Get Fuel and emissions control system -> Fuel types and refueling Guide for Volkswagen Tiguan 4 Door Third Generation (2024-2025)

Fuel and emissions control system

Safety precautions for handling fuel

WARNING

Handling fuel incorrectly can cause explosions, ﬁres, severe burns, and other injuries.

Before refueling, switch off the engine, the ignition and your cell phone, as well as other radio equipment.

To reduce the risk of discharging static electricity, do not enter the vehicle while refueling.

Make sure that the fuel tank cap is sealed correctly and no fuel is leaking out.

Note the applicable safety precautions and local regulations for handling fuel.

WARNING

Refueling incorrectly can cause ﬁres, serious or fatal injuries, and vehicle damage.

Only use fuel that is approved for your vehicle.

Do not use any fuels containing metal and only use service additives approved by Volkswagen in the respective

proportion.

Immediately remove any fuel that has spilled on vehicle components.

CAUTION

Fuel may leak out of reserve canisters and ignite. This can cause ﬁres and injuries.

Do transport any reserve canisters in the vehicle.

Fuels can contaminate the environment. Collect any leaking operating ﬂuids and dispose of them according to legal

regulations.

The fuel filler flap does not have an emergency release. If necessary, contact an authorized Volkswagen dealer or

authorized Volkswagen Service Facility for assistance.

Fuel types and refueling

Introduction

The fuel ﬁller ﬂap is located on the right rear side of the vehicle.

Designation of fuels and fuel standards

Refer to ⇒

and

Safety precautions for handling fuel .

405

Fig. 183 On the inside of the fuel filler flap: fuel label (general example)

Fuel label

The type of fuel to use depends on the vehicle engine. When your vehicle leaves the factory there is a fuel information sticker

inside the tank ﬂap with notes about the minimum required fuel type for your vehicle ﬁg. 183.

The name speciﬁes which fuels are suitable for the vehicle. This is a minimum requirement. The vehicle must not be refueled

with fuels of lower quality or other fuel types ⇒

.

Fuel standards

The fuel used must meet one of the following standards. The vehicle must not be refueled with other fuels ⇒

.

If fuel with the speciﬁed standards is not available, contact suitably qualiﬁed professionals for information about which fuels

are suitable for the vehicle. Volkswagen recommends contacting an authorized Volkswagen dealer or authorized Volkswagen

Service Facility.

Gasoline

Gasoline and methanol mixture

AKI 87 or higher.

Maximum 3% methanol.

Gasoline and ethanol mixture

AKI 87 or higher.

Maximum 15% ethanol.

Gasoline and MTBE mixture

AKI 87 or higher.

Maximum 15% MTBE.

NOTICE

Refueling with non-standard and non-approved fuels can cause reduced performance and considerable damage to the

engine and the fuel system.

Before refueling, check if the fuel to be used corresponds the label on the fuel pump.

406

Only use fuel that conforms to the speciﬁed standard and label.

Gasoline

Refer to ⇒

and

Safety precautions for handling fuel .

Gasoline types

The gasoline types differ in terms of their Anti-Knock Index (AKI) speciﬁcation, which is given from the formula

(RON+MON) / 2, or the Research Octane Number (RON) speciﬁcation. The vehicle may also be fueled with gasoline that has

a higher AKI or RON than what is required by the engine. However, this will not improve fuel consumption or engine power.

The fuel label may include multiple types of gasoline, e.g. AKI 93 (AKI min. 91). The highlighted gasoline type, AKI 93 in this

example, is the preferred gasoline type for which the vehicle is designed and optimized. The listed alternative gasoline type,

AKI 91 in this example, should only be used if the preferred type, AKI 93 in this example, is not available.

If your vehicle has a gasoline engine, fuel it only with gasoline that does not contain any metal (no lead, manganese or iron)

⇒

.

The most frequently purchased gasoline types in the USA and Canada have the following octane values, which are normally

listed on the fuel pump:

Regular (normal gasoline): AKI 87 to 90 or RON 91.

Premium (super gasoline): AKI 91 to 93 or RON 95.

Volkswagen recommends using “TOP TIER Detergent Gasoline”, which is available in some regions, for example North

America, Central America and South America. For more information on “TOP TIER Detergent Gasoline”, visit the ofﬁcial

website at:

https://www.toptiergas.com

NOTICE

The use of gasoline that does not meet the minimum requirements for the octane number can impair engine performance.

