 14 can be obtained from an authorized Volkswagen dealer or authorized Volkswagen Service Facility.

If brake ﬂuid that meets this speciﬁcation is not available and another high-quality brake ﬂuid must therefore be used, brake ﬂuid that complies with the speciﬁcation

DIN ISO 4925 or the US Standard FMVSS 116 DOT 4 CLASS 6 can be used.

Not all brake ﬂuids that comply with the requirements of DIN ISO 4925 or US Standard FMVSS 116 DOT 4 CLASS 6 have the same chemical composition. Some

of these brake ﬂuids can contain chemicals that can destroy or damage components of the vehicle brake system over time.

To help ensure that the brake system functions correctly over the long term, Volkswagen recommends using a brake ﬂuid that expressly conforms to the

VW standard 501 14.

Brake ﬂuid that complies with the VW standard 501 14 meets the requirements of DIN ISO 4925 or the US Standard FMVSS 116 DOT 4 CLASS 6.

Checking the Brake Fluid

Please read the introductory information and heed the Warnings and Notice ⇒

Safety precautions for working in the engine compartment .

Preparations

1. Parking the vehicle on a level, secure surface.

2. Open the hood.

Checking the Brake Fluid Level

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Fig. 208 In the engine compartment: cap on the brake fluid reservoir.

The brake ﬂuid reservoir can be recognized by its cap ﬁg. 208.

The brake ﬂuid level cannot be checked precisely on all models because the hood or engine components may obstruct the view of the ﬂuid level in the reservoir. If

you cannot read the brake ﬂuid level clearly, see an authorized Volkswagen dealer or authorized Volkswagen Service Facility for assistance. Volkswagen

recommends contacting an authorized Volkswagen dealer or authorized Volkswagen Service Facility.

The brake ﬂuid level must always be between the MIN and MAX markings on the brake ﬂuid reservoir

⇒

The brake ﬂuid level decreases slightly when the vehicle is being used as the brake pads wear and the brakes automatically adjust themselves.

WARNING

A low brake ﬂuid level or unsuitable brake ﬂuid may cause the brakes to fail or may reduce braking efﬁciency. Accidents and serious or fatal injuries could result.

Have the brake system and brake ﬂuid level checked regularly.

Be sure to use the correct brake ﬂuid.

Only use brake ﬂuid that expressly complies with the VW standard 501 14.

If brake ﬂuid that complies with the VW standard 501 14 is not available, in exceptions only use a high-quality brake ﬂuid that complies with

DIN ISO 4925 CLASS 6 or US standard FMVSS 116 DOT 4.

Changing brake ﬂuid

Have the brake ﬂuid changed regularly. An authorized Volkswagen dealer or authorized Volkswagen Service Facility can provide information about the interval for

changing the vehicle brake ﬂuid. Only have brake ﬂuid added that meets the required speciﬁcations. Volkswagen recommends contacting an authorized

Volkswagen dealer or authorized Volkswagen Service Facility.

WARNING

Vapor lock may occur in old brake ﬂuid due to absorbed moisture during hard braking, reducing braking efﬁciency and potentially causing total brake failure.

Accidents and serious or fatal injuries could result.

Have the brake ﬂuid changed regularly.

Only have new brake ﬂuid added.

Troubleshooting

Please read the introductory information and heed the Warnings and Notice ⇒

Safety precautions for working in the engine compartment .

Brake ﬂuid level

The red warning light turns on. The brake ﬂuid level is too low.

Do not continue driving! This could result in the brake failing.

1. Stop the vehicle immediately as soon as it is safe to do so ⇒ Parking.

2. Check the brake ﬂuid level.

338

3. If the brake ﬂuid level is too low, contact an authorized Volkswagen dealer or authorized Volkswagen Service Facility.

12 V vehicle battery

Introduction

The 12-volt vehicle battery is a component of the electrical system and serves to supply energy to the vehicle. During maintenance procedures, the 12 V vehicle

battery is checked and replaced if necessary.

You may only perform procedures on the electrical system yourself if you are familiar with the necessary activities and the general safety precautions, and if the

correct operating equipment and ﬂuids and suitable tools are available. Work performed incorrectly can result in serious injuries ⇒

. Have all work performed by

suitably qualiﬁed professionals. Volkswagen recommends contacting an authorized Volkswagen dealer or authorized Volkswagen Service Facility.

Information about warning and indicator lights can be found in the troubleshooting section at the end of the chapter ⇒ Troubleshooting.

Battery switch-off in an accident with triggering of the airbag

In vehicles with a 12 V vehicle battery in their vehicle interior or luggage compartment, the electrical connection to the 12 V vehicle battery is pyrotechnically

disconnected in an accident with airbag deployment. This prevents a short circuit. For more information on the installation location of the vehicle battery, refer to

section → page , Checking the 12 V vehicle battery acid level .

Detailed warnings for the 12 V vehicle battery

Always wear eye protection.

are forbidden. A highly explosive mixture of gases forms when charging the 12 V vehicle battery.

V vehicle battery. Always heed the Owner's Manual.

Battery acid is highly corrosive. Always wear protective gloves and eye protection.

Fire, sparks, open flame, and smoking

Always keep children away from battery acid and the 12

WARNING

Performing work on the 12 V vehicle battery and the electrical system can cause serious injuries, ﬁres, or electric shocks. This could result in serious injuries.

Always read and follow the warning information on the 12 V vehicle battery.

Before performing any work on the 12 V vehicle battery, switch off the ignition and all electrical equipment and disconnect the 12 V battery negative

cable.

Always keep children away from battery electrolyte and the 12 V vehicle battery.

When handling 12 V vehicle batteries, always protect your hands, arms, and face from spraying battery acid.

Always wear eye protection and safety gloves.

Never short circuit the battery terminals.

WARNING

When work is carried out on the 12 V vehicle battery, a highly explosive, ﬂammable gas mixture builds up. Sparks could form and ignite the ﬂammable gas that

is released by the 12 V vehicle battery. This can result in serious injury or death.

Always keep ﬁres, sparks, open ﬂames, and lit cigarettes far away from the 12 V vehicle battery.

Avoid creating sparks when working with wires and electrical equipment or when discharging static electricity.

WARNING

A drained 12 V vehicle battery can freeze at temperatures around 0 °C (+32 °F). Acid may leak out of 12 V vehicle batteries that have frozen and thawed again

and cause damage to the vehicle in the long run.

Never charge a frozen or thawed 12 V vehicle battery.

Always replace the 12 V vehicle battery if it freezes.

WARNING

California Proposition 65 Warning.

This product can expose you to chemicals including lead and lead components, which are known to the State of California to cause cancer and birth

defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.

NOTICE

UV rays can damage the battery housing.

Do not expose the 12 V vehicle battery to direct sunlight for a long period of time.

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Checking and filling -> Brake fluid for Your Volkswagen Tiguan 4 Door 2023

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