JLRTB02127NAS4

TECHNICAL BULLETIN
08 JAN 2025

© Jaguar Land Rover North America, LLC
NOTE: The information in Technical Bulletins is intended for use by trained, professional
Technicians with the knowledge, tools, and equipment required to do the job properly
and safely. It informs these Technicians of conditions that may occur on some vehicles,
or provides information that could assist in proper vehicle service. The procedures
should not be performed by 'do-it-yourselfers'. If you are not a Retailer, do not assume
that a condition described affects your vehicle. Contact an authorized Land Rover
service facility to determine whether this bulletin applies to a specific vehicle.
INFORMATION

This bulletin supersedes TSB JLRTB02127NAS3/2024 dated 17 DEC 2024, which
should either be destroyed or clearly marked to show it is no longer valid (e.g. with a line
across the page). Only refer to the electronic version of this Technical Bulletin in TOPIx.
Changes are highlighted in blue

SECTION:

303-03A

SUBJECT
/CONCERN:

Engine Coolant Level Low Message Displayed on Instrument Panel

AFFECTED VEHICLE RANGE:

MODEL:
Range Rover (LK)

MODEL YEAR:
2022-2024

VIN:
000001-234058

ASSEMBLY PLANT:
Solihull

MODEL:
Range Rover Sport (L1)

MODEL YEAR:
2023-2024

VIN:
000001-400762

ASSEMBLY PLANT:
Solihull

MARKETS:

NORTH AMERICA

CONDITION
SUMMARY:

SITUATION:
A customer may express a concern that there is a 'Coolant Level Low' message
displayed on the instrument panel cluster, or that the coolant level requires frequently
topping up, or that the 'Coolant Level Low' message is displayed when the coolant level
is at minimum or above.
CAUSE:
Permeation of water content from the engine coolant through plastic pipes.
ACTION:
Follow the Service Instruction below.

The following applies to:



All Vehicles

PARTS:

NOTES:
*When stock of 104123458 is depleted order 104123633.
**An allowance equivalent to £5.00 Sterling has been allocated to locally
source engine coolant.

PART NUMBER

DESCRIPTION

QUANTITY

*104123458 or 104123633

Coolant Expansion Tank

1

**