ŠKODA Superb fuel pump fuse: location, replacement and fault diagnosis

Owners ŠKODA Superb Often we are faced with a situation where the car suddenly stalls or refuses to start - while the starter turns, but the engine does not catch. In 70% of such cases the culprit is fuel pump fuse, which burns out due to power surges, short circuits or natural wear and tear. This part costs a penny, but its failure paralyzes the operation of the fuel system.

The problem is complicated by the fact that on different generations Superb (B5, B6, B7, B8) the fuse is located in different blocks, and its numbers and ratings are different. In this article we will look at exact installation locations for each body, we will learn how to check the fuse without a multimeter, and show how to avoid common mistakes when replacing. You will also find out why on diesel versions Superb 2.0 TDI The fuel pump fuse is often confused with a relay, and how this can damage the fuel line.

Where is the fuel pump fuse on a ŠKODA Superb: diagrams for all generations

The location of the fuse depends on the year of manufacture and body type. Below is the current data for all generations, including restyled versions.

On Superb I (B5, 2001–2008) and Superb II (B6, 2008–2015) The fuel pump fuse is located in main fuse box under the hood (to the left of the battery). On Superb III (B7, 2015–2023) and Superb IV (B8, from 2023) he was moved to salon unit under the steering wheel. Important: on diesel versions the circuit is different - the fuse can be duplicated in the relay block under the rear seat.

• 🔧 Superb B5 (2001–2008): Fuse F35 (15A) in the engine compartment. Color - blue.
• 🔧 Superb B6 (2008–2015): Fuse S107 (20A) in the interior unit (under the steering column). Color - yellow.
• 🔧 Superb B7/B8 (2015–present): Fuse SC30 (15A) in the block under the glove compartment. Color - blue.
• ⚠️ Diesel versions (1.9 TDI, 2.0 TDI): Additional relay J17 in the block under the rear seat (on the left).

Generation	Fuse number	Denomination (A)	Block location	Color
Superb B5 (2001–2008)	F35	15	Under the hood (to the left of the battery)	Blue
Superb B6 (2008–2015)	S107	20	Salon (under the steering wheel)	Yellow
Superb B7/B8 (2015–present)	SC30	15	Salon (under the glove compartment)	Blue
Diesel 2.0 TDI	J17 (relay)	—	Under the back seat	Black

⚠️ Attention: On Superb B6 with engines 1.8 TSI and 2.0 TSI The fuel pump fuse can be duplicated in the block SB29 (10A) - this is due to the characteristics of the injection system FSI. If after replacement S107 The problem remains, check this fuse as well.

Signs of a faulty fuel pump fuse: how to distinguish it from a breakdown of the pump itself

A blown fuse manifests itself unambiguously, but its symptoms are often confused with fuel pump malfunction, relay or postings. Here are key signs that will help differentiate the problem:

• ⚡ Engine won't start, but the starter turns. At the same time, there is no sound of the fuel pump operating (there is no characteristic buzzing under the rear seat when the ignition is turned on).
• ⚡ The car stalls while driving and it won't start anymore. This is typical when the fuse blows after the engine has started.
• ⚡ Problems with hot starting. The fuse may overheat and fail at high temperatures in the engine compartment.
• ⚡ Error P0190 or P0191 on diagnostics (insufficient pressure in the fuel rail).

🔍 How to distinguish a fuse from a faulty pump?

1. Check if there is voltage at fuel pump connector (12V when ignition is turned on). If not, the fuse or relay is at fault.
2. Listen, is the pump working? when turning the key. If there is no buzzing, but there is voltage, the pump is broken.
3. Check fuse visually: burnt out has a broken thread or a melted body.

⚠️ Attention: If after replacing the fuse it blows again, do not install a fuse of a higher rating (for example, 25A instead of 15A). This may lead to fire in the fuel line or failure of the electronic control unit (ECU). In such cases, look short circuit in the wiring or malfunction of the pump itself.

Step-by-step instructions: how to check and replace the fuel pump fuse

Replacing a fuse is a simple operation but requires care. Below are universal instructions for all generations Superb, taking into account the nuances.

1. Preparation

• 🔌 Disable battery weight (negative terminal).
• 🔦 Take a flashlight - fuse boxes are often poorly lit.
• 🛠️ Prepare tweezers or special pliers for removing fuses.

2. Finding the fuse box

Depending on generation:

• Superb B5/B6: Open the hood, the unit is located to the left of the battery (under the plastic cover).
• Superb B7/B8: Remove the cover under the glove compartment (unsnap the 2 latches).

3. Removing and checking the fuse

Inspect the fuse for melting or broken filament|

Ring the multimeter in the “dialing” mode (resistance should be ~0 Ohm) |

Check the voltage at the contacts of the unit (should be 12V when the ignition is on) |

Make sure the new fuse is the same rating -->

🔧 How to remove a fuse without tweezers? You can use a thin screwdriver or even a paperclip, but be careful not to damage adjacent fuses.

