Land Rover Discovery 4 L319 09-16 Keyless Entry Receiver AH22-19H440-AG

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Genuine Land Rover Discovery 4 L319 Keyless Entry Passive Start Control Module – AH22-19H440-AG

Genuine Land Rover/JLR used Keyless Entry / Passive Entry & Passive Start control module, suitable for selected Land Rover Discovery 4 L319 models equipped with the corresponding keyless access and start system.

This electronic control module forms part of the vehicle’s security, access and starting-authorisation system, communicating with the vehicle’s smart keys, passive-entry antennas and other body-control electronics to manage authorised vehicle access and starting.

Part Number: AH22-19H440-AG

Alternative Number Format: AH2219H440AG

Part Type: Keyless Entry Control Module / Passive Entry Module / Keyless Start Module

System: Vehicle Access / Security / Passive Entry & Start

Application: Keyless Entry / Keyless Start

Vehicle Platform: Land Rover Discovery 4 L319

Manufacturer: Land Rover / JLR

Condition: Used Genuine Land Rover Part

COMPATIBILITY

Land Rover Discovery 4 – L319

Directly documented applications include:

• Discovery 4 L319 – 2009-2013

• Factory keyless-entry equipped vehicles

• Passive-entry applications depending on specification

• Passive-start applications depending on specification

• Petrol and diesel vehicles where the corresponding security/access system is fitted

A genuine used-part specialist specifically identifies AH22-19H440-AG as:

Discovery 4 Keyless Control Module – 2009 to 2013

The same engineering number is also documented more broadly on Discovery 4/LR4 applications, but exact model-year compatibility should always be determined from the original module and vehicle specification.

ADDITIONAL JLR APPLICATIONS

The AH22-19H440-AG / AH2219H440AG engineering number is not exclusive to the Discovery 4.

Documented applications also include selected:

Range Rover Sport – L320

• Keyless-entry / passive-start equipped vehicles

• 2010-2013 applications directly documented

Range Rover Evoque – L538

• Selected 2011-2015 applications documented with AH2219H440AG

The same module number has also been recorded on selected Jaguar XJ X351 vehicles.

IMPORTANT: These vehicles can have different security configurations and software, so cross-model fitment should not be assumed simply because the casing and engineering number appear similar.

TECHNICAL INFORMATION

The AH22-19H440-AG module forms part of the JLR vehicle access and security architecture.

Its functions can include:

• Keyless vehicle entry

• Passive vehicle unlocking

• Passive vehicle locking

• Smart-key detection

• Key authentication

• Passive-start authorisation

• Communication with vehicle access antennas

• Communication with body/security control electronics

• Supporting anti-theft system operation

• Providing authorised access information to other vehicle control modules

When the driver approaches or enters the vehicle with an authorised smart key, the system uses antennas and control modules to determine whether a valid key is present.

The keyless control module processes this information and communicates with the relevant vehicle systems to permit functions such as unlocking and engine-start authorisation.

PASSIVE ENTRY / PASSIVE START SYSTEM INFORMATION

The complete system can involve several separate components, including:

• Keyless Entry Control Module – AH22-19H440-AG

• Smart key / remote fob

• Passive-entry antennas

• Interior key-detection antennas

• Exterior door-handle sensors

• Body control electronics

• Security / immobiliser system

• Start/Stop button

• RF receiver components

• Vehicle wiring loom

• CAN communication network

Because these components operate together, a keyless-entry fault does not automatically mean the AH22-19H440-AG module has failed.

VEHICLE NETWORK / SECURITY SYSTEM INFORMATION

This module communicates with other electronic systems within the vehicle rather than operating independently.

Depending on vehicle configuration, communication can involve:

• Body-control electronics

• Security/immobiliser system

• Smart-key system

• Door locking system

• Engine-start authorisation

• Passive-entry antennas

• Other CAN-connected control modules

Correct communication between these components is essential for normal passive-entry and starting operation.

COMMON SYMPTOMS / REASONS FOR REPLACEMENT

Replacement may be considered due to:

• Keyless entry not working

• Vehicle failing to detect smart key

• Passive locking not functioning

• Passive unlocking not functioning

• Intermittent smart-key detection

• Vehicle displaying key-not-detected warnings

• Passive-start problems

• Module communication faults

• Central locking / access-related diagnostic faults

• Internal electronic module failure

• Water or moisture damage

• Damaged electrical connector

• Replacement following vehicle electrical repair

IMPORTANT DIAGNOSTIC INFORMATION

A “Smart Key Not Found” or keyless-entry problem does not automatically prove this module is defective.

