Turn signals in the side mirrors ŠKODA Octavia A5 - This is not only a stylish tuning element, but also an important safety option. It significantly improves the visibility of maneuvers in traffic, especially in bad weather conditions or at night. However, in the basic configurations of this model the function is often missing, and owners are faced with the need for modification.

In this article we will look at all the ways to activate turn signals in mirrors: from selecting suitable parts to software coding via VCDS (VAG-COM). You will find out what configurations Octavia A5 support out-of-the-box functionality on how to modify standard wiring and avoid common installation errors. Particular attention is paid to the nuances for the restyled versions (2009–2013) and the differences between Ambition, Elegance and RS.

Which Octavia A5 trim levels support turn signals in the mirrors?

Function of turn signals in rear view mirrors (SAM - Side Mirror Turn Signals) on ŠKODA Octavia A5 depends on the year of manufacture and level of equipment. The table below shows data for the main configurations:

Equipment Year of issue Turn signals in mirrors Notes
Active 2004–2013 ❌ No Basic version without option
Ambition 2004–2008 ❌ No (optional) Allows installation with modification of wiring
Ambition 2009–2013 (restyle) ✅ Yes (optional) Found in versions with the package Comfort
Elegance 2004–2013 ✅ Yes Standard for most markets
RS 2006–2013 ✅ Yes All versions, including diesel

It is important to consider that even in configurations with factory turn signals in the mirrors (Elegance, RS) function can be disabled by software. This is due to regional settings or previous tampering with the electronics. You can check the availability of the option visually (LEDs under the mirror glass) or through a diagnostic scanner.

For owners Ambition 2004–2008 and Active not only will the mirrors need to be replaced, but also wiring will be required, as well as activation via VCDS. Restyled versions (2009+) are easier to modify thanks to a unified electrical circuit.

📊 What is your Octavia A5 equipment?
  • Active
  • Ambition (until 2008)
  • Ambition (restyle)
  • Elegance
  • RS
  • Other

Which mirrors are suitable for installing turn signals?

To equip Octavia A5 turn signals in the mirrors, you need to select compatible parts. Original spare parts from ŠKODA have articles:

  • 🔹 Left mirror with turn signal: 1Z1 857 507/508 (for versions without heating) or 1Z1 857 507/508 A (heated).
  • 🔹 Right mirror with turn signal: 1Z1 857 509/510 (similar to heating).
  • 🔹 Universal LED kit: 1K0 949 101/102 (fits most models VW Group).

An alternative to the original are mirrors from VW Golf V, Jetta or Passat B6 — they are identical in mounting and connectors. The main condition: the article must end with 507/508/509/510 (for Octavia A5) or 517/518/519/520 (for facelift).

When choosing, consider:

  • 🔋 Presence of heating: if your car is equipped with it, buy mirrors with the suffix A.
  • 🔦 Turn signal type: LED (LED) or lamp. The former are more reliable and brighter, but require a resistor for correct operation.
  • 🎨 Body color: mirrors can be black (Black) or body color (Body Color).
⚠️ Attention: Mirrors from Octavia A7 or Superb II will not fit - they have a different connector and mounting form. Also avoid cheap replicas without certification: they often have incorrect optics, resulting in a glare effect for other drivers.

Step-by-step instructions for installing turn signals in mirrors

The installation process includes three stages: dismantling the old mirrors, laying the wiring and connecting to the control unit. To work you will need:

  • 🔧 Set of screwdrivers (phillips, flat).
  • 🔌 Soldering iron or terminals T-Tap for connecting wires.
  • 📐 Tester or multimeter.
  • 🖥️ Diagnostic cable VCDS (or equivalent).

Step 1: Removing the old mirror

Open the door and remove the plastic trim at the base of the mirror (carefully pry it off with a screwdriver). Unscrew the three mounting bolts (usually a Phillips screwdriver) and disconnect the power connector. If the mirror is heated, remember the location of the wires.

Step 2: Wiring

The new turn signal mirror has an orange wire added (+12V for a turn signal). It must be connected to the corresponding contact in the comfort unit (BCM). Laying route:

  1. From the mirror to the door post (use corrugation for protection).
  2. Through the rubber seal into the interior (next to the main harness).
  3. To the block BCM (located under the steering wheel, behind the instrument panel).

