The lighter stopped working in your house. ŠKODA Octavia A7 (2013-2020)? The first thing to check is the safety lock. In 80% of cases, the problem lies in it, especially if other electrical appliances in the car are functioning normally. But where to look for this fuse, what is its denomination and how to replace it correctly so as not to burn the entire chain?

In this article you will find exact layout diagrams lighter for all modifications Octavia A7 (including 2017 facelift), step-by-step instructions for replacing with a photo, and list of common mistakesThe ones that owners allow for during diagnosis. We will also discuss why the fuse can burn out again and what to do about it.

Where is the cigarette lighter fuse: diagram and photo

B ŠKODA Octavia A7 The cigarette lighter fuse is located in fuse box under the wheel (left of the pedals). This is a standard place for most cars. VW GroupBut there are nuances depending on the year of release and configuration.

Specifically for Octavia A7 (2013–2020) The lighter fuse is designated as F37 (or S37 in some versions) and is in main fuse box (Not to be confused with the Relay Block!) Nominal -- 20 Amps (Yellow) Below is the block cover scheme:

Designation Denomination (A) Color Responsible for
F37 (S37) 20 Yellow Lighter, 12V outlet in the central tunnel
F41 15 Blue Lighting of the lighter (if any)
F50 30 Green 12V socket in the trunk (if installed)

⚠️ Attention: On restyled versions Octavia A7 (since 2017) there is sometimes a duplicate fuse F63 (15A) for an additional outlet. If you do not have only a lighter, and the socket in the trunk works - check it. F37.

To get to the fuse box:

  • 🔧 Open the driver's door and sit in the seat.
  • 🔍 On the left panel under the steering wheel, find a plastic cover with the inscription FUSES (or fuse pictogram).
  • 👆 Press the latch at the top of the cover and pull it towards you.
  • 📄 On the back of the lid will be a diagram with designations (look for the lid). F37).
📊 What year is the Octavia A7?
  • 2013–2016
  • 2017–2020 (restyle)
  • I don't know
  • Other

What fuse is needed for the cigarette lighter: rating and analogues

For cigarette lighter in ŠKODA Octavia A7 fuses with a nominal 20 Amps (yellow). This is standard blade fuse type ATO/ATC (size: 19 × 5 × 18.5 mm). It is important to use this denomination - installing a fuse with a lower or higher value can lead to:

  • ⚡ Fires. when using a safety lock with an inflated denomination (for example, 25A or 30A).
  • 🔄 Frequent burnouts undervalued (e.g. 15A).
  • 💥 Chain damage. lighter when using "bugs" (homemade jumpers).

⚠️ Attention: If the fuse burns out again after replacement, this is a signal short circuit in chains. In this case, you need to check the wiring and connectors of the cigarette lighter, and not just put a new fuse.

Where to buy the original safety lock:

  • 🛒 Official dealer ŠKODA - article number N 908 132 03 (A set of 10 fuses of different denominations).
  • 🏬 Auto stores Look for brand safety locks Hella, Bosch or Valeo (nominal 20A).
  • 🌍 Online - on AliExpress or Wildberries (sets of 10-20 pieces for 100-200 rubles).
💡

Before buying, check that the safety lock is marked 20A and the manufacturer's logo. Cheap unnamed fuses often have an understated real resistance and burn out faster.

Step-by-step instructions: how to replace the cigarette lighter fuse

Replacing the fuse with Octavia A7 It takes no more than 5 minutes, but it is important to do everything correctly so as not to damage the block. Follow this instruction:

  1. Turn off the ignition and make sure that all electrical appliances (headlights, radio, air conditioning) are turned off. This will prevent voltage surges when removing the fuse.

  2. Remove the fuse block cover (as described above) and find F37 (20A). For convenience, you can light up a flashlight.

  3. Use plastic tweezers (usually attached to the block cover) or small pliers to carefully pull out the fuse. Don't pull the wires!

  4. Check the fuse for integrity: if the jumper inside is burned out (a break or blackening is visible), it needs to be replaced.

  5. Install a new fuse same denomination (20A) to socket F37. Make sure it fits snugly without any play.

  6. Close the unit cover and check the operation of the cigarette lighter by connecting a known working device (for example, a phone charger).

☑️ What to check before replacing a fuse

Done: 0 / 5

⚠️ Attention: If, after replacement, the fuse immediately blows when the device is connected to the cigarette lighter, the problem is short circuit or malfunction of the connected gadget. Try another device (for example, a car vacuum cleaner instead of a charger). If the fuse is on and with it, you need to diagnose the wiring.

Why the cigarette lighter fuse blows: top 5 reasons

If the fuse F37 burns out regularly, this is not an accident, but a signal of a malfunction. Here are the main reasons:

  1. Short circuit in the circuit. Most often it occurs due to damage to the insulation of the wires under the cigarette lighter or in the fuse box. Symptom: The fuse lights up immediately after replacement.

