VW TRANSPORTER V T5 Flatbed Front Left Door Lock 25AG 3B2837015AG 2.50

#85

Genuine used Volkswagen Transporter T5 front left N/S passenger-side electric door lock / latch mechanism, part number 3B2837015AG, suitable for selected UK right-hand-drive vehicles with remote central locking.

This factory door-lock mechanism is installed inside the front passenger door and combines the mechanical door latch with the electrical central-locking actuator and associated position-switch functions.

Part Number: 3B2837015AG

VW OE Number: 3B2 837 015 AG

Later / Replacement OE Number: 3B2837015AM

Part Type: Front Door Lock / Latch / Central Locking Actuator

Position: Front Left

UK Vehicle Side: N/S – Passenger Side

Vehicle Configuration: Right-Hand Drive (RHD)

Locking System: Remote Central Locking – selected applications

Operating Type: Electric / Mechanical

Connector: Commonly 8-pin configuration – compare original

Engine Application: Suitable for matching 2.5 TDI vehicles; lock fitment is not engine-specific

Manufacturer: Volkswagen / VAG

Condition: Genuine used part

Reference: 25AG

Compatibility

Suitable for selected:

* Volkswagen Transporter T5

* Volkswagen Caravelle T5

* Volkswagen Multivan T5

* Volkswagen California T5

* Transporter Panel Van

* Kombi

* Shuttle / Minibus

* Camper conversions

* Platform / chassis variants where the matching front-door configuration is fitted

Applicable to selected engines including:

* 1.9 TDI

* 2.5 TDI

* Selected petrol applications

For your application, this unit is suitable for selected Transporter T5 2.5 TDI vehicles provided the original door-lock number and electrical specification match.

Important UK Side Information

For a UK right-hand-drive Transporter T5:

3B2837015AG = FRONT LEFT / N/S / PASSENGER SIDE

It should not be advertised as the front-right driver’s-side lock on a UK vehicle.

The corresponding right/front driver’s-side lock uses a different OE number family.

This distinction is particularly important because online listings sometimes confuse left/right positioning between RHD and LHD vehicles.

OE Number / Supersession Information

Original reference:

3B2837015AG

Later replacement/reference:

3B2837015AM

Both numbers are associated with the front-left RHD remote-central-locking application.

For a used replacement, matching the exact number on the original lock remains the safest method.

Technical Information

The front door lock performs both mechanical and electrical functions.

Mechanically, the latch engages with the striker mounted on the vehicle body and securely holds the door closed.

Electrically, the integrated actuator operates as part of the vehicle’s central-locking system.

Depending on vehicle specification, the lock assembly can provide information relating to:

* Door locked/unlocked state

* Door open/closed state

* Central locking operation

* Remote locking

* Interior locking operation

* Vehicle convenience functions

Internal microswitches and electrical contacts are common sources of age-related problems in this type of lock mechanism.

Central Locking System Information

When the vehicle is locked or unlocked using the remote or central-locking controls, an electrical signal operates the actuator incorporated into the lock mechanism.

The actuator moves the internal locking mechanism between its locked and unlocked positions.

The assembly therefore combines:

* Mechanical latch

* Electric actuator

* Internal locking mechanism

* Position sensing/microswitch functions

* Electrical connector

A fault inside the assembly can therefore cause electrical symptoms even when the door still physically opens and closes.

Common Symptoms of a Faulty Door Lock

Typical symptoms include:

* Passenger door not locking

* Passenger door not unlocking

* Central locking working intermittently

* Door remaining locked

* Door refusing to latch

* Remote locking not operating the passenger door

* Door locks and immediately unlocks

* Interior handle not operating correctly

* Exterior handle not releasing the latch

* Door-open status incorrectly detected

* Interior light behaving incorrectly

* Alarm/convenience system incorrectly detecting the door

* Clicking from the lock actuator without successful operation

Intermittent operation is common when the internal actuator, microswitches or electrical contacts begin to wear.

Door-Open Microswitch Information

The lock mechanism contains switching functions used by the vehicle to determine the state of the door.