4. Installing a new fuse

Insert new fuse all the way, making sure it fits snugly into the socket. After replacement:

1. Connect the battery ground.
2. Turn the ignition key to position ON (without starting the engine).
3. Listen to see if the fuel pump is working (you should hear a whirring noise under the rear seat).
4. Start the car.

⚠️ Attention: If after replacement the fuse blows again, do not try to start the car again. This may indicate:

• Short circuit in the fuel pump wiring.
• Malfunction of the pump itself (jammed rotor).
• Problems with the fuel pump relay (located next to the fuse).

Typical mistakes when replacing a fuel pump fuse

Even experienced car owners make mistakes that lead to repeated breakdowns or damage to electronics. Here are the most common:

• 🔥 Installing a larger fuse. For example, instead of 15A they put 20A or 25A. It's threatening fire in the fuel system.
• 🔌 Ignoring relay checks. Fuel pump relay (usually J17 or J49>) often fails at the same time as the fuse.
• 🛠️ Incorrect fuse removal. Using a screwdriver without insulation may cause a short circuit.
• 📋 Lack of diagnostics after replacement. If you do not check the voltage at the pump connector, you may miss a short circuit.

What happens if you install a fuse of the wrong rating?

For example, instead of 15A, install 25A? At best, the fuel pump wiring will burn out. At worst, the fuel filter or line will overheat and ignite. On Superb B7 with the system Start-Stop this can damage the engine control unit (ECU), since it is connected to the fuel pump circuit.

🔍 How to avoid mistakes?

1. Always use a safety lock same denomination and color, which is the original one.
2. Before replacement disconnect battery groundto avoid short circuit.
3. If the fuse blows again, check relay and wiring multimeter.

How to check the fuel pump fuse without a multimeter

Not everyone has a tester at hand, but you can check the fuse using improvised means. Here are 3 reliable methods:

1. Visual inspection

A blown fuse has:

• 🔍 Broken metal thread inside.
• 🔥 Melted or blackened body.
• 💥 A swollen plastic cover (in case of severe overheating).

2. Check for spark

🔌 Carefully (at your own peril and risk!) You can check the fuse by briefly touching its contacts with the wires from the battery (plus to one contact, minus to the other). If the fuse is good, there will be a weak spark. We do not recommend this method for beginners!

3. Replacement with a known good one

Take a fuse of the same rating from another circuit (for example, from a cigarette lighter or radio) and temporarily install it in place of the “suspect”. If the fuel pump works, the problem is confirmed.

⚠️ Attention: On Superb B8 with the system Keyless Do not use the "spark test" method - this may damage the immobilizer.

Frequently asked questions about the ŠKODA Superb fuel pump fuse

🔧 Why does the fuel pump fuse blow again after replacement?

This indicates short circuit in the chain. Reasons:

• Damaged wire insulation under the rear seat (often rubbed against the body).
• Faulty fuel pump (a jammed rotor creates increased load).
• Problems with the fuel pump relay (the contacts could be stuck).

🔍 Diagnostics: Disconnect the fuel pump connector and check if the fuse blows without load. If yes, look for a short circuit in the wiring. If not, the pump is at fault.

🚗 Is it possible to drive without a fuel pump fuse by temporarily closing the contacts?

Absolutely not! This is tantamount to installing a bug and is fraught with:

• Overheating and melting of wiring.
• Fire in the fuel tank.
• Failure of the engine ECU (on Superb B7/B8 it is connected to the pump circuit).

💡 Workaround: If you urgently need to get to a service station, you can install a 10A fuse (for example, against dimensions), but drive no faster than 60 km/h and without sudden acceleration.

🔋 Which fuse controls the fuel pump on the ŠKODA Superb 1.8 TSI?

On Superb B6/B7 with engine 1.8 TSI Responsible for the fuel pump:

• Main fuse: S107 (20A) in the cabin unit.
• Additional fuse: SB29 (10A) - protects the pump control circuit.

⚠️ If it burns out SB29, check fuel pressure sensor (located on the ramp). Its malfunction often leads to voltage surges.

🛠️ Do I need to remove the rear seat to replace the fuse?

No, fuel pump fuse located in the fuse box (under the hood or in the passenger compartment), and not near the pump. However, if the problem is relay (on diesel versions), it may need to be removed from the unit under the rear seat.

🔧 How to remove the back seat Superb B7:

1. Open the back door and locate the seat hinge.
2. Pull the loop up and the seat will release.
3. Lift the seat and slide it forward.

💰 How much does a fuel pump fuse cost and where can I buy it?

The cost of the fuse is from 50 to 200 rubles (depending on denomination and brand). You can buy:

• In any auto store (for example, IXORA, AutoDetail).
• On AliExpress (fuse sets with tweezers).
• At dealerships ŠKODA (original article - N 908 132 01 for 15A).

💡 Tip: Buy fuses as a spare - they often fail on the road. It is optimal to have a set of ratings: 5A, 10A, 15A, 20A.