LAND ROVER DISCOVERY 4 2010 L319 AMPLIFIER 8H42-19C164-BB

#114

Genuine Land Rover Discovery 4 L319 Harman Kardon Logic 7 Audio Amplifier – 8H42-19C164-BB – 2010

Genuine Land Rover/JLR used Harman Kardon Logic 7 premium audio sound amplifier, removed from a 2010 Land Rover Discovery 4 L319.

This module forms part of the vehicle’s factory premium audio system and provides amplification and audio distribution to the vehicle’s speaker system.

Part Number: 8H42-19C164-BB

Alternative Number Format: 8H4219C164BB

Related OE / Service Reference: LR015240 – documented within the premium audio amplifier application family; exact interchange must be checked

Part Type: Audio Amplifier / Sound Amplifier / Stereo Amplifier / Logic 7 Amplifier

Audio System: Harman Kardon Logic 7 / Premium Sound System

Vehicle Platform: Discovery 4 L319

Donor Vehicle: 2010 Land Rover Discovery 4 HSE TDV6

Donor Engine: 3.0 TDV6 – 306DT

Donor Gearbox: ZF 6HP28 Automatic

Donor Drive: RHD

Manufacturer: Harman Kardon / Land Rover JLR

Condition: Used Genuine OEM Part

COMPATIBILITY

Verified applications for 8H42-19C164-BB include selected:

Land Rover Discovery 4 / LR4 – L319

• 2009-2016 application is documented by specialist parts sources

• 2010 directly verified

• 2011 LR4 direct donor application also documented

• HSE and other models equipped with the corresponding premium Harman Kardon / Logic 7 audio system

• Petrol and diesel vehicles depending on audio specification

A direct UK donor record confirms this exact:

8H42-19C164-BB

amplifier from a:

2010 Land Rover Discovery 4 HSE TDV6 Automatic

Engine Code: 306DT

Gearbox: ZF 6HP28

RHD

This provides strong direct evidence for your 2010 Discovery 4 L319 application.

ADDITIONAL VERIFIED VEHICLE APPLICATIONS

The 8H42-19C164-BB amplifier is also documented for selected:

Range Rover Sport – L320

Approximately 2007-2013

Range Rover – L322

Selected approximately 2006-2013 vehicles

It is also documented within earlier Discovery 3 L319 premium-audio applications.

However, this does not mean every amplifier from these vehicles is automatically interchangeable.

Audio-system specification, software generation, connectors and exact engineering number must be checked.

IMPORTANT AUDIO SYSTEM COMPATIBILITY

This amplifier is intended for vehicles equipped with the corresponding:

HARMAN KARDON / LOGIC 7 / PREMIUM AUDIO SYSTEM

It should not automatically be assumed compatible with:

• Standard/base audio systems

• Different amplifier specifications

• Later Meridian audio systems

• Different MOST network generations

• Different speaker configurations

• Different amplifier hardware/software revisions

The safest replacement is an amplifier carrying the exact:

8H42-19C164-BB

engineering number.

TECHNICAL INFORMATION

The audio amplifier is a major component of the Discovery 4’s premium entertainment system.

Its functions include:

• Amplifying audio signals for the vehicle speakers

• Driving multiple speaker channels

• Supporting the factory premium surround-sound system

• Processing/distributing audio signals

• Working with the vehicle’s head unit/audio control system

• Communicating with other multimedia components

• Supporting the factory Harman Kardon speaker arrangement

• Maintaining the intended factory audio output and sound balance

Unlike a basic two-channel amplifier, the premium system uses a multi-channel amplifier designed around the factory speaker configuration.

HARMAN KARDON LOGIC 7 SYSTEM INFORMATION

Logic 7 is associated with Harman Kardon’s premium multi-channel vehicle audio systems.

Depending on the exact Discovery 4 specification, the premium system can use multiple speakers positioned around the cabin to provide a more immersive sound field than the standard audio system.

The amplifier is therefore matched to the vehicle’s:

• Speaker configuration

• Audio-system specification

• Multimedia architecture

• Vehicle wiring

• Network configuration

• Software/hardware generation

For this reason, amplifier compatibility should be determined by the exact part number and audio specification, not simply by vehicle model.

MOST FIBRE-OPTIC SYSTEM INFORMATION

Discovery 4 multimedia systems of this generation use a MOST fibre-optic network for communication between compatible infotainment components.

Depending on vehicle specification, the network can include components such as:

• Audio amplifier

• Head unit/audio control module

• Bluetooth/telephone module

• DAB radio module

• Navigation/infotainment components

• Other multimedia modules

A failure of one module or a break in the fibre-optic network can cause several apparently unrelated infotainment functions to stop operating.

Therefore, a no-sound condition does not automatically prove the amplifier itself is faulty.