  2. Malfunction of the cigarette lighter itself. Over time, the contacts oxidize or burn, which leads to increased resistance and overheating. Symptom: The cigarette lighter gets hot even without load.

  3. Connecting powerful devices. The cigarette lighter is designed for maximum 120–150 W (10–12.5A). Connecting compressors, inverters or car refrigerators (especially cheap Chinese ones) often leads to overload.

  4. Poor contact in the connector. If the fuse is not seated tightly or the contacts in the block are oxidized, this can cause sparking and burnout.

  5. Poor quality fuses. Cheap "no-name" fuses often have a low cross-section and burn out at the slightest load.

Critical information: On Octavia A7 with factory audio system Amundsen or Columbus The cigarette lighter and 12V socket are sometimes connected to the same circuit as the USB ports. If the fuse lights up when you connect your phone to USB, the problem may be in the multimedia system and not in the cigarette lighter.

How to check a circuit for a short circuit without a multimeter?

Disconnect both wires from the cigarette lighter (usually the brown “+” and black “–”). If after this the fuse does not light, the problem is in the cigarette lighter. If it lights up, look for a short in the wiring.

What to do if replacing the fuse does not help

If after replacement F37 The cigarette lighter still does not work, check the following:

  • 🔌 The cigarette lighter itself: remove it from the socket (by carefully prying it with a screwdriver) and check for carbon deposits or melted contacts. Replace if necessary (original article number - 5E0 919 201 B).
  • 🔋 Socket voltage: Use a multimeter to check if there is 12V on the cigarette lighter contacts when the ignition is on. If there is no voltage, the problem is in the wiring or fuse box.
  • 🔧 Mass: The grounding point of the cigarette lighter often oxidizes (usually a bolt on the body under the center console). Clean the contact and lubricate LIQUI MOLY Kupfer-Spray.
  • 📶 Control unit: on rare versions Octavia A7 (with option KESSY) The cigarette lighter is controlled via the comfort module. If it fails, flashing may be required.

⚠️ Attention: If you are not confident in your skills in working with automotive wiring, it is better to contact an electrician. Incorrect connection or diagnosis may result in fire in the cabin or failure of the control unit.

For self-diagnosis, you can use the simplest test:

  1. Turn on the ignition.
  2. Connect the multimeter in voltmeter mode to the cigarette lighter contacts (red probe - center, black probe - body).
  3. If the voltage 0V - Check the fuse and wiring.
  4. If there is voltage, but the cigarette lighter does not heat, the problem is in the cigarette lighter itself.

Common mistakes when replacing a fuse on an Octavia A7

Even something as simple as replacing a fuse can be done incorrectly. That's it can't do:

  • 🔥 Install bugs (jumpers made of foil or wire). This may lead to wiring fire, especially if the circuit is closed.
  • 🔄 Use a fuse of a different rating. For example, put 15A instead of 20A or vice versa. This will either not solve the problem or create a new one.
  • 🛠️ Pull the fuse with metal tools. The socket may be damaged or the contacts may short out. Use only plastic tweezers.
  • 🚗 Check the operation of the cigarette lighter with the ignition off. On some versions Octavia A7 The 12V socket only works when the ignition is on.
  • 🔍 Ignore other fuses. If only the cigarette lighter illumination does not work, check F41 (15A).

💡

If after replacing the fuse the cigarette lighter works, but after a while it stops working again, the problem is not in the fuse, but in the circuit. A complete diagnostic is required, including checking the wiring and connectors.

FAQ: Frequently asked questions about the cigarette lighter fuse

Is it possible to drive without a cigarette lighter fuse?

No! This is equivalent to installing a bug. Without a fuse, any short circuit in the cigarette lighter circuit could result in fire or failure of the control unit. If a fuse frequently blows, look for the cause rather than operating the machine without protection.

Which fuse is responsible for the 12V socket in the trunk?

On most Octavia A7 this is F50 (30A, green). But on some versions (for example, with the option Travel Assist) the socket in the trunk can be connected to the same fuse as the cigarette lighter (F37). Check the diagram on the block cover.

Why does the fuse only light up when a specific device is connected?

Most likely, the device (such as a compressor or inverter) is drawing more current than the cigarette lighter circuit can handle. Check the power of the device: if it exceeds 120 W, use the outlet in the trunk (if available) or connect directly to the battery through the terminals.

Is it possible to install a fuse of a higher rating (for example, 25A instead of 20A)?

Absolutely not! The fuse is rated for the maximum current that the wiring can handle. Installing an oversized fuse will result in overheating of wires and risk of fire. If 20A is not enough, look for alternative connection methods (for example, through a relay).

Where can I find a fuse diagram for my version of Octavia A7?

The diagram is printed on the back of the fuse box cover. If it is worn out or missing, download the official owner's manual for your VIN on the website ŠKODA (section "Manuals"). For restyled versions (2017+), the scheme may differ!