Škoda Superb third generation (body B8, including facelift FL) is a car with complex electronics, where even a minor malfunction can disable the entire system. Fuses here play the role of “insurance”: they protect wiring and equipment from short circuits and overloads. But where to look for them if the radio stops working, the headlights don’t light up, or the power window fails?

In this article - detailed fuse box diagrams for Superb 2015–2023, decoding of each element, as well as practical tips for diagnosis and replacement. We'll sort it out unique pitfalls of this model, for example, why the cigarette lighter fuse often blows due to a hidden problem in the 12V sockets or how to distinguish a blown fuse from a faulty relay.

Where are the fuse boxes located in Škoda Superb B8

B Superb third generation provided three main fuse boxes:

  • 🔧 Main unit in the cabin (under the steering wheel, to the left of the pedals) - responsible for most of the electronics.
  • 🚗 Additional block in the trunk (under the floor, next to the battery) - here are fuses for powerful consumers (cooling fan, heated seats).
  • ⚡ Relay and fuse box under the hood (next to the battery) - controls the starter, generator and external lighting circuits.

The easiest way to access the cabin unit is if turn the steering wheel to the left all the way and snap off the plastic cover by hand (no tools needed). In the trunk you will have to remove the hatch cover - it is secured with two latches. Under the hood the unit is covered with a black plastic cover with the inscription FUSES.

📊 Where are your fuses most likely to blow?
  • In the salon block
  • In the trunk
  • Under the hood
  • Never had a problem

Important: on restyled versions (FL, since 2019) the location of the blocks has not changed, but Some fuse ratings may vary (for example, for a system Virtual Cockpit or adaptive cruise control). Always check the sticker on the back of the unit cover!

Diagram and decoding of fuses in the cabin block

Salon block (SB2) - the most “loaded”: fuses for multimedia, lighting, climate control and comfort systems are concentrated here. Below - current-line Superb 2015–2023 (including FL):

Fuse no. Rating (A) What is he responsible for? Notes
F1 10 Keyless entry system (Keyless), immobilizer When the car burns out, the car does not see the key
F10 15 Cigarette lighter, 12V socket in trunk Often lights up due to cheap chargers
F25 20 Climate control unit (Climatronic) If there is a malfunction, the air conditioner stops working
F30 7.5 Multimedia system (Amundsen, Columbus) If it's burned out, the screen won't turn on.
F45 10 Parking sensors (front/rear) If there is a problem, it beeps constantly or does not work

⚠️ Attention: fuse F10 (cigarette lighter) in Superb often fails due to the use of powerful devices (for example, car vacuum cleaners or compressors). If it burns out again, check 12V sockets for short circuit multimeter!

Check visually for a broken thread|Measure the voltage at the 12V socket (should be 12.6V)|Disconnect all devices and try replacing the fuse|If it blows again, look for a short circuit in the wiring-->

Another “weak point” is the fuse. F30 (multimedia). If after replacement the system does not work again, check fuse in the block under the hood (SC17, 30A) — it is responsible for powering the head unit.

Fuse box in the trunk: what's important here

In the luggage compartment Superb block is located SB3, where fuses for powerful consumers are concentrated. There are also relays that control the operation of fans, heated seats and rear lights.

  • 🔥 F1 (50A) — main fuse for the generator circuit. If it burns out, the battery does not charge.
  • ❄️ F10 (30A) — heated rear window. It often fails when the conductive threads are damaged.
  • 💺 F15 (20A) — Heated front seats. If only one side does not work, the problem is in the seat wiring.
  • 🚨 F20 (10A) - Hazard alarm and central locking.

⚠️ Attention: fuse F1 (50A) - critical. If it is burned out, the car may stall while driving due to lack of battery charging. Never replace it with a fuse of a higher rating! This may cause the wiring to catch fire.

To access the unit in the trunk:

  1. Open the trunk and remove the floor (pull the tab next to the spare tire).
  2. Unhook the two latches on the unit cover (it is black).
  3. Use the tweezers supplied with the vehicle to remove the fuses.
How to check a fuse without a multimeter?

If you don’t have a tester at hand, you can visually inspect the fuse using light: the blown thread will be broken. You can also replace a suspicious fuse with a known good one with the same rating (for example, from the cigarette lighter circuit).

Fuse box under the hood: starter, alternator, lighting

Under the hood Superb block is located SC, where fuses and relays for critical systems are concentrated:

  • 🔋 SC1 (100A) — main battery fuse (mega fuse).
  • 💡 SC5 (10A) — left headlight (low beam).
  • 💡 SC6 (10A) — right headlight (low beam).
  • 🔄 SC17 (30A) — multimedia system (amplifier power supply).
  • 🚗 SC20 (20A) — engine control unit (ECU).

⚠️ Attention: Fuses SC5 and SC6 (low beam) are often confused with headlight fuses (SC7/SC8). If the headlights do not light up after replacement, check light relay (K7) in the same block!

