If you are the owner ŠKODA Octavia TUR (especially models A5 (1Z3), A7 (5E) or restyled versions FL) and are faced with problems in the operation of electrical equipment - the headlights do not light up, the power windows do not work, or the central locking system fails - the culprit is often comfort block (aka Comfort Control Unit, CCU or Central comfort control unit). This module is responsible for controlling most of the car's "conveniences", and its malfunction can paralyze everyday operation.

The main difficulty for owners is the comfort block in the Octavia TUR is hidden in a non-obvious way, and its location depends on the generation and configuration. Unlike fuses, which are usually located under the hood or in the passenger compartment, the CCU can be installed in one of three places: behind the glove compartment, under the dashboard, or even in the trunk. In this article we will look at exact coordinates of the comfort block for all versions of Octavia TUR, we will show you how to get to it without dismantling half of the interior, and give advice on diagnosing typical faults.

What is a comfort unit in the ŠKODA Octavia TUR and what is it responsible for?

Comfort block (CCU) is an electronic module that controls the vehicle's "secondary" systems not directly related to the engine or safety. B Octavia TUR (especially in versions with CAN bus) it functions as a “think tank” for:

  • 🔑 Central locking (including remote control)
  • 🚗 Window lifters (all four doors)
  • 💡 Interior lighting and instrument lighting
  • 🔋 Electric mirrors and seats (if provided)
  • 🚨 Alarm and immobilizer (interacts with ECU)
  • 🔄 Door locks when driving

Difference Octavia TUR from standard versions is that in “charging” modifications the comfort unit often has additional relays to control systems associated with gas equipment (LPG). This complicates its design and increases the risk of breakdowns due to overloads.

If the CCU fails, symptoms can range from spontaneous opening of doors until the electronics completely fail. For example, a typical problem for Octavia A5 TUR — “glitches” of power windows in cold weather, which are often associated with oxidation of contacts in the comfort unit.

📊 What version of ŠKODA Octavia TUR do you have?
  • A5 (1Z3, 2004–2013)
  • A7 (5E, 2013–2020)
  • Facelift (FL, 2017–2020)
  • Another version

Where is the comfort block located in the Octavia TUR: depending on generation

Comfort block location in ŠKODA Octavia TUR depends on the year of manufacture and modification. Below we have provided the exact coordinates for each generation, as well as the nuances of access.

Generation Octavia TUR Years of manufacture Comfort block location Difficulty of access (1–5)
A5 (1Z3) (pre-facelift) 2004–2009 Under the dashboard, to the left of the steering column (behind the plastic trim) 3
A5 (1Z3) (restyle) 2009–2013 Behind the glove compartment, on the heater mounting bracket 4
A7 (5E) (pre-facelift) 2013–2017 In the trunk, under the shelf on the right (passenger side) 2
A7 (5E) FL (restyle) 2017–2020 Under the center console, next to the climate control unit 5

It is important to consider that in Octavia TUR with right-hand drive (eg for UK or Japanese markets) the comfort block can be mirrored. Also in cars with all-wheel drive 4x4 or DSG sometimes there is a duplicate module under the hood - it is confused with the main CCU.

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If your Octavia TUR is equipped with KESSY (keyless entry), the comfort unit can be combined with an immobilizer module. In this case, its location moves closer to the steering column.

Step-by-step instructions: how to get to the comfort block in the Octavia A5 TUR

Let's consider the most difficult case - Octavia A5 TUR (restyle, 2009–2013), where the comfort unit is hidden behind the glove compartment. You will need:

  • ⚒️ Flat hole cloth or plastic pick
  • 🔧 10 mm socket wrench (for glove compartment mounting)
  • 📷 Flashlight (required!)
  • 🧲 Magnet on telescopic handle (for convenience)

Sequence of actions:

  1. Open the glove compartment and remove all contents.
  2. Click on fasteners on the sides glove compartment (they are hidden behind rubber seals) and pull it towards you.
  3. Unscrew the two bolts securing the glove compartment to the dashboard (with a 10 mm socket wrench).
  4. Gently disconnect backlight connector glove compartment (it can be glued to the plastic).
  5. Behind the glove compartment you will see black plastic box with the inscription 1Z3 937 049 (or similar) - this is the comfort block.

☑️ Preparing to dismantle the comfort unit

Done: 0 / 4

⚠️ Attention: B Octavia TUR with HBO next to the comfort unit often passes gas pipeline. Do not touch it with metal tools or cause sparks!

Location of the comfort unit in the Octavia A7 TUR: features of the luggage compartment

B Octavia A7 TUR (2013–2020) the manufacturer moved the comfort unit to the trunk, which simplified access, but created new problems. The main one is moisture ingress through the trunk seals, which leads to corrosion of the contacts.

To find CCU in A7 TUR:

  1. Open the trunk and remove right sidebar (it is attached to 4 plastic clips).
  2. Under the shelf you will see black box with connectors (usually marked 5E0 937 087).
  3. To dismantle, press the latch on the connector and carefully pull the unit towards you.

In restyled versions (A7 FL) the comfort block can be hidden deeper - under spare wheel. In this case you will have to:

  • Remove the trunk floor cover.
  • Unscrew the spare tire mount (17 mm wrench).
  • Raise the floor and find the CCU next to ABS control unit.
What to do if the comfort unit is flooded with water?

