Land Rover Discovery 4 L319 USB Audio Stereo Control Unit Module AH42-18C941-AG

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GENUINE LAND ROVER DISCOVERY 4 L319 USB AUDIO STEREO MULTIMEDIA CONTROL MODULE AH42-18C941-AG LR019222

Genuine used Land Rover / Harman Becker USB audio multimedia interface control module, suitable for selected Land Rover Discovery 4 L319 vehicles equipped with the corresponding factory audio / multimedia system.

This module forms part of the vehicle’s factory infotainment system and provides the electronic interface used for compatible USB / portable audio / multimedia functions.

Engineering Number: AH42-18C941-AG

Alternative Number: AH4218C941AG

Alternative Format: AH42 18C941 AG

Land Rover OE Cross-Reference: LR019222

Part Type: USB Audio Control Module / Multimedia Interface ECU

System: Factory Audio / Infotainment / Multimedia

Application: USB / Portable Audio Interface

Primary Vehicle: Land Rover Discovery 4

Chassis: L319

Donor Year: 2010

Manufacturer: Land Rover / JLR / Harman Becker application

Condition: Genuine Used OEM Part

COMPATIBILITY

The exact AH42-18C941-AG / AH4218C941AG module is directly documented on the Land Rover Discovery 4 L319.

LAND ROVER DISCOVERY 4 / DISCOVERY IV / LR4 L319

Approx. 2009–2016

Documented applications include early 2010 Discovery 4 vehicles as well as later L319 vehicles equipped with the corresponding factory multimedia system.

Potential applications include selected:

• Discovery 4 2.7 TDV6 – 276DT

• Discovery 4 3.0 TDV6 – 306DT

• Discovery 4 3.0 SDV6 – 306DT

• Discovery 4 3.0 Petrol – selected markets

• Discovery 4 5.0 V8 Petrol – 508PN – selected markets

• LR4 North American specification vehicles

The exact AH42-18C941-AG number is documented specifically on 2010 Discovery 4 L319 applications.

DISCOVERY 4 3.0 TDV6 / SDV6

There is particularly strong used-parts evidence for this module on 3.0 TDV6 Discovery 4 vehicles.

Documented examples include:

• Discovery 4 L319 3.0 TDV6

• Discovery 4 L319 3.0 SDV6

• 2010 Discovery 4

• 2011 Discovery 4

• Additional 2009–2016 Discovery 4 multimedia-equipped vehicles

RANGE ROVER SPORT L320 – ADDITIONAL COMPATIBILITY

The exact AH42-18C941-AG / AH4218C941AG module is also extensively documented on:

Range Rover Sport L320

Particularly around the 2010–2013 model period.

Potential applications include selected:

• 3.0 TDV6

• 3.0 SDV6

• 3.6 TDV8

• 5.0 V8

• 5.0 Supercharged V8

The vehicle must have the corresponding factory infotainment / USB audio system.

RANGE ROVER L322

The AH42-18C941-AG module is also advertised and cross-referenced for selected Range Rover L322 applications from the same JLR infotainment generation.

Potential applications include selected approximately:

2010–2012 Range Rover L322

However, L322 compatibility should be confirmed by matching the AH42-18C941-AG / LR019222 number and electrical connections.

IMPORTANT: Engine size is not the primary compatibility factor for this component.

Compatibility depends mainly on:

• Factory audio system

• Infotainment specification

• USB/media equipment

• Vehicle production date

• Electrical connectors

• Module hardware/software generation

• Original engineering/OE number

OE / ENGINEERING NUMBER INFORMATION

Primary number:

AH42-18C941-AG

Also written as:

AH4218C941AG

AH4218C941-AG

AH42 18C941 AG

A documented Land Rover OE cross-reference is:

LR019222

When replacing the module, the safest method is to match the original AH42-18C941-AG engineering number directly.

TECHNICAL INFORMATION

This component is part of the factory Land Rover multimedia / audio interface system.

Its role is to provide an electronic interface between compatible external media connections and the vehicle’s factory infotainment architecture.

Depending on vehicle specification, the system can support functions associated with:

• USB audio input

• Portable media devices

• Digital audio/media connection

• iPod integration on compatible systems

• Factory stereo/audio system

• Multimedia source selection

• Vehicle infotainment system

The module processes the appropriate media/interface signals and communicates with the vehicle’s factory audio system.

USB / PORTABLE AUDIO SYSTEM

On suitably equipped Discovery 4 vehicles, external media devices can be connected to the vehicle’s infotainment system.

