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Volkswagen Multivan T5 2012 Diesel Ignition barrel lock 6R0905851B

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#14


Genuine used Volkswagen Multivan T5 / T5.1 Ignition Barrel Lock Housing / Steering Column Lock, removed from a 2012 diesel vehicle.


Part Number: 6R0905851B

VW OE Number: 6R0 905 851 B

Part Type: Ignition Lock Housing / Steering Column Lock

Position: Steering Column

Application: Volkswagen Multivan / Transporter T5 T5.1

Donor Vehicle: Volkswagen Multivan T5, 2012 Diesel


Compatibility


Commonly associated with:


* Volkswagen Multivan T5 / T5.1

* Volkswagen Transporter T5 / T5.1

* Approx. 2010–2015

* Conventional key-operated ignition systems

* Various diesel and petrol engine versions


A 2012 VW Multivan / Transporter application with 6R0 905 851 B is specifically documented, and the part is also cross-referenced to T5 chassis variants including 7HA, 7HH, 7EA and 7EH. (Sbazar)


This unit is intended for vehicles using a traditional ignition key system rather than KESSY / keyless-start configurations. (Autoparts24)


Technical Information


This component forms part of the ignition and steering-column security system.


Its main functions include:


* Providing the mounting housing for the ignition lock cylinder

* Mechanically locking the steering column when the key is removed

* Allowing the steering lock to release when the correct key is inserted and turned

* Supporting the ignition switch mechanism

* Providing the mechanical interface between the ignition key barrel and electrical ignition switch


The housing itself should not be confused with the complete coded ignition key system. Depending on how the used part is supplied, the lock cylinder, electrical ignition switch, reader coil or key may be separate components.


Ignition / Immobiliser System


On T5/T5.1 models, vehicle starting involves several related components, including:


* Mechanical ignition barrel

* Steering column lock housing

* Electrical ignition switch

* Immobiliser transponder inside the key

* Immobiliser reader coil around the ignition barrel

* Instrument cluster / immobiliser electronics

* Engine ECU


The mechanical lock housing does not itself determine whether the engine is authorised to start. Immobiliser authorisation is handled electronically through the coded key and vehicle immobiliser system.


Common Symptoms of a Faulty Ignition Lock Housing


* Ignition key difficult to turn

* Steering lock does not release correctly

* Steering remains locked after inserting the key

* Key sticks inside the ignition

* Excessive movement in the ignition barrel

* Ignition switch does not consistently reach the start position

* Intermittent electrical ignition contact

* Steering lock mechanism becomes stiff or jammed

* Internal mechanical wear or damage


Important Diagnostic Information


Before replacing the ignition lock housing, it is worth checking:


* Ignition key condition

* Lock cylinder / barrel

* Electrical ignition switch

* Immobiliser reader coil

* Steering column lock mechanism

* Battery voltage

* Key transponder / immobiliser fault codes

* Steering column wiring and connectors


If the key turns normally but the engine does not crank or start, the fault may instead be related to the electrical ignition switch, starter circuit or immobiliser system.


Installation / Coding Information


The steering lock housing is normally mechanically secured to the steering column and may use security / shear bolts designed to prevent easy removal.


If only the mechanical housing is being replaced and the original lock barrel, key and immobiliser components are retained, immobiliser coding may not necessarily be required.


However:


* A replacement lock barrel may require matching to the vehicle key

* A different transponder key will require immobiliser programming

* Immobiliser-related parts should be diagnosed and coded with suitable equipment where necessary


Care should also be taken when working around the steering column because of the nearby driver airbag and steering-column electronics.


Important Compatibility Note


Please compare:


* 6R0905851B complete part number

* Conventional key ignition rather than KESSY

* Steering column design

* Lock barrel mounting

* Electrical ignition switch arrangement

* Connector layout

* Vehicle PR codes

* VIN / VW EPC information


with your original unit before purchasing.


The same base part family appears across several Volkswagen Group vehicles, so matching the exact OE number and vehicle specification is recommended rather than purchasing by appearance alone. (Autoparts24)


Condition: Genuine used Volkswagen part. May have normal cosmetic marks and signs of previous use. Please check photos carefully for the exact supplied components, mounting points and lock condition.


Ideal replacement for a worn, jammed or damaged Volkswagen Transporter / Multivan T5.1 ignition lock housing or steering-column lock.

Brand: Volkswagen

Manufacturer Part Number: 6R0905851B

MPN: 6R0905851B


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