Remove the battery terminal (negative)|Check the integrity of the new mirrors|Prepare tools for soldering|Take photos of the old wiring connectors-->

Step 3: Connect to BCM

In the comfort block (BCM) find a contact T4a/10 (left turn signal) and T4a/11 (right). Connect the orange wire from the mirror to these pins via a diode (for reverse current protection). If using LEDs, add a resistor 150 Ohm to simulate the load.

Step 4: Encoding via VCDS

After mechanical installation, you need to activate the function programmatically:

  1. Connect VCDS to the diagnostic connector.
  2. Select block 09 – Cent. Elect..
  3. Go to Coding → Long Coding Helper.
  4. Find a byte 18 and activate the bit 4 (Mirror Turn Signals Active).
  5. Save settings and reboot BCM.
⚠️ Attention: If, after coding, the turn signals blink in the mirrors, but the standard lamps do not work, check the fuse S16 (10A) in the block under the hood. Also make sure that in the settings BCM mode not activated US-Spec (for the US market), where the turn signals in the mirrors may work differently.
What to do if the turn signals are constantly on?

If the LEDs in the mirrors are lit continuously (not blinking), the problem is a missing resistor or incorrect connection polarity. Check:

1. Connect "+" to pin 10/11 in the BCM, and "-" to ground.

2. The presence of a 150–220 Ohm resistor in the LED circuit.

3. No short circuit in the harness (call with a tester).

Common mistakes and how to avoid them

Even when following the instructions, owners Octavia A5 often encounter problems. Here are the most common:

  • 🚨 The turn signals do not blink, but are constantly on.

    Cause: Missing resistor for LED or incorrect connection to BCM. The solution is to add a resistor 150 Ohm parallel to the LED.

  • 🔌 The standard turn signals do not work after installation.

    Culprit: circuit overload due to additional consumers. Check the fuse S16 and wiring integrity.

  • ⚡ Short circuit when turning on the turn signal.

    Usually caused by damage to the insulation when laying wires. Use corrugation and heat shrink for protection.

  • 🔄 The turn signals in the mirrors operate in reverse phase (the left one blinks when the signal is on the right).

    Check the correct connection to the contacts T4a/10 (left) and T4a/11 (right).

Critical error: if, after encoding via VCDS, other functions (for example, central locking or power windows) stop working, it means that the wrong byte in the BCM was changed. In this case, you need to reset the unit to factory settings and repeat the procedure.

Another common problem is mismatched wire color coding. In European versions Octavia A5 the orange wire is responsible for the turn signals, and in American (US-Spec) - yellow. Always check the specific modification diagram!

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Before soldering the wires, be sure to strip them and treat them with flux - this will prevent oxidation. For reliability, use heat shrink tubing instead of electrical tape.

Alternative activation methods without VCDS

Not all owners have access to a diagnostic scanner VCDS. In this case, you can activate the turn signals in the mirrors using alternative methods:

  • 📱 Mobile OBD2 adapters.

    Applications like Carista or OBDeleven allow you to change settings BCM via smartphone. The function is available in paid versions.

  • 🔧 Manual BCM flashing.

    For experienced users: you can download modified firmware for the comfort unit and upload it via K-Tag or Galletto. Risky method - if there is an error, the unit will fail.

  • 🔌 Using a flashing relay.

    If coding is not possible, connect the turn signals via a separate relay synchronized with the standard lamp. The downside is the additional load on the chain.

For adapters OBDeleven activation instructions:

  1. Connect the adapter to the OBD2 connector.
  2. In the application, select Control Units → Central Electronics (09).
  3. Go to Adaptations → Channel 6.
  4. Set value 1 for parameter Mirror Turn Signals.
  5. Save and reload the block.

Important: not all adapters support deep encoding. Please check compatibility before purchasing Octavia A5 (platform PQ35).

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Activation via mobile adapters is the most inexpensive method, but is only suitable for restyled versions (2009+). On pre-restyle (2004–2008) a full-fledged VCDS is often required.

Comparison of LED and lamp turn signals: what to choose?