Depending on the vehicle’s specification and connected device, the system can allow functions such as:

• Playing music from compatible USB media

• Portable audio playback

• iPod/media-device integration

• Track selection through the factory infotainment system

• Audio source selection

• Playback through the vehicle’s factory speakers

Available functionality varies according to the infotainment generation and vehicle specification.

HARMAN BECKER AUDIO SYSTEM

The AH42-18C941-AG module is widely identified in the used-parts market as a Harman Becker audio/USB interface module.

It forms part of the wider factory audio architecture rather than being the main audio amplifier itself.

THIS IS NOT THE MAIN AMPLIFIER.

Discovery 4 vehicles can contain several separate audio/infotainment modules, including:

• Audio amplifier

• Radio/tuner components

• Bluetooth/telephone module

• DAB receiver where equipped

• USB/media interface module

• Display/touchscreen

• Rear Seat Entertainment components where equipped

The AH42-18C941-AG should therefore be identified by its exact engineering number.

COMMON SYMPTOMS / REASONS FOR REPLACEMENT

• USB input not working

• USB device not recognised

• iPod/media device not recognised

• No audio from connected USB device

• Multimedia source unavailable

• Intermittent USB connection

• Audio source disconnecting unexpectedly

• Infotainment unable to communicate with media interface

• Internal module failure

• Damaged electrical connector

• Water/moisture damage

• Replacement during infotainment repair

• Module missing following previous vehicle repairs

IMPORTANT DIAGNOSTIC INFORMATION

A non-working USB or multimedia input does not automatically mean this module has failed.

Before replacement, check:

• USB socket

• USB connection cable

• Vehicle fuses

• Module power supply

• Ground connections

• Electrical connectors

• Wiring continuity

• Infotainment system operation

• Compatible media device

• Audio source settings

• Related infotainment modules

• Vehicle diagnostic fault codes

Testing with another known-compatible USB/media device is recommended before condemning the module.

VEHICLE NETWORK / DIAGNOSTICS

The module operates as part of the vehicle’s integrated multimedia/electrical architecture.

Suitable Land Rover diagnostic equipment can be used to check:

• Module communication

• Stored infotainment fault codes

• Network communication

• Power supply faults

• Configuration issues

• Related multimedia components

If several infotainment functions have failed simultaneously, diagnosis of the complete system is recommended before replacing individual modules.

PROGRAMMING / CODING

For a replacement module with the same AH42-18C941-AG / LR019222 specification, additional programming may not always be necessary.

However, because the module forms part of the vehicle’s integrated infotainment system, vehicle configuration/software differences can affect operation.

Depending on donor and recipient vehicle specification, diagnostic configuration or initialisation may be required.

For this reason, installation by someone familiar with Land Rover/JLR infotainment systems is recommended.

INSTALLATION

Before fitting, compare:

• AH42-18C941-AG number

• LR019222 where applicable

• Electrical connectors

• Connector pin arrangement

• Module casing

• Mounting points

• Vehicle infotainment specification

• USB/media equipment

Disconnect the vehicle electrical system according to the correct Land Rover workshop procedure before removing or installing electronic modules.

After installation, test:

• USB connection

• Media-device recognition

• Audio playback

• Source selection

• Infotainment operation

IMPORTANT COMPATIBILITY NOTE

Land Rover used several different multimedia/audio modules throughout Discovery 4 production.

A module that looks physically identical is not necessarily compatible.

Before ordering, please match:

AH42-18C941-AG

AH4218C941AG

and where applicable:

LR019222

Also compare:

• Electrical connectors

• Connector pins

• Hardware configuration

• Factory infotainment system

• Vehicle production year

• Original module label

Matching AH42-18C941-AG directly with the original module is the safest method of confirming compatibility.

CONDITION

Genuine used Land Rover OEM USB Audio / Multimedia Control Module.

Removed from a Land Rover Discovery 4 L319.

Normal cosmetic signs of previous installation, use, removal and storage may be present.

Please inspect all listing photographs carefully and compare the:

• Part number

• Module label

• Electrical connectors

• Connector pins

• Casing

• Mounting points

with your original unit before ordering.

Ideal genuine replacement for a faulty or damaged factory USB audio / multimedia interface module on compatible Land Rover Discovery 4 L319, Range Rover Sport L320 and selected Range Rover L322 vehicles where AH42-18C941-AG / AH4218C941AG / LR019222 and the infotainment configuration match the original unit.