Get 12-volt vehicle battery -> Troubleshooting Guide for Volkswagen Polo SUV Seventh Generation (2021-2025)

The ventilation opening of the 12-volt vehicle battery must always be on the negative terminal side: the ventilation opening on the

positive terminal side must always be sealed →

Only maintenance-free 12-volt vehicle batteries compliant with the standards TL 825 06 and VW 7 50 73 should be used. These

standards must be dated October 2014 or later.

The 12-volt vehicle battery must always be replaced by a workshop qualified to do this, as the vehicle electronics must be adapted as

part of the replacement process. Only suitably qualified workshops have the technology required to carry out this adjustment and also

the correct replacement batteries.

Disconnecting the 12-volt vehicle battery

Please note the following if the 12-volt vehicle battery has to be disconnected from the electrical system in the vehicle:

1. Switch all electrical consumers off.

2. Unlock the vehicle before disconnecting the battery in order to avoid triggering the anti-theft alarm.

3. First disconnect the negative cable and then the positive cable →

Connecting the 12-volt vehicle battery

Please observe the following if the 12-volt vehicle battery has to be connected to the electrical system in the vehicle:

1. Switch all electrical consumers off.

2. First reconnect the positive cable and then the negative cable →

Various indicator lamps may light up after the 12-volt vehicle battery has been connected and the ignition is switched on. They will go

out if you drive a short distance at a speed of around 15 km/h to 20 km/h (around 10 mph to 12 mph). If the indicator lamps stay lit,

the vehicle should be checked by a suitably qualified workshop. Volkswagen recommends using an authorised Volkswagen repairer.

If the 12-volt vehicle battery was disconnected for an extended period, the system may not able to calculate or correctly display the

time when the next service is due (→ Service interval display). Observe the maximum permissible service intervals .

Vehicles with starter button: Perform the following actions if the ignition cannot be switched on after connecting the 12-volt vehicle

battery:

1. Lock and unlock the vehicle from the outside.

2. Try to switch on the ignition again.

3. Please seek expert assistance if the ignition cannot be switched on.

Automatic switch-off for electrical consumers

If the ignition is switched on for an extended period when the engine is switched off or the exterior lighting is switched on for a long

time when the vehicle is parked, the intelligent onboard supply management system cannot always prevent discharge of the 12-volt

vehicle battery.

If the 12-volt vehicle battery is subject to high loads, the intelligent onboard supply management system automatically performs

various measures to prevent discharge of the 12-volt vehicle battery.

—The idling speed is increased so that the alternator provides more electricity.

—The performance of large electrical consumers may be reduced or they may be switched off completely.

—The power supply to the 12-volt socket may be interrupted briefly while the engine is being started.

Discharge of 12-volt vehicle battery

It may not be possible to start the engine if the battery is discharged. The 12-volt vehicle battery is discharged in the following

situations:

—By long standing periods without running the engine, especially if the ignition is switched on.

—Through use of electrical consumers when the ignition is switched off.

WARNING

Use of a 12-volt vehicle battery that does not have the same specifications and dimensions as the factory-fitted 12-volt vehicle

battery can lead to short circuits or cause a fire. This can result in serious or fatal injuries.

● Always use a maintenance-free and leak-proof 12-volt vehicle battery that has the same specifications and dimensions as the

factory-fitted 12-volt vehicle battery.

WARNING

Improper mounting of 12-volt vehicle batteries can lead to short circuits or cause a fire. This can result in serious or fatal injuries.

● Always secure the 12-volt vehicle battery at the mounting points provided in the vehicle.

● Fit all covers necessary for the vehicle on the battery again.

WARNING

A highly explosive mixture of gases is given off when the 12-volt vehicle battery is being charged. Sparks or naked flames can ignite

the explosive gas mixture. This can result in serious burns.

● 12-volt vehicle batteries should only be charged in well-ventilated spaces.

● Keep sparks and naked flames away from the 12-volt vehicle battery.

WARNING

If the hose for the central gas venting system is not correctly secured on the 12-volt vehicle battery, the highly explosive gas mixture

that is produced during vehicle operation can enter the vehicle interior. The explosive gas can ignite and cause serious or fatal

injuries.