When installing turn signals in mirrors Octavia A5 owners are faced with a choice between LED (LED) and traditional lamp modules. Let's compare them based on key parameters:

Criterion LED turn signals Tube turn signals
Brightness ⭐⭐⭐⭐⭐ (up to 3000 mkd) ⭐⭐⭐ (up to 1000 mkd)
Energy consumption 0.5–1 W 5–10 W
Service life 50,000+ hours 1,000–2,000 hours
Cost 1,500–3,000 rubles (set) 500–1 200 ₽
Installation Requires a resistor Direct connection

Benefits LED:

  • 💡 Instant on (no delay like lamps).
  • 🔋 Less load on the generator.
  • 🌧️ Resistant to vibration and moisture.

Disadvantages LED:

  • 🔧 The need to modify the circuit (resistors, diodes).
  • 💰 Higher price.
  • 🚨 Risk of dazzling other drivers if the installation angle is incorrect.

For Octavia A5 optimal choice - LED modules with resistors, as they provide better visibility and reliability. Tube turn signals are only advisable for budget installations or if the unit BCM does not support coding for LEDs.

Legislative nuances: is this allowed in Russia?

The legality of turn signals in mirrors is being regulated GOST R 41.48-2004 (UNECE Regulation No. 48) and Technical Regulations of the Customs Union 018/2011. According to these documents:

  • ✅ It is allowed to use additional lighting devices if they:
    • 🔆 They do not blind other road users.
    • 🟡 They are orange (for turn signals).
    • 📏 Meets standards for brightness and luminous angle.
  • ❌ Prohibited:
    • 🚫 Install light elements that simulate special signals (blue, red).
    • 🚫 Use flashing lights that are not synchronized with the standard turn signals.

In practice, turn signals in mirrors Octavia A5 do not cause complaints from the traffic police if:

  • 🔧 They are set according to GOST (brightness no more than 400 cd, blinking frequency 1–2 Hz).
  • 📄 Included in the map of lighting devices (during technical inspection).
  • 🚗 Not covered with tinting or overlays.

For complete legality it is recommended:

  1. Save documents for spare parts (receipts, certificates).
  2. Have your lights checked at a vehicle inspection station.
  3. When installing LEDs, use certified modules (for example, HELLA or OSRAM).
⚠️ Attention: If the turn signals in the mirrors blink at odds with the standard lamps, this is regarded as a malfunction (clause 3.6 of the List of Traffic Regulations faults). In this case, the inspector has the right to issue a fine under Art. 12.5 Code of Administrative Offenses (500 rubles).

FAQ: Frequently asked questions about turn signals in the mirrors of Octavia A5

Is it possible to install turn signals in the mirrors on the Octavia A5 Active 2006?

Yes, but you will need:

  1. Buy mirrors with turn signals (items 1Z1 857 507/509).
  2. Route the wiring from the mirrors to the block BCM.
  3. Activate the function via VCDS or alternative methods.

B Active There is no factory preparation, so you will have to solder the wires and add resistors for the LED.

Why do the turn signals in the mirrors blink faster than the standard ones after installation?

This is due to:

  • The absence of a resistor in the LED circuit (add 150 Ohm parallel to the LED).
  • Incorrect setting BCM (check the byte 18 in encoding).
  • Overload of the circuit (if additional consumers are connected).

For diagnostics use VCDS in section Measuring Blocks → Group 009 (the blinking frequency is displayed there).

What resistors are needed for LED turn signals?

Resistors required for correct operation:

  • 🔹 150 Ohm / 5 W — for each mirror (connected in parallel with LEDs).
  • 🔹 470 Ohm / 0.5 W — for protection against power surges (optional).

The resistors are mounted inside the door (closer to the connector) and insulated with heat shrink.

Is it possible to connect turn signals to mirrors without coding?

Yes, but with reservations:

  • 🔌 Via a relay: connect the turn signals in parallel with the standard lamps using a relay 12V with normally open contacts.
  • 📱 Via adapter OBDeleven: in some versions you can activate the function without a full VCDS.

Without coding, the turn signals will work, but failures in other systems are possible (for example, turning off the heated mirrors).

Where to buy original mirrors with turn signals for Octavia A5?

Original spare parts can be ordered:

  • 🏬 From official dealers ŠKODA (see articles above).
  • 🌍 On foreign sites: Ebay, Amazon (search by code 1Z1857507).
  • 🛒 In Russian stores: Exist.ru, Autodoc, Emmegi.

Cost of original mirrors: ~5,000–8,000 rubles per pair. Analogs (for example, HEKO) will cost 2–3 times less.