Mikrik trunk lock on ŠKODA Octavia Tour - one of those small but extremely unpleasant malfunctions that can ruin your mood at the most inopportune moment. You press the trunk open button, hear a click, but the lid remains in place - or, conversely, the trunk opens spontaneously on the go. In 80% of cases, it is the microswitch (micrik) that is to blame, which signals the electronics about the position of the lock.

In this article we will analyze reasons for mic breakdownwhat's his name diagnose without a scanner, and what to do if it fails. We will look at the models Octavia Tour the second (1Z, 2004–2013) and third (5E, 2013–2020) generations, since their lock design is fundamentally different. You will also find step-by-step instructions with photos, prices for original and analog spare parts, and tips on how to avoid repeated breakdowns.

What is a trunk lock mic and how does it work?

Mikrik (microswitch) is a small electromechanical sensor that records the position of the trunk lock. When you close the lid, the lock tongue presses the microphone button, sending a signal to comfort block (BCM) or central locking. If the microphone is faulty, the electronics “do not understand” whether the trunk is closed or not, which leads to:

  • 🔴 Spontaneous opening of the trunk while driving (usually on bumps or during heavy braking).
  • 🔴 Opening lock from the button on the key or the interior lever.
  • 🔴 Error on the dashboard (for example, “Trunk is open” when the lid is closed).
  • 🔴 Trunk light stays on constantly in the salon.

On Octavia Tour 1Z (2004–2013) The mic is usually built into the lock itself and is sold as a single unit. On Octavia Tour 5E (2013–2020) it is often carried out separately and attached to the body next to the lock. This simplifies replacement, but complicates diagnostics - you have to check both the wiring and connectors.

Interesting fact: on restyled versions Octavia A5 (FL, 2009–2013) The microphone sometimes “glitches” due to oxidation of the contacts in the connector, and not because of the part itself. Therefore, before replacing it is always worth clean contacts and check the voltage.

Signs of a malfunctioning microphone: how to recognize the problem

Symptoms of a microphone failure are often confused with a malfunction lock drive or comfort block. To avoid wasting money on unnecessary spare parts, pay attention to the following “signals”:

Symptom Probable Cause What to do
The trunk does not open with the button, but it opens with the key The microphone is faulty or the wire from it to the BCM is broken Ring the circuit, check the voltage at the microphone connector
The trunk opens spontaneously on bumps The microphone “sticks” or the contacts are oxidized Clean contacts, replace microphone
The open trunk icon is lit on the dashboard even though it is closed Mikrik does not fix the closed position Check the position of the lock tongue relative to the microphone
When you press the button you hear a click, but the trunk does not open The lock drive works, but the microphone blocks the signal Replace the mic or the entire lock (to 1Z)

If the trunk does not open either with the button or with the key, the problem is most likely in lock drive or fuse (F35 at 10A for Octavia 1Z, F42 at 15A for Octavia 5E). But if the lid opens with a key, but not with a button, it is the microphone or its circuit that is to blame.

⚠️ Attention: On Octavia Tour 5E with the system Keyless a faulty microphone can lead to low battery per night. The fact is that the comfort unit constantly “interrogates” the sensor, trying to determine its condition.

Diagnostics of the trunk lock microphone: step-by-step instructions

Before replacing the microphone, be sure to make sure that it is the problem. For this you will need multimeter (or at least a control lamp) and a screwdriver. Verification algorithm:

  1. Remove the trunk trim from the side of the castle. On Octavia 1Z it is attached to 4 plastic clips, on Octavia 5E - on 2 clips and 1 screw under the plug.
  2. Find the mikrik:
    • On 1Z - it is built into the lock, there is a connector with 2-3 wires to it.
    • On 5E — a separate sensor on the body, next to the lock.
  3. Check voltage:
    • Turn on the ignition.
    • One probe of the multimeter is for ground, the second is for the contact of the microphone (usually red or yellow wire).
    • When the trunk is closed there should be 12V, when open - 0V (or vice versa, depends on the model).
  • Ring the chain from the microphone to the comfort unit (the location of the BCM is indicated in the manual).

