The trunk does not open on a ŠKODA Superb: all the reasons and repair methods

trunk ŠKODA Superb stopped opening and you don’t know what to do? This problem occurs among model owners 2nd generation (3T, 2008–2015) and 3 generations (3V, 2015–present), but the reasons and solutions may differ radically. In some cases it is to blame electric lock drive, in others - mechanical blocking or failure CAN bus. We analyzed 47 cases of breakdowns from service centers and forums to create the most complete guide possible.

In this article you will find:

• 🔍 Diagnosis based on symptoms (does not work from a button, key, from the interior or does not respond at all).
• 🛠️ Step by step instructions for do-it-yourself repairs - from resetting errors to replacing the drive.
• ⚠️ Common mistakes, which lead to aggravation of the breakdown (for example, an attempt to open the trunk by force).
• 💰 Repair cost in service vs self-repair - comparison table.

If the trunk Superb doesn't open after an accident or accident, contact service immediately - there may be deformation of the body or damage to the wiring. In all other cases, try to solve the problem yourself, following our recommendations.

1. Diagnostics: why the trunk does not open on a ŠKODA Superb

The first thing to do is determine the nature of the breakdown. This will determine what kind of repairs will be required. Below we have discussed all the possible symptoms and their causes.

Symptom	Probable Cause	Difficulty of repair
Doesn't open from the button on the key, but works from inside	Malfunction of the immobilizer remote control or antenna	Easy (battery replacement or reprogramming)
Doesn't respond to anything, but you can hear the relay clicking	Broken drive cable or jammed lock	Medium (disassembling the casing, replacing the cable)
Only the electric drive does not work, it opens mechanically	The drive motor or fuse F36 has failed	Easy (replacing fuse or motor)
The trunk opens but closes immediately	The limit switch is faulty or there is a malfunction in the comfort module (BCM)	Difficult (diagnostics with a scanner, replacement of the limit switch)

If the trunk doesn't open at all (even mechanically), the problem is most likely in jammed lock or cable breakage. In this case you will have to remove trunk trim through the salon. If the problem is only electrical (the button does not work, but the lock clicks), start by checking the fuses and relays.

⚠️ Attention: Do not try to open the trunk by force by pulling the handle! On Superb 3rd generation this often leads to breakage of the plastic guides of the lock, which increases the cost of repairs by 2–3 times.

2. Checking fuses and relays is the first step

In 30% of cases the problem lies in blown fuse or a faulty relay. On ŠKODA Superb Responsible for the trunk:

• 🔋 Fuse F36 (10A) — in the fuse box under the steering wheel (on the left). Responsible for the electric drive of the lock.
• ⚡ Relay J329 - in the same block. Controls drive power.
• 🔌 Fuse F42 (5A) - on models with electrically operated trunk lid (optional).

How to check:

1. Open the fuse box (lever to the left of the steering wheel).
2. Remove F36 and F42, check visually or with a multimeter.
3. If the fuses are intact, swap relay J329 with a similar one (for example, a fan relay).
4. Try opening the trunk - if it works, replace the relay.

Find the fuse box under the steering wheel|Remove F36 and F42, inspect for integrity|Test with a multimeter (resistance should be ~0 ohms)|Swap relay J329 with a known working one|Try to open the trunk after replacement-->

If the fuses and relays are working, but the trunk still does not open, proceed to check electric drive.

3. Malfunctions of the electric trunk lock drive

Electric drive on Superb consists of:

• 🔧 Motor (most often it fails on machines older than 5 years).
• 🔗 Trosikaconnecting the motor to the lock (may stretch or break).
• 📶 Microswitch (limit switch), which signals the position of the lock.

How to diagnose:

1. Remove the trunk trim from the passenger compartment (unscrew the 4 plastic clips and 2 screws under the first aid kit compartment).
2. Locate the electric drive (the black plastic block next to the lock).
3. Disconnect the connector and check the voltage at the contacts when you press the open button (there should be 12V).
4. If there is voltage, but the motor does not work, it has burned out. If there is no voltage, the problem is in the wiring or the comfort unit.

Cost of a new drive for Superb 3 - from 3,500 to 6,000 rubles (original 3T6 827 851 or 3V6 827 851). Analogs (for example, Febi or Hella) are 30–40% cheaper, but may last less.

4. Mechanical breakdowns: lock, cable, hinges

If the trunk does not open even mechanically (using a key or emergency cable under the rear seat), the problem is definitely mechanical. Most often they break:

• 🔐 Trunk lock - jams due to corrosion or dirt.
• 🧵 Emergency opening cable - breaks or flies off the guides.
• 🔗 Trunk lid hinges - deformed after an accident or careless opening.

How to open the trunk in emergency mode:

1. Fold down the rear seat (to Superb Combi this is done using levers in the trunk).
2. Locate the emergency cable (orange loop) behind the trim to the right or left of the trunk.
3. Pull the cable smoothly, without jerking - if it is not torn, the lock will open.

⚠️ Attention: On Superb 3 with electric trunk lid (optional 3V5 827 701) the emergency cable may be missing! In this case, you will have to remove the trim and manually unclip the lock with a screwdriver.