To replace fuses under the hood:

  1. Turn off the ignition and remove the negative terminal from the battery.
  2. Press the unit cover latch (located on the right).
  3. Use tweezers or pliers to remove the fuses.
💡

If the headlights do not work after replacing the fuse, check the lamps and contacts in the sockets. Often the problem lies in oxidized contacts or burnt out lamps, and not in the fuse.

Typical faults and how to avoid them

Owners Škoda Superb often encounter repeated blown fuses. Here most common reasons and ways to eliminate them:

  • 🔌 Short circuit in wiring - check the circuit with a multimeter in the “continuity” mode. Wires under seats are especially vulnerable (due to frequent seat movement).
  • 🔥 Circuit overload - for example, using devices with a power >180 W in the cigarette lighter socket (compressors, electric kettles).
  • 💧 Contact corrosion - oxidized terminals increase resistance, which leads to heating and blown fuse.
  • 🔄 Faulty relay - if the fuse is intact, but the device does not work, check the corresponding relay (for example, K7 for headlights).

⚠️ Attention: If the fuse F10 (cigarette lighter) burns out immediately after replacement - do not try to install a “bug” (wire)! This may cause a fire. Instead:

  1. Disconnect all devices from 12V sockets.
  2. Test the circuit for a short circuit.
  3. Check the slots for foreign objects (coins, paper clips).
💡

If the fuse blows repeatedly, the problem is not in it, but in the circuit. Ignoring this rule may result in a vehicle fire!

Another "disease" Superb — Media fuse blown (F30) after connecting non-standard devices (for example, DVRs to CAN bus). In this case, diagnostics of the head unit is required.

Step-by-step instructions: how to replace the fuse correctly

Replacing the fuse in Škoda Superb - a simple procedure, but there are nuances that will help you avoid mistakes:

  1. Turn off the ignition and remove the key from the lock. For the unit under the hood, also disconnect the negative battery terminal.
  2. Find the faulty fuse according to the diagram (on the back of the block cover there is a sticker with an explanation).
  3. Remove the fuse special tweezers (found in the fuse box) or pliers. Do not use metal tools - the contacts may be damaged!
  4. Check the fuse visually or with a multimeter (in the “diagnosis” mode, the resistance should be ~0 Ohm).
  5. Install a new fuse same denomination. Using a high ampere fuse may cause a fire!
  6. Check circuit operation. If the fuse blows again, look for the cause (short circuit, faulty device).

⚠️ Attention: B Superb fuses are used Mini (ATM) and Maxi. Don't confuse them - they are not interchangeable! For example, in the block under the hood there are Maxi fuses (large, square), and in the cabin - Mini.

Disconnect all consumers in the circuit|Check the circuit for short circuits with a multimeter|Inspect the wiring for insulation damage|Check the device connected to the circuit (for example, a radio)-->

If you are replacing a fuse in the under hood block, pay attention to relay K7 (lighting). It often “sticks” due to moisture, which leads to the headlights turning on randomly. The solution is to clean the relay contacts or replace it.

Frequently asked questions about fuses Škoda Superb

Why in mine Superb Is the cigarette lighter fuse constantly on?

This is a typical problem due to:

  • Using powerful devices (compressors, vacuum cleaners) - they consume >15A.
  • Short circuit at 12V socket (check for coins or debris).
  • Malfunctions of the socket itself (oxidized contacts).

Solution: Replace the cigarette lighter socket or use a fused power strip.

Where is the radio fuse located? Superb 2020?

In the salon block (SB2) this is a fuse F30 (7.5A). Also check:

  • SC17 (30A) in the block under the hood (amplifier power supply).
  • Relay K12 in the cabin unit (multimedia control).

If after replacing the radio does not work, reset the settings via Settings → System → Reset.

Is it possible to install a fuse of a higher rating if it constantly blows?

Absolutely not! The fuse is designed for a certain load. If you put, for example, 20A instead of 10A, this can lead to:

  • Melting of wire insulation.
  • Fire of the device board (for example, climate control unit).
  • Short circuit in the circuit.

If the fuse blows again, look for the cause (short circuit, faulty device).

How can you tell if a relay has blown and not a fuse?

Signs of a faulty relay:

  • When turned on, a click is heard, but the device does not work.
  • The relay gets hot or smells burning.
  • Relay contacts are oxidized or burnt.

Check: Swap the relay with a known good one (for example, a fan relay). If the problem has moved, the relay is faulty.

Where to buy fuses for Superb?

Suitable fuses:

  • Mini (ATM) — for the cabin unit (for example, F10, F30).
  • Maxi - for the block under the hood (for example, SC1, SC5).

Where to buy:

  • Official dealers Škoda (original fuses N 017 750 2).
  • Auto parts stores (eg. Bosch, Hella).
  • Online (Wildberries, AliExpress - but check the denomination!).