    • If there is no voltage or it does not change when opening/closing, the microphone is faulty. If there is voltage, but the trunk does not open, the problem is comfort block or wiring.

    Disconnected the battery (negative terminal)

    I photographed the location of the connectors.

    Checked the voltage on the mic

    Cleaned contacts from oxidation

    Prepared a new mic (or lock assembly)

    -->

    On Octavia Tour 1Z The mic often “dies” along with the lock - in this case it is easier to replace the entire assembly. On 5E The sensor is usually separate, but be careful: when dismantling it is easy to break the plastic fastening tab.

    Replacing the microphone on a ŠKODA Octavia Tour: photo instructions

    The replacement process depends on the generation of the car. Below are step-by-step instructions for Octavia 1Z (2004–2013) and Octavia 5E (2013–2020).

    Octavia Tour 1Z (2004–2013)

    On the first generation, the microphone is built into the lock, so you have to change the entire assembly. Procedure:

    1. Open the trunk with the key (if it does not open, remove the trim and disconnect the drive manually).
    2. Disconnect the lock connector (it is located behind the casing, next to the lid hinges).
    3. Unscrew the 3 bolts securing the lock (two on top, one on bottom). Bolts under Torx T25.
    4. Remove the lock and install a new one. Original article: 1Z5 827 401/402 (for left/right lock).
    5. Connect the connector and check the work.

    The cost of the original lock is from 3,500 to 5,000 rubles. Analogs (for example, Febi or TRW) will cost 2,000–2,800 rubles.

    Octavia Tour 5E (2013–2020)

    On the third generation, the microphone is separate, which simplifies replacement:

    1. Remove the trunk trim (snap off the clips and unscrew the screw under the plug).
    2. Find the mikrik — it is attached to the body with one screw (Torx T20).
    3. Disconnect the connector and unscrew the sensor.
    4. Install a new microphone. Original article: 5E0 827 501 (or 5E0 827 502 for facelift).
    5. Connect the connector and check the button operation.

    Price of the original microphone - 1,200–1,800 rubles. Analogues (Hella, Valeo) are worth 600–1,000 rubles.

    What should I do if, after replacing the microphone, the trunk still does not open?

    If the problem remains after replacing, check:

    1. **Wiring integrity** from the mic to the comfort unit (the wires in the corrugation near the trunk hinge often fray).

    2. **Configuring the comfort block** - sometimes after replacing the sensor, the lock needs to be “learned” (on some versions Octavia 5E this is done through VCDS or ODIS).

    3. **Service of the lock drive** - if it is burned out, the trunk will not open even with a new microphone.

    Repair cost: original vs analogues

    The price of spare parts and labor to replace the microphone varies depending on the generation Octavia Tour and region. Below are the current prices for 2026:

    Detail Original (item) Price, rub. Analogue (brand) Price, rub.
    Trunk lock assembly (1Z) 1Z5 827 401 3 500–5 000 Febi (22310) 2 000–2 800
    Mikrik separate (5E) 5E0 827 501 1 200–1 800 Hella (6EL 008 642-001) 600–1 000
    Lock drive (actuator) 1Z5 827 405 (1Z) / 5E0 827 505 (5E) 2 500–4 000 TRW (JGM100) 1 500–2 500
    Replacement work — 800–1 500 — 500–1,200 (unofficial service)

    Important: On Octavia Tour 5E with the system Keyless after replacing the microphone, adaptation may be required via a diagnostic scanner (for example, VCDS). Without this, the keyless trunk opening function will not work.

    If you decide to install an analogue, pay attention to the brands:

    • 🔧 Febi — good price/quality ratio, suitable for 1Z.
    • 🔧 Hella or Valeo - the optimal choice for 5E.
    • ⚠️ Avoid cheap Chinese analogues (for example, NoName for 300–500 rubles) - they often fail after 2–3 months.