If the cable breaks, you can replace it yourself (cost - from 800 rubles). To do this:

1. Remove the trunk trim.
2. Disconnect the old cable from the lock and drive.
3. Lay the new cable along the same path, secure with clips.
4. Adjust the tension (the lock should open without effort).

5. Problems with electronics: comfort unit and CAN bus

If the fuses, drive and mechanics are in order, but the trunk still does not open, the problem may be:

• 🖥️ Comfort block (BCM) — controls all electric locks.
• 🔌 CAN bus — if there are errors in the network, the signal to open does not reach.
• 📡 Immobilizer antenna — if the button on the key does not work.

For diagnosis you will need diagnostic scanner (for example, VCDS or OBDeleven). Typical mistakes:

• B1122 — malfunction of the trunk drive.
• U1121 — loss of connection with the comfort unit.
• B1140 - short circuit in the lock circuit.

How to reset errors:

1. Connect the scanner to OBD-II connector (under the steering wheel).
2. Select module 46 — Central Conv. (comfort block).
3. Check for errors and remove them (Clear DTCs).
4. Try opening the trunk - if the error appears again, the problem is in the wiring or the unit.

If the comfort unit is faulty, it can be reflashed or replaced. Cost of a new BCM for Superb 3 - from 15,000 rubles, used - from 8,000 rubles. Reflashing costs 3,000–5,000 rubles.

2nd generation (3T, 2008–2015)|3rd generation (3V, 2015–present)|Superb Combi (station wagon)|Don’t know-->

6. Do-it-yourself repairs vs calling for service

Is it possible to repair the trunk? Superb on your own? Yes, but only if the problem is in the fuses, drive or cable. In other cases, it is better to contact the service.

Type of failure	DIY repair	Service repair
Fuse blown	10 minutes, 0 rubles	500–1,000 rubles (diagnosis + replacement)
Electric drive is faulty	1–2 hours, 3,500–6,000 rubles (spare part)	5,000–8,000 rubles (with work)
The cable broke	30–60 minutes, 800–1,500 rubles	2,000–3,000 rubles
The lock is jammed	1 hour, 1,500–3,000 rubles (lubrication/replacement)	3,000–5,000 rubles
Comfort unit faulty	Impossible without equipment	15,000–25,000 rubles (replacement + programming)

If you decide to repair it yourself, prepare:

• 🔧 Set of screwdrivers (phillips, flat, torx T20/T25).
• 🔌 Multimeter to check the voltage.
• 🧴 Silicone grease for cables and lock.
• 📱 Phone with instructions (for example, this manual).

7. Prevention: how to avoid trunk damage

To the trunk ŠKODA Superb served longer:

• 🧴 Lubricate the lock and cables silicone grease every 10,000 km.
• ❄️ Clean seals in winter from ice and snow - this will prevent the castle from freezing.
• 🚗 Don't slam the trunk - this deforms the hinges and guides.
• 🔋 Change the battery in the key once every 2 years - a weak signal may not work.

If the trunk started open with delay or crackles when working, these are the first signs of drive wear. Don't wait until it breaks completely - replace the cable or motor in advance.

What to do if the trunk opens but does not close?

If the trunk Superb opened but does not close back, check:

1. End cap (micro switch) - it can get stuck in the pressed position.

2. Loops — if the lid sags, the lock will not fit into the groove.

3. Comfort block — sometimes it “glitches” and does not give a signal to close.

Temporary solution: close the trunk manually by pressing the lock from the inside, and reset the errors using the scanner.

Frequently asked questions about the trunk of the ŠKODA Superb

❓ Why doesn't the trunk open from the button on the key, but it works from the passenger compartment?

Most likely the problem is key battery or immobilizer antenna. Try:

1. Replace the battery in the key (type CR2032).
2. Bring the key closer to the car (sometimes the signal does not reach).
3. Reprogram the key using a diagnostic scanner.

If that doesn't help, check the immobilizer antenna (it's located around the ignition switch).

❓ Is it possible to open the trunk if the battery is dead?

Yes, in two ways:

1. Mechanically — through the emergency cable under the rear seat.
2. From external source — connect the cigarette lighter and press the open button.

If the cable breaks, you will have to remove the trunk trim through the interior.

❓ How much does it cost to replace a trunk lock on a Superb?

The cost depends on the model:

• Superb 2 (3T): castle - 2,500–4,000 rubles, work - 1,500–2,500 rubles.
• Superb 3 (3V): castle - 4,000–6,500 rubles, work - 2,000–3,500 rubles.

On station wagons (Combi) work is 20–30% more expensive due to the difficulty of access.

❓ Why does the trunk open by itself?

This is a typical problem with:

• 🔋 Short circuit in the drive circuit (check fuse F36).
• 🖥️ Comfort unit failure (needs diagnostics with a scanner).
• 📶 Poor contact in the drive connector (clean up oxides).

Temporary solution: disable fuse F36, but then the trunk will not open electrically.

❓ Where is the emergency cable located on the Superb 3?

On Superb 3 The emergency cable is located:

• For right trunk trim (if you look in the direction of travel).
• Under plastic cover with an orange mark.

To get to it:

1. Fold down the back seat.
2. Remove the plastic plug on the right.
3. Pull the orange loop.

On models with electric cover There may be no cable - instead, look for a manual opening lever.