For LAND ROVER DISCOVERY 4 L319 PARKING AID CONTROL MODULE ECU AH42-15K866-BG

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Genuine Land Rover Discovery 4 L319 Parking Aid PDC Control Module ECU – AH42-15K866-BG / LR024774

Genuine Land Rover/JLR used Parking Aid Control Module / PDC parking sensor ECU, suitable for selected Land Rover Discovery 4 L319 models equipped with the corresponding factory front and/or rear parking assistance system.

This electronic control module forms the central control unit for the vehicle’s ultrasonic parking sensor system, receiving signals from the parking sensors, processing obstacle-distance information and communicating with the vehicle’s electronic network to provide the driver with parking-distance warnings.

Part Number: AH42-15K866-BG

Alternative Number: AH4215K866BG

Land Rover OE / Service Number: LR024774

Part Type: Parking Aid Control Module / PDC Module / Parking Sensor ECU

Module Type: PAM – Parking Aid Module

System: Parking Distance Control / Parking Assistance

Application: Factory Front / Rear Parking Sensor System depending on vehicle specification

Vehicle Platform: 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 – 2009-2016

• Discovery 4 / LR4 applications

• Factory parking sensor equipped vehicles

• Front and rear parking assistance configurations depending on specification

• Petrol and diesel models where the corresponding parking aid system is fitted

• Automatic and manual applications depending on vehicle specification

The exact AH42-15K866-BG engineering number is specifically documented as a genuine Discovery 4 L319 Parking Aid Module. (GlobalParts)

2010-2011 DISCOVERY 4 / LR4 APPLICATION

The module is particularly well documented on early Discovery 4 / LR4 vehicles.

Used-module fitment information specifically identifies:

Land Rover LR4 / Discovery 4

• 2010

• 2011

• Base applications depending on market

• HSE applications depending on market

• Factory PDC / parking-distance system

This makes AH42-15K866-BG a particularly strong reference for an early Discovery 4 equipped with the corresponding parking aid system. (eBay)

ADDITIONAL JLR APPLICATIONS

The AH42-15K866 parking module family is also documented across selected JLR vehicles, including:

Range Rover Sport – L320

• Selected approximately 2010-2013 applications

• Factory parking aid equipped vehicles

Range Rover / Range Rover Vogue – L322

• Selected applications depending on production date and parking system

Jaguar XJ – X351

• Related AH42-15K866 parking-module applications are documented

However, different engineering suffixes and software/configurations exist.

Do not assume that a Range Rover or Jaguar module is automatically interchangeable with AH42-15K866-BG simply because the central 15K866 engineering number is the same.

TECHNICAL INFORMATION

The AH42-15K866-BG / LR024774 is an electronic controller responsible for managing the vehicle’s ultrasonic parking assistance system.

Its functions include:

• Receiving signals from the ultrasonic parking sensors

• Processing individual sensor information

• Calculating proximity to surrounding obstacles

• Detecting objects within the parking sensor operating range

• Controlling parking-distance warning operation

• Communicating parking-system information with other vehicle modules

• Monitoring the parking sensors for electrical/system faults

• Supporting front and/or rear parking assistance depending on vehicle configuration

• Communicating through the vehicle electronic network

When an obstacle approaches the vehicle, the ultrasonic sensors transmit information to the parking aid module.

The module processes this information and allows the vehicle to provide the appropriate audible and/or visual parking-distance warning to the driver.

PARKING AID / PDC SYSTEM INFORMATION

The complete Discovery 4 parking assistance system can include:

• Parking Aid Control Module – AH42-15K866-BG

• Front ultrasonic parking sensors

• Rear ultrasonic parking sensors

• Front bumper sensor wiring loom

• Rear bumper sensor wiring loom

• Parking aid switch / controls

• Instrument / infotainment warning system

• Audible warning components

• CAN communication network

• Associated body-control electronics

The exact configuration varies according to model year and vehicle equipment.

VEHICLE NETWORK INFORMATION

The parking aid module does not operate independently.

It communicates with other vehicle electronic systems over the vehicle’s network and uses information from other modules to determine when parking assistance should operate.

This allows the parking system to coordinate with functions such as:

• Reverse selection

• Vehicle ignition status

• Parking aid activation

• Vehicle speed information

• Driver information/warning systems

• Other body-control functions

The AH42-15K866-BG is documented as communicating with the vehicle’s bus architecture while processing signals from the ultrasonic sensors. (Global Parts)

COMMON SYMPTOMS OF A FAULTY PARKING AID MODULE

Replacement may be required due to:

• Parking sensors completely inoperative

• Front and rear parking sensors not working

• Parking aid unavailable warning

• Parking system fault message

• No audible parking warnings

• Sensors not communicating

• Intermittent parking sensor operation

• Multiple parking sensor fault codes

• Module communication failure

• Internal electronic failure

• Corroded electrical connections

• Water / moisture damage

• Physical damage to the module or connectors

IMPORTANT DIAGNOSTIC INFORMATION

A parking aid system failure does not automatically mean the AH42-15K866-BG module is faulty.