A failing internal switch can cause symptoms such as:

* Interior light not illuminating when the door opens

* Vehicle incorrectly showing the door as closed

* Central locking behaving unexpectedly

* Alarm/convenience functions operating incorrectly

Therefore, a door can still mechanically latch while the electrical portion of the lock is faulty.

Important Diagnostic Information

Before replacing the lock, check:

* Door wiring loom

* Door-to-body wiring section

* Electrical connector

* Connector pins

* Central-locking power supply

* Interior door handle cable

* Exterior handle mechanism

* Door striker

* Door alignment

* Relevant fuses

* Stored convenience/central-locking fault codes

Broken wiring in the flexible door-to-body section can produce symptoms very similar to a failed lock actuator.

Electrical Connector Inspection

Inspect the connector carefully for:

* Corroded terminals

* Bent pins

* Loose terminals

* Moisture

* Damaged wiring

* Broken locking tabs

* Previous repair damage

The 3B2837015AG application is commonly associated with an 8-pin electrical configuration, but the actual connector on the vehicle should always be compared before purchase.

Mechanical Latch Inspection

If the door is difficult to close, inspect the mechanical components before assuming the electrical actuator has failed.

Check:

* Door striker

* Latch mechanism

* Door hinges

* Handle cables

* Exterior handle

* Door alignment

A badly adjusted door or striker can place excessive load on the latch and make the central-locking actuator appear weak.

Installation

Installation requires removal of the front-door interior trim and access to the internal door-lock mechanism.

Before installation:

* Disconnect electrical power as appropriate

* Compare the replacement lock with the original

* Compare OE numbers

* Compare connector/pin arrangement

* Inspect handle cables

* Inspect wiring

* Check the door striker and alignment

During installation:

* Connect the electrical plug securely

* Attach handle cables correctly

* Secure the lock mechanism

* Route cables and wiring in their original positions

* Confirm that nothing interferes with the window mechanism

Before fully refitting the door trim, test:

* Exterior handle

* Interior handle

* Central locking

* Remote locking

* Locking/unlocking

* Door-open detection

* Mechanical latch operation

Programming / Coding

No immobiliser programming is normally required when replacing the door-lock mechanism itself.

The lock is an actuator/switch assembly rather than an immobiliser ECU.

After installation, normal operation should return provided the correct lock version is fitted and there are no wiring or control-module faults.

A diagnostic scan may be useful if central-locking faults remain after replacement.

Important PR-Code Information

Volkswagen fitted different front-door lock mechanisms depending on the vehicle’s original locking specification.

3B2837015AG is associated with selected RHD vehicles equipped with remote-controlled central locking.

Therefore, not every Transporter T5 front-left lock is interchangeable.

Two vehicles of the same year and engine size can potentially have different lock mechanisms depending on their factory equipment.

Important Compatibility Note

Please compare before ordering:

* OE number – 3B2837015AG

* Later reference 3B2837015AM

* Front LEFT position

* UK N/S passenger side

* RHD configuration

* Remote central-locking specification

* Electrical connector

* Pin configuration

* Lock body design

* Handle/cable connections

* Vehicle PR codes

* Vehicle production date

Engine size alone does not determine compatibility.

Although this lock is used on selected 2.5 TDI Transporter T5 vehicles, matching 3B2837015AG / 3B2837015AM and the original locking-system configuration is strongly recommended.

Condition

Genuine Volkswagen used front-door lock / central-locking actuator.

As a used mechanical/electrical component, normal signs of previous use may include:

* Surface marks

* Dirt

* Dust

* Light oxidation

* Grease residue

* General installation/removal marks

Please inspect all listing photographs carefully, particularly the electrical connector, pins, latch mechanism, mounting points, cable connections and part-number markings.

Only the lock mechanism and any cables/brackets specifically shown in the listing photographs are included.

Any identifying colour/security markings applied to the part must remain intact in the event of a return.

Ideal genuine replacement for a faulty, intermittent, jammed or non-operational Volkswagen Transporter T5 / Caravelle front-left N/S passenger-side central-locking door latch, provided 3B2837015AG / 3B2837015AM and the vehicle locking configuration match the original unit.