LAND ROVER DISCOVERY 4 2010 RHD REAR RIGHT DOOR CONTROL UNIT BH42-14D620-AA

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♻️ GENUINE LAND ROVER DISCOVERY 4 L319 REAR DOOR CONTROL MODULE ECU – BH42-14D620-AA / LR023340

Genuine used Land Rover Discovery 4 L319 rear door control module / Rear Door Module (RDM), removed from the rear right / O/S driver’s-side rear door of a 2010 RHD Discovery 4.

This electronic module controls and communicates with electrical equipment installed within the rear door, including the electric window and central locking system.

Engineering Part Number: BH42-14D620-AA

Alternative Format: BH4214D620AA

OE / Service Number: LR023340

Additional Cross References: LR016363 / LR020132 / LR021806 / LR023340

Part Type: Rear Door Control Module / Rear Door ECU / RDM

Donor Position: Rear Right / O/S

UK RHD Position: Driver Side Rear Door

Applicable Position: Rear Left or Rear Right where matching

Donor Vehicle: 2010 Land Rover Discovery 4 L319

Manufacturer: Land Rover Genuine OE

Condition: Genuine Used

Compatibility

Confirmed applications include:

• Land Rover Discovery 4 / Discovery IV L319

• Land Rover LR4 L319

• 2010 Discovery 4

• 2.7 TDV6 applications where matching module is fitted

• 3.0 TDV6 / SDV6 – 306DT

• Petrol applications using the identical rear door electronics

• Rear Right / O/S Door

• Rear Left / N/S Door

The exact BH42-14D620-AA number is documented on Discovery 4 L319 vehicles, including 2010 3.0 TDV6 306DT applications. (BreakerYard)

A separate 2010 Discovery 4 / LR4 parts listing also identifies BH4214D620AA with OE references LR016363, LR020132, LR021806 and LR023340. (Wolf Auto Parts)

Important Position Information

This particular unit was removed from:

Rear Right / O/S / Driver-Side Rear Door on a UK RHD vehicle.

However, BH42-14D620-AA is not strictly right-side-specific.

Parts catalogue data identifies this module for:

• Rear Right / O/S

• Rear Left / N/S

Therefore, the same module can be used on either rear door where the BH42-14D620-AA specification and vehicle configuration match. (Autoparts24)

Additional Compatible Applications

The BH42-14D620-AA / LR023340 module family is also documented on selected:

• Range Rover Sport L320

• Range Rover L322

• Freelander 2 L359

• Jaguar XF X250

• Jaguar XJ X351

Compatibility on these additional vehicles depends on model year, equipment and module software/configuration.

Always match the complete engineering number before purchasing for another model. (Autoparts24)

Technical Information

The Rear Door Module forms part of the vehicle’s body electrical network.

Depending on vehicle specification, it manages or communicates with functions including:

• Electric window motor

• Window switch

• Central locking actuator

• Door locking/unlocking commands

• Child-lock functions

• Door electrical components

• Vehicle body electronics

The module communicates with other vehicle control systems through the vehicle’s electronic network. (Autoparts24)

Rear Door Electrical System Information

The rear door contains several separate electrical and mechanical components.

A fault with the rear door can therefore originate from:

• Rear Door Module

• Window motor

• Window regulator

• Door lock actuator

• Window switch

• Door wiring loom

• Connector damage

• Broken wiring between the body and door

• Vehicle body-control electronics

Correct diagnosis is recommended before replacing the module.

Common Symptoms / Reasons for Replacement

• Rear electric window not operating

• Window operating intermittently

• Rear door not locking or unlocking correctly

• Central locking fault affecting one rear door

• Door electrical functions completely inoperative

• Module communication fault

• Diagnostic fault code relating to rear door electronics

• Water or moisture damage

• Corroded electrical connections

• Internal electronic failure

• Original module damaged during door repair

Important Diagnostic Information

Before replacing the module, check:

• Door wiring loom

• Wiring between the door and vehicle body

• Electrical connectors

• Relevant fuses

• Window motor

• Window regulator

• Door lock actuator

• Window switch

• Vehicle battery voltage

• Relevant diagnostic fault codes

A failed window or door lock does not automatically mean the control module is faulty.

Mechanical regulator faults, broken door wiring and failed lock actuators can produce similar symptoms.

Installation

The module is installed inside the rear-door assembly.

During replacement:

• Disconnect the vehicle battery where appropriate

• Compare the original and replacement modules

• Confirm BH42-14D620-AA

• Inspect all electrical connectors

• Check terminals for corrosion or moisture

• Secure the module correctly

• Reconnect the door wiring carefully

• Test window and locking functions after installation

Programming / Coding

⚠️ Diagnostic configuration/coding may be required following replacement.

Replacement modules can contain vehicle-specific configuration or software information.

A used replacement should therefore be matched as closely as possible to the original unit, and suitable Land Rover-compatible diagnostic equipment may be required to configure the module correctly to the vehicle.

A specialist supplier specifically lists BH4214D620AA as requiring vehicle/VIN configuration after installation. (Wolf Auto Parts)

After installation, also check the electric window one-touch / anti-trap operation, as window initialisation may be necessary following electrical disconnection or module replacement.

Important Compatibility Note

⚠️ Please match the complete part number before purchasing.

Confirm:

• BH42-14D620-AA

• BH4214D620AA

• LR023340 where applicable

• Electrical connectors

• Module hardware/software specification

• Rear-door application

• Vehicle equipment

• Listing photographs

Do not confuse this rear door module with similar-looking front door modules. For example, BH42-14D618-AA is associated with front-door applications and should not be assumed interchangeable. (Autoparts24)

Do not purchase solely by vehicle model and year. Matching the complete engineering number is strongly recommended.

Condition

Genuine used Land Rover electronic control module.

Removed from a 2010 Land Rover Discovery 4 L319 RHD rear right / O/S door.

May show normal signs of previous use, removal and storage, including light marks or cosmetic wear to the housing.

Please inspect all listing photographs carefully for the exact part number, connector configuration and overall condition.

♻️ Genuine Land Rover Discovery 4 L319 rear door control module BH42-14D620-AA / LR023340 – removed from the rear right O/S door and also suitable for the rear left door where the identical module specification is fitted.