If traces of corrosion or moisture are visible on the CCU, it must be dried with a hairdryer (temperature no higher than 60°C) and the contacts must be treated with spray Kontakt 60. In 80% of cases this restores functionality. If the unit does not respond, it will require flashing or replacement.

How to determine that the comfort unit is faulty: symptoms and diagnosis

Before you climb into the cabin or trunk, make sure that the problem is really in the comfort unit. Typical signs of its malfunction in Octavia TUR:

  • 🚪 Doors open/close spontaneously while driving.
  • 🔄 Window lifters operate jerkily or only in one direction.
  • 💡 The interior lighting blinks or does not respond to door openings.
  • 🔑 The central locking operates with a delay (more than 2 seconds).
  • 🚨 There is an error on the dashboard ESP or ABS (in rare cases the CCU conflicts with these systems).

For diagnostics you can use:

  1. Scanner ELM327 (for example, VCDS or OBDeleven) - check for errors at the address 46 (Central Comfort).
  2. Multimeter - measure the voltage at the CCU connectors (should be 12.6–14.4 V).
  3. Visual inspection - look for melted contacts or traces of oxidation.

⚠️ Attention: If you see an error when scanning 01314 — Engine Control Module, this may indicate a CCU conflict with ECU due to incompatible firmware. In this case, a flashing is required both blocks!

Frequent breakdowns of the comfort unit in Octavia TUR and repair methods

Owners ŠKODA Octavia TUR The most common CCU problems encountered are:

Breakdown Reason Repair method Cost (RUB)
Power windows don't work Oxidation of relay contacts J317 Cleaning contacts, replacing relays 500–1 500
The central locking works randomly Short circuit in the circuit T16 Replacing the fuse S30, checking wiring 300–2 000
Dimensions or license plate lights do not light up Transistor failure V49 Resoldering an element or replacing a block 3 000–8 000
The comfort unit does not respond to commands Firmware failure or burnt-out stabilizer 7805 Flashing or replacing the board 5 000–12 000

B Octavia TUR with HBO, the additional load on the CCU is control gas injectors and valve. If the comfort unit “glitches” after installing gas equipment, check:

  • 🔌 Quality masses on the body (often oxidizes under the HBO mount).
  • 🔄 Availability decoupling diodes in the CCU power supply circuit.
  • 📶 Unit firmware compatibility with HBO ECU (for example, Stag-400 or Lovato).
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In 60% of cases, “breakdowns” of the comfort unit in the Octavia TUR are not associated with the CCU itself, but with oxidation of contacts in the connectors or blown fuses. Always start your diagnosis by checking these elements!

Replacing the comfort unit in Octavia TUR: nuances and coding

If the comfort unit is faulty and cannot be repaired, it will have to be replaced. B Octavia TUR There are several critical points:

  1. VIN compatibility: New CCU must be identical by catalog number (for example, 1Z3 937 049 B for A5 TUR). Even minor differences in the index (for example, the letter A instead of B) may result in inoperability.
  2. Encoding: After replacement, the unit requires adaptation via a diagnostic scanner (for example, VCDS). Without this, the power windows and central locking will not work.
  3. Immobilizer: In cars with KESSY or immo 4th generation Replacing the CCU may prevent the engine from starting. You will need to “bind” the new block to the keys.

The cost of a new comfort block for Octavia TUR:

  • A5 (1Z3): 8,000–15,000 rub. (original), 3,000–6,000 rub. (analog).
  • A7 (5E): 12,000–20,000 rub. (original), 5,000–10,000 rub. (used).

⚠️ Attention: When purchasing a used comfort unit, make sure that it has not been “sunk” or damaged by corrosion. Check it for functionality before installation - connect to the battery and test the relay.

FAQ: Frequently asked questions about the comfort unit in the ŠKODA Octavia TUR

Is it possible to repair the comfort unit yourself?

Yes, if the problem is oxidized contacts, blown fuses or relay. To do this, just disassemble the unit, clean the board with alcohol and replace damaged elements. However, if faulty microcontroller or firmware, you will need a specialist with a soldering station and a programmer.

Why do the power windows not work after replacing the comfort unit?

This is due to the lack encodings. The new CCU needs to be "trained" via a diagnostic scanner (e.g. VCDS), indicating the vehicle configuration (number of doors, type of central locking, etc.). Without this, the unit will not control the actuators.

Where can I find the connection diagram for the comfort unit for the Octavia A5 TUR?

The official diagram can be downloaded from the program ElsaWin (for ŠKODA dealers) or find on forums, for example, Octavia-Club. For A5 TUR diagrams with designation are relevant 1Z3-937-049 (for facelift) or 1Z3-937-049-A (pre-facelift).

Can the comfort unit affect engine performance?

In the standard configuration - no. However, in Octavia TUR with LPG CCU sometimes interacts with Engine ECU through CAN bus. If the comfort unit freezes, it can block signals from the sensors, which will lead to transition to emergency mode or even stopping the engine.

How to reset comfort block errors without a scanner?

A temporary reset can be performed removing the battery terminal for 10–15 minutes. However, this will not remove errors from the unit's memory, but will only reboot the system. For a full reset you need a scanner or adapter ELM327 with the program Carista.