Before replacement, check:

• Individual parking sensors

• Front sensor wiring loom

• Rear sensor wiring loom

• Electrical connectors

• Module power supply

• Module ground

• Relevant fuses

• CAN communication

• Parking aid switch

• Vehicle battery condition

• Diagnostic fault codes

A single failed ultrasonic sensor or damaged bumper wiring loom can sometimes disable or significantly affect the operation of the complete parking assistance system.

Professional diagnostic scanning is recommended before replacing the module.

WATER / MOISTURE DAMAGE INFORMATION

Water ingress is particularly important when diagnosing JLR parking aid modules.

Owner and repair reports document parking aid modules being damaged by moisture/water entering the module or its electrical connectors. (FullFatRR)

If the original module shows:

• Corrosion

• Green deposits on connector pins

• Water staining

• Moisture inside the casing

• Repeated module failures

the surrounding area should be inspected for the source of the water leak before installing another module.

Otherwise, a replacement module may suffer the same damage.

PART NUMBER INFORMATION

Primary engineering number:

AH42-15K866-BG

Alternative formatting:

AH4215K866BG

Land Rover service/OE reference:

LR024774

These numbers are directly cross-referenced on Discovery 4 L319 parking sensor modules. (GlobalParts)

RELATED / ALTERNATIVE MODULE NUMBERS

The wider JLR parking aid module family includes references such as:

AH42-15K866-BE

AH42-15K866-BF

AH42-15K866-BG

Related JLR service references documented within this module family include:

LR012681

LR020807

LR021807

LR024774

Jaguar applications can also carry related service references including:

C2D16012

C2D18207

C2Z7475

These references are documented within the same broader parking-assist module family. (Go-Parts)

However, these numbers should not automatically be advertised as direct plug-and-play replacements for AH42-15K866-BG.

Vehicle specification, module software and parking-system configuration can differ.

ENGINEERING SUFFIX INFORMATION

The engineering number:

AH42-15K866-BG

contains an important revision suffix:

BG

Other visually similar modules can carry suffixes such as:

BE

BF

BG

There are owner reports of some different suffix versions functioning across similar JLR applications, but this should not be treated as guaranteed OE interchangeability without checking the vehicle configuration. (FullFatRR)

For an eBay listing, the safest approach is to advertise the exact number:

AH42-15K866-BG / LR024774

INSTALLATION

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

During installation:

• Check the replacement module number

• Inspect the module mounting area for moisture

• Inspect electrical connectors for corrosion

• Check connector pins carefully

• Inspect surrounding wiring

• Confirm power and ground supplies

• Secure the module correctly

• Reconnect all electrical connections

• Perform a diagnostic scan

• Clear applicable stored fault codes

• Test front parking sensors where fitted

• Test rear parking sensors

• Confirm audible/visual warnings operate correctly

Any source of water ingress should be repaired before fitting the replacement module.

PROGRAMMING / CODING

For a like-for-like AH42-15K866-BG replacement, used-part reports indicate that some vehicles accept the replacement without a dealer reset or programming. (FullFatRR)

However, because parking-system equipment can vary between vehicles:

Programming Required: Vehicle dependent

Configuration Required: Vehicle dependent

Diagnostic Check Recommended: Yes

A replacement module should not be guaranteed as universally plug-and-play.

Where the vehicle configuration differs, JLR-compatible diagnostic equipment may be required to check or configure the parking aid system.

IMPORTANT COMPATIBILITY NOTE

Before ordering, please compare:

AH42-15K866-BG

AH4215K866BG

LR024774

Also check:

• Vehicle model

• Vehicle production year

• Factory parking sensor specification

• Front / rear parking sensor configuration

• Engineering-number suffix

• Electrical connectors

• Connector pin arrangement

• Module casing

• Mounting points

• Existing module label

• Listing photographs

Do not rely solely on “Land Rover Discovery 4 L319” when ordering.

Several revisions of the 15K866 Parking Aid Module were used across Land Rover and Jaguar vehicles.

For the safest replacement, match AH42-15K866-BG / LR024774 directly with the original module.

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, AH42-15K866-BG identification, connectors, mounting points and overall condition.

As with any used electronic module, correct vehicle compatibility and diagnosis should be confirmed before installation.

Ideal genuine Land Rover replacement Parking Aid / PDC parking sensor control module ECU for a compatible Land Rover Discovery 4 L319.