COMMON SYMPTOMS OF A FAULTY AMPLIFIER

A failing amplifier or associated audio-system fault may cause:

• No sound from any speakers

• Intermittent audio

• Audio cutting in and out

• Distorted sound

• Crackling or popping

• Some speaker channels not working

• Very low audio output

• Amplifier failing to wake up

• Infotainment system communication faults

• MOST fibre-optic network faults

• Audio system remaining muted

• Battery drain in certain electrical-fault conditions

Water or moisture contamination can also damage audio modules and their electrical connections.

IMPORTANT DIAGNOSTIC INFORMATION

Before replacing the amplifier, check:

• Amplifier power supply

• Ground/earth connection

• Fuses

• Electrical connectors

• Connector pins

• Signs of corrosion

• Water/moisture ingress

• Fibre-optic connections

• MOST network operation

• Speaker wiring

• Vehicle fault codes

• Head unit operation

• Other multimedia modules

If the amplifier has failed because of water ingress, the source of the leak should be located and repaired before installing the replacement.

Otherwise, the replacement module may also become damaged.

MOST NETWORK DIAGNOSTICS

Because the amplifier forms part of the infotainment architecture, diagnosis may require suitable Land Rover/JLR diagnostic equipment.

If a MOST network component fails or becomes disconnected, the network ring can be interrupted.

Symptoms can include:

No audio

No communication with amplifier

Multiple multimedia modules offline

Intermittent infotainment operation

A MOST fibre-optic bypass loop can be useful during professional diagnosis to isolate a faulty module.

PART NUMBER / REVISION INFORMATION

Primary engineering number:

8H42-19C164-BB

Alternative format:

8H4219C164BB

A documented related service reference is:

LR015240

However, Land Rover/JLR used multiple amplifier revisions and engineering numbers across the Discovery, Range Rover Sport and Range Rover platforms.

Related-looking amplifier numbers should not automatically be treated as direct replacements.

The suffix:

-BB

is particularly important.

For a straightforward used replacement, matching the complete:

8H42-19C164-BB

number is strongly recommended.

2010 DISCOVERY 4 APPLICATION

For your item:

Vehicle: Land Rover Discovery 4

Platform: L319

Year: 2010

Part: Premium Audio Amplifier

Audio System: Harman Kardon / Logic 7

Engineering Number: 8H42-19C164-BB

Alternative Number: 8H4219C164BB

A direct donor record confirms the exact amplifier on a:

2010 Discovery 4 HSE TDV6

3.0 Diesel

306DT Engine

ZF 6HP28 Automatic Gearbox

Right-Hand Drive

ENGINE COMPATIBILITY

The amplifier is not engine-specific.

The direct 2010 donor vehicle uses the:

3.0 TDV6 306DT

engine, but amplifier compatibility is determined by the vehicle’s audio and infotainment specification, not engine size.

It may therefore be found on compatible petrol and diesel vehicles equipped with the correct premium audio system.

INSTALLATION

Installation should be carried out according to the appropriate Land Rover workshop procedure.

Before installation:

• Disconnect the vehicle battery correctly

• Confirm 8H42-19C164-BB matches the original amplifier

• Compare all electrical connectors

• Compare fibre-optic connections

• Inspect connectors for corrosion

• Inspect the installation area for moisture

• Check wiring for damage

• Avoid bending or damaging fibre-optic cables

• Mount the amplifier securely

• Reconnect all connectors correctly

• Reconnect the battery according to the correct procedure

• Test the complete audio system

• Scan the vehicle for relevant faults if required

Do not look directly into an active fibre-optic connection.

PROGRAMMING / CODING

Programming / Configuration: Vehicle dependent

A used replacement amplifier should not automatically be assumed to be plug-and-play in every Discovery 4.

Depending on vehicle specification and replacement module revision, the amplifier may require:

• Vehicle configuration

• Module programming

• Software configuration

• Diagnostic initialization

• Fault-code clearing

• Verification of the MOST network

For the greatest chance of straightforward compatibility, use an amplifier with the same complete engineering number and matching audio-system specification.

IMPORTANT COMPATIBILITY NOTE

Before ordering, please compare:

8H42-19C164-BB

8H4219C164BB

Also check:

• Land Rover Discovery 4 L319

• Vehicle production year

• Original amplifier part number

• Complete -BB suffix

• Harman Kardon / Logic 7 specification

• Premium audio system specification

• Electrical connectors

• Fibre-optic connections

• Connector positions

• Amplifier casing

• Mounting points

• Vehicle infotainment equipment

• Listing photographs

Do not order solely by “Discovery 4 amplifier”.

Discovery 4 vehicles were produced with different audio systems and amplifier configurations.

For the safest replacement, match 8H42-19C164-BB directly with the original amplifier.

CONDITION

Used Genuine Land Rover / Harman Kardon OEM Audio Amplifier.

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

Please inspect all listing photographs carefully for the exact 8H42-19C164-BB number, connectors, casing, mounting points and overall condition.

Electrical connectors should be checked for signs of corrosion or moisture before installation.

Ideal genuine OEM replacement Harman Kardon Logic 7 premium stereo audio sound amplifier for a compatible Land Rover Discovery 4 L319 using the 8H42-19C164-BB specification.