The use of poor-quality gasoline or gasoline with an AKI of under 87 or a RON of under 91 can cause engine damage.

Only fuel with gasoline that meets or exceeds the speciﬁed octane number, Research Octane Number (RON) or

Anti-Knock Index (AKI).

Refueling

Refer to ⇒

and

Safety precautions for handling fuel .

407

Fig. 184 Behind the fuel filler flap: fuel tank cap (general example)

Refueling procedure

1. To unlock the fuel ﬁller ﬂap, unlock the vehicle with the

button on the remote control vehicle key ⇒ Vehicle key

functions.

Or: to unlock the fuel ﬁller ﬂap, unlock the vehicle with the

button in the driver door ⇒ Central locking button.

On vehicles with Keyless Access, the fuel ﬁller ﬂap is automatically unlocked when the vehicle is unlocked.

2. Open the fuel ﬁller ﬂap.

3. Remove the fuel tank cap and insert it into the opening at the fuel ﬁller ﬂap provided for this ﬁg. 184.

4. Insert the nozzle into the fuel ﬁller neck and start the refueling process.

Hold the fuel pump nozzle handle down to ensure optimum refueling.

The fuel tank is full once the fuel pump nozzle turns off for the ﬁrst time ⇒

5. Screw the fuel tank cap onto the fuel ﬁller neck.

6. Close the fuel ﬁller ﬂap.

.

Do not continue ﬁlling after disconnection. The expansion area in the fuel tank may ﬁll with fuel, e.g. due to heating. This may

mean that the fuel overﬂows or the automatic ventilation process cannot work ⇒ Troubleshooting.

WARNING

Fuel may spray out and overﬂow if the fuel tank is overﬁlled. This can cause explosions, ﬁres, and serious or fatal injuries.

Do not continue ﬁlling after the pump nozzle switches off for the ﬁrst time.

NOTICE

If the tank content is not consumed up to the reserve quantity at regular intervals, it may not be possible to maintain the

fuel quality and system function required for driving, under certain circumstances.

At least every six months, only refuel when the warning light

turns on.

408

Fuels can contaminate the environment. Collect any leaking operating ﬂuids and dispose of them according to legal

regulations.

Exhaust system

Introduction

The exhaust-relevant components reduce exhaust emissions:

Catalytic converter ⇒ Catalytic converter.

Particulate ﬁlter (depending on the vehicle equipment) ⇒ Particulate ﬁlter.

WARNING

If the engine runs in enclosed spaces, poisonous gases may enter the vehicle interior. This can cause serious injuries and

death due to asphyxiation.

Never start the engine in conﬁned spaces.

Do not allow the engine to run in conﬁned spaces.

Do not leave your vehicle unattended while the engine is running.

WARNING

The parts of the exhaust system become very hot and can ignite ﬂammable materials, for example shrubs, leaves, dry

grass or spilled fuel. This can lead to a ﬁre and cause accidents and serious or fatal injuries.

Never park the vehicle in such a way so that the exhaust system components come into contact with ﬂammable

materials under the vehicle.

Never use additional undercoating or corrosion protection for exhaust pipes, catalytic converters, heat shields, or

particulate ﬁlters.

Catalytic converter

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

handling fuel.

and

Safety precautions for

To ensure that the exhaust system and the engine catalytic converter can work correctly for a long time, observe the following

Only refuel with fuel permitted for the vehicle.

Never drive until the fuel tank is completely empty ⇒ Refueling.

Never add too much engine oil ⇒ Checking the engine oil level and adding oil .

Do not tow-start the vehicle; use jump-start assistance instead ⇒ Preparing and Performing a Jump-start.

If there are engine misﬁres, loss of power, or poor engine operation while driving, reduce the speed immediately and have the

vehicle checked by suitably qualiﬁed professionals ⇒ Troubleshooting. Volkswagen recommends contacting an authorized

Volkswagen dealer or authorized Volkswagen Service Facility. Otherwise, uncombusted fuel could be present in the exhaust

system and then enter the atmosphere. The catalytic converter may also be damaged from overheating.

The exhaust may smell like sulfur when the emissions control system is running correctly.

Particulate ﬁlter

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Fuel and emissions control system -> Fuel types and refueling for Your Volkswagen Tiguan 4 Door Third Generation (2024-2025)

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