Before replacement, check:

• Smart-key battery

• Spare smart key where available

• Vehicle battery condition and voltage

• Passive-entry antennas

• Interior key-detection antennas

• Door-handle sensors

• Module power and ground

• Wiring and electrical connectors

• Relevant fuses

• CAN communication

• Body/security system diagnostic fault codes

A weak vehicle battery or smart-key battery can sometimes produce symptoms resembling a keyless-system fault.

Professional diagnostic testing is recommended before replacing security/access modules.

PART NUMBER INFORMATION

Primary engineering number:

AH22-19H440-AG

Alternative formatting:

AH2219H440AG

Cross-reference information associated with this module family includes service numbers such as:

LR020274

LR021889

LR031379

LR032290

LR042875

LR052873

LR059765

LR067251

LR071386

Later replacement/module-family references can also appear with different engineering numbers, including:

DPLA-19H440-BF

IMPORTANT: These numbers can represent different revisions and supersessions within the JLR keyless-control-module family.

They should not automatically be treated as direct plug-and-play substitutes without confirming VIN, equipment specification and software/configuration.

ENGINEERING NUMBER REVISION INFORMATION

The AH22-19H440 module family exists with numerous engineering suffix revisions.

JLR regulatory documentation lists variants including:

AH22-19H440-AB

AH22-19H440-AC

AH22-19H440-AD

AH22-19H440-AE

AH22-19H440-AF

AH22-19H440-AG

AH22-19H440-AH

and numerous later suffixes.

The suffix is important.

A module carrying AH22-19H440-AF, AH, AJ, etc. should not automatically be assumed identical to AH22-19H440-AG without confirming the JLR supersession and vehicle configuration.

SECURITY / IMMOBILISER INFORMATION

This is not simply a convenience central-locking relay.

The module is associated with the vehicle’s keyless access and starting/security system, meaning replacement can involve security-related configuration.

The vehicle must correctly recognise the replacement module within the overall electronic architecture for all relevant functions to operate correctly.

INSTALLATION

Installation should be performed using the appropriate Land Rover/JLR workshop procedure.

During installation:

• Check vehicle battery condition

• Disconnect the battery where specified by JLR procedure

• Inspect module connectors

• Check for corrosion or moisture

• Inspect surrounding wiring

• Confirm the replacement module number

• Secure the module correctly

• Reconnect the electrical system

• Perform diagnostic checks

• Confirm smart-key detection

• Test passive entry

• Test central locking

• Confirm correct vehicle starting operation

PROGRAMMING / CODING

Programming / Configuration May Be Required.

A used AH22-19H440-AG module should not be assumed to be universally plug-and-play.

Depending on the vehicle and replacement-module history, professional diagnostic work may be required for:

• Vehicle configuration

• Module initialisation

• Security-system synchronisation

• Smart-key / immobiliser related setup

• Diagnostic configuration

Replacement-module suppliers also specifically warn that AH2219H440AG may require additional programming to function correctly in another vehicle.

JLR-compatible diagnostic equipment is recommended.

IMPORTANT COMPATIBILITY NOTE

Before ordering, please compare:

AH22-19H440-AG

AH2219H440AG

Also check:

• Vehicle model

• Vehicle production date

• Factory keyless-entry specification

• Passive-entry / passive-start equipment

• Existing module suffix

• JLR service/OE number

• Electrical connectors

• Module casing

• Vehicle VIN/configuration

• Listing photographs

Do not rely solely on “Land Rover Discovery 4” when ordering.

Different revisions of the keyless/access control module were fitted across Discovery 4 production and other JLR models.

For the safest replacement, match AH22-19H440-AG directly with the original module and confirm compatibility using the vehicle VIN where possible.

CONDITION

Used Genuine Land Rover / JLR Electronic Module.

Normal cosmetic marks, scratches and signs of previous installation may be present.

Please inspect all listing photographs carefully for the exact label, engineering number, connectors, casing, mounting points and overall condition.

As this is a used security/access electronic module, programming or vehicle-specific configuration may be required after installation.

Ideal genuine Land Rover replacement Keyless Entry / Passive Entry & Passive Start control module for a compatible Land Rover Discovery 4 L319.