Volkswagen Transporter T5 Air Bag Control Module 1C0909605 A

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♻ GENUINE VW TRANSPORTER T5 AIRBAG CONTROL MODULE / SRS ECU 1C0909605A ♻

Genuine used Volkswagen Transporter T5 airbag control module / SRS control unit, fitted as the central electronic controller for the vehicle’s Supplemental Restraint System. This module monitors the airbag system, receives signals from crash sensors and controls deployment of the fitted airbags and seat-belt pretensioners when required.

Part Number: 1C0909605A

VW OE Number: 1C0 909 605 A

Manufacturer Reference: Siemens / SME 5WK43122 on documented applications

Part Type: Airbag Control Module / SRS ECU / Airbag Control Unit

System: Supplemental Restraint System / SRS

Manufacturer: Volkswagen / Siemens

Condition: Genuine used part

Compatibility

Verified Transporter applications for 1C0909605A include:

* Volkswagen Transporter T5 – 2003–2009

* Selected early 2010 T5 applications

* Transporter Panel Van / Furgon

* Transporter Kombi

* Transporter Shuttle

* Caravelle T5

* Multivan T5

* California T5

Specialist T5 parts data lists 1C0909605A across the full 2003–2009 Transporter T5 model range. (VWBreakers)

Airbag ECU repair databases also specifically list the same number for Transporter T5, Caravelle T5, Multivan T5 and California T5. (Airbag24)

Wider VAG Compatibility

OE number 1C0909605A is also documented on selected:

* Volkswagen Golf Mk4

* Volkswagen Bora

* Volkswagen New Beetle

* Volkswagen Polo

* Volkswagen Lupo

* SEAT Leon

* SEAT Toledo

However, the internal coding/index and airbag configuration can differ considerably between vehicles, so the complete module should not be treated as universally interchangeable purely because the base OE number matches. (Autoparts24)

Airbag Configuration / Index Information

This is particularly important on 1C0909605A because VW catalogue data shows several configuration variants under the same base number.

Examples include:

* 1C0909605A 03B – driver airbag

* 1C0909605A 03C – driver + front passenger airbag

* 1C0909605A 03D – driver + front passenger airbag with passenger airbag deactivation option

VW catalogue information specifically states that the control unit should be ordered using the vehicle identification number and matching configuration/index. (LLL Parts)

This means the suffix/index printed on the module label is just as important as the main 1C0909605A number.

Technical Information

The airbag control module is the central controller for the vehicle’s passive safety system.

Its main functions include:

* Monitoring crash sensors

* Evaluating impact signals

* Monitoring airbag electrical circuits

* Controlling airbag deployment

* Controlling seat-belt pretensioners where fitted

* Monitoring passenger airbag configuration

* Recording SRS diagnostic trouble codes

* Communicating with other vehicle control modules

* Illuminating the airbag warning lamp if a fault is detected

The module continuously checks the resistance and continuity of the SRS circuits while the ignition is switched on.

SRS / Airbag System Information

Depending on vehicle specification, the module may work with:

* Driver steering-wheel airbag

* Front passenger airbag

* Side airbags

* Curtain / head airbags

* Seat-belt pretensioners

* Crash sensors

* Passenger airbag deactivation system

* Seat wiring

* Airbag warning lamp

* Vehicle CAN / diagnostic network

The exact airbag equipment fitted to the donor and receiving vehicle must match the module configuration.

Common Symptoms of a Faulty Airbag Module

Replacement or specialist repair may be required if:

* Airbag warning light remains illuminated

* Diagnostic equipment cannot communicate with the module

* Internal control-module fault is stored

* Crash data is stored after an accident

* Airbag circuits report implausible faults

* Module has suffered water damage

* SRS system remains disabled after component replacement

* Communication errors are present

Specialist repair services specifically recognise 1C0909605A as a T5 airbag control module and support diagnosis/repair of these units. (Airbag24)

Important Diagnostic Information

Before replacing the module, also inspect:

* Airbag wiring

* Electrical connectors

* Under-seat wiring

* Seat-belt pretensioners

* Steering-wheel airbag

* Passenger airbag

* Crash sensors

* Battery voltage

* Relevant fuses

* Airbag fault codes

An illuminated airbag warning lamp does not automatically mean the control module itself has failed.

A high-resistance connector, broken wire or faulty airbag/pretensioner can generate similar symptoms.

Crash Data Information

If a vehicle has been involved in an accident, the module may contain stored crash information.

A used replacement module should be checked for:

* Crash data

* Internal fault codes

* Matching airbag configuration

* Compatible index/code

* Correct vehicle coding

Do not assume a used SRS module is ready to install solely because the main OE number matches.

Installation

Airbag-system work involves pyrotechnic safety components and should be carried out by a competent technician.

Typical replacement may involve:

1. Switching off the ignition.

2. Disconnecting the battery correctly.

3. Waiting the manufacturer-specified period before working on the SRS.

4. Accessing the control module.

5. Disconnecting the SRS connectors carefully.

6. Removing the original module.

7. Installing the correctly matched replacement unit.

8. Reconnecting all wiring.

9. Reconnecting the battery.

10. Carrying out a full diagnostic scan.

11. Coding / adapting the module where required.

12. Confirming the airbag warning lamp extinguishes correctly.

Programming / Coding

Coding or adaptation may be required.

A replacement module may need:

* Vehicle-specific coding

* Matching to the fitted airbag configuration

* Clearing of stored fault codes

* Crash-data reset where legally and technically appropriate

* Diagnostic verification

Suitable equipment such as VCDS, ODIS or equivalent professional diagnostics is recommended.

Important Compatibility Note

Before ordering, compare ALL of the following:

* OE number 1C0909605A

* Full label number

* Module index / configuration code

* Siemens/SME reference such as 5WK43122 where present

* Number of airbags fitted

* Passenger airbag specification

* Side / curtain airbag specification

* Passenger-airbag deactivation option

* Electrical connector layout

* Donor and receiving vehicle configuration

* VIN where possible

The base number alone is not enough to guarantee plug-and-play compatibility.

VW catalogue data explicitly shows different SRS configurations under the 1C0909605A base number and instructs that the unit be selected using vehicle identification data. (LLL Parts)

The safest main fitment is:

Volkswagen Transporter / Caravelle / Multivan / California T5 2003–2009, selected early 2010 applications – only where the complete 1C0909605A index and airbag configuration match.

Condition

Genuine used Volkswagen electronic safety module.

As a used electronic component, it may show normal signs of previous installation including:

* Surface marks

* Light scratches

* Dust

* Minor marks around mounting points

* General age-related cosmetic wear

Please inspect all listing photographs carefully and compare the complete label, index number and connectors with your original module before ordering.

Because this is part of the vehicle’s SRS safety system, professional diagnosis and installation are strongly recommended.

An ideal genuine replacement for a faulty, damaged or non-communicating VW Transporter T5 airbag control module / SRS ECU 1C0909605A, provided the full configuration and coding requirements match.