● In vehicles with the 12-volt vehicle battery in the vehicle interior or luggage compartment, make sure that the hose for the central

gas venting system is connected properly to the 12-volt vehicle battery. The vent line must always be attached on the negative

terminal side of the 12-volt vehicle battery.

● Always make sure that the opening on the positive terminal side of the 12-volt vehicle battery is sealed.

CAUTION

Discharged 12-volt vehicle batteries can already freeze at temperatures of around 0°C (+32°F). Acid can leak from a 12-volt vehicle

battery that has frozen and then thawed again. This can cause injuries and damage to the vehicle in the long term.

● Never charge a 12-volt vehicle battery which is frozen or has been frozen.

● The 12-volt vehicle battery must be replaced if it has ever frozen.

CAUTION

Incorrectly connected cables can cause a short circuit. This can damage the vehicle electronics system and cause injuries.

● First connect the positive cable and then the negative cable.

NOTICE

If the 12-volt vehicle battery is disconnected or connected when the ignition is switched on or when the engine is running, this can

result in damage to the electrical system and electronic components and electrical malfunction can occur.

● Never connect or disconnect the 12-volt vehicle battery if the ignition is switched on or the engine is running.

NOTICE

If accessories that supply electric power are connected to the 12-volt socket to charge the 12-volt vehicle battery, this can damage

the electrical system and the electronic components and lead to electrical malfunctions.

● Never connect equipment that supplies electric power, such as solar panels or a battery charger, to the 12-volt socket to charge

the 12-volt vehicle battery.

12-volt power supply

The warning lamp lights up red.

Do not drive on! Possible failure of the electrical system.

A message is shown on the instrument cluster display.

1. Stop the vehicle immediately in a safe place.

2. Switch off any electrical consumers that are not required.

3. Stop the engine and switch off the ignition.

4. Seek expert assistance.

When the red warning lamp is lit up, the start/stop system is switched off. The start/stop system will be switched on again

automatically when the engine is restarted.

12-volt power supply

The indicator lamp lights up yellow.

A message with information on the charge level of the 12-volt vehicle battery is shown on the instrument cluster display.

1. Allow the engine to run so that the 12-volt vehicle battery can be recharged.

2. Seek expert assistance if the message about the charge level of the 12-volt vehicle battery does not disappear after a few

minutes in spite of the measures performed.

A message with information on the 12-volt power supply is shown on the instrument cluster display.

1. Seek expert assistance.

When the yellow indicator lamp is lit up, the start/stop system cannot start the engine. When the yellow indicator lamp has gone out,

the charge level of the 12-volt vehicle battery is sufficient for an automatic engine restart.

Wheels are the most heavily loaded and most underestimated parts of a vehicle. Wheels are very important as the narrow tyre surfaces

are the only contact between the vehicle and the road.

The wheels and tyres approved by Volkswagen have been carefully selected.

The service life of tyres is dependent on tyre pressure, driving style, handling and correct fitting.

Wheel rims, tyres and wheel bolts

Wheel rims, tyres and wheel bolts are matched to the vehicle type. If different wheel rims are fitted, the correct wheel bolts with the

correct length and correctly shaped bolt heads must be used. This ensures that the brakes work properly and that the vehicle drives

quietly and safely. For technical reasons, it is not generally possible to use the wheel rims from other vehicles. This can also apply to

wheel rims of the same vehicle type. Always contact a suitably qualified workshop if you wish to change to other tyre and wheel rim

combinations. Volkswagen recommends using an authorised Volkswagen repairer.

The correct wheel bolts must be used for all vehicle types; these bolts must always be tightened with the correct tightening torque

(→ Wheel bolts).

Declaration of conformity for wheels and tyres

Applies only in India: Tyres fitted in the vehicle meet the requirement of BIS and comply with the requirements under the Central Motor

Vehicle Rules (CMVR), 1989.

WARNING

Incorrect handling of wheels can reduce vehicle safety and cause serious accidents and fatal injuries.

12-volt vehicle battery -> Troubleshooting for Your Volkswagen Polo SUV Seventh Generation (2021-2025)

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