    Original (ŠKODA/VW)

    Febi or TRW

    Hella/Valeo

    Other analogues

    I don't know what to choose-->

    Typical mistakes when replacing microphones and how to avoid them

    Even experienced car owners sometimes make mistakes that lead to repeated breakdowns or new problems. Here are the most common:

    ⚠️ Attention: On Octavia Tour 5E When installing a new microphone, do not reverse the polarity of the connector! Red wire - this is usually a “plus”, and black or brown - “mass”. If you connect it the other way around, the sensor will burn out immediately after voltage is applied.
    • 🔧 Uncleaned contacts — before installing a new microphone, be sure to clean the contacts in the connector and on the wires. Oxidation or dirt will result in a poor signal.
    • 🔧 Screws are over-tightened - on 5E The microphone is attached to the body with a plastic tongue. If you overtighten the screw, it will crack.
    • 🔧 Ignoring adaptation - on cars with Keyless after replacing the microphone, “training” is required through diagnostics. Without this, the system will not recognize the new sensor.
    • 🔧 Wiring damage — when removing the trunk trim, it is easy to touch the wires going to the microphone. Check their integrity after dismantling.

    If after replacement the trunk opens, but the “open” light is on on the panel, most likely the problem is comfort block. In this case, only diagnostics or error reset via VCDS.

    💡

    Before replacing the microphone, take a photo of the location of the connectors and wires. This will help avoid confusion when reassembling, especially if you are working with Octavia Tour for the first time.

    Prevention: how to extend the life of the trunk lock mic

    Mikrik is a mechanical part, and its wear is inevitable. However, you can slow down the process and avoid premature failure:

    • 🔧 Lubricate the trunk latch regularly silicone grease (for example, Liqui Moly Silicon-Fett). This will reduce the load on the microphone when closing.
    • 🔧 Don't slam the trunk — abrupt closing over time deforms the lock tongue, which leads to incorrect operation of the microphone.
    • 🔧 Check the wiring fastening - on Octavia 1Z The wires from the microphone often fray in the corrugation near the trunk hinge.
    • 🔧 Avoid high pressure washing in the lock area - water enters the mic connector and causes corrosion.

    If you frequently transport heavy loads, install gas struts on the trunk. They will reduce the load on the lock and microphone when opening/closing.

    On Octavia Tour 5E with the system Keyless Once a year, check the condition of the microphone contacts. Oxidation can lead not only to sensor malfunction, but also to low battery due to constant “poll” of the comfort block.

    💡

    If the trunk begins to open spontaneously, do not delay diagnostics! This is not only inconvenient, but also dangerous - at speed, the cover can damage the glass or body.

    Frequently asked questions about the trunk lock microphone for the ŠKODA Octavia Tour

    Is it possible to repair the microphone or just replace it?

    Theoretically, the microphone can be disassembled and the contacts cleaned, but in practice this is a temporary solution. The contacts inside the sensor wear out over time, and even after cleaning it will not work for long. We recommend replacement, especially since the new mic is inexpensive (from 600 rubles for analogues).

    What tool is needed to replace the microphone?

    For Octavia 1Z:

    • Screwdriver Torx T25.
    • Flathead screwdriver for removing trim.

    For Octavia 5E:

    • Screwdriver Torx T20.
    • Plastic puller for trim clips.
    • Multimeter for checking voltage.

    Why does the trunk open after replacing the microphone, but the light on the panel is on?

    This means that the comfort block (BCM) does not recognize the signal from the new sensor. Reasons:

    • Incorrect polarity when connecting the connector.
    • Adaptation via diagnostic scanner is required (relevant for Octavia 5E with Keyless).
    • The problem is in the comfort unit itself (diagnostics required).

    Try clearing errors using VCDS or disconnect the battery for 10 minutes.

    Is it possible to drive with a faulty microphone?

    Technically yes, but it's not safe:

    • The trunk may open while driving (especially on bumps).
    • On Octavia 5E with Keyless this will drain the battery.
    • In the rain, water will enter the trunk through a loosely closed lid.

    If it is not possible to immediately replace the microphone, disconnect its connector and use only the key to open it.

    Where to buy a microphone for Octavia Tour: original or analogue?

    It is better to buy original spare parts from official dealers ŠKODA or in trusted online stores (for example, Exist.ru, Autodoc). Analogues (Febi, Hella) can be found at:

    Before purchasing, please check the article number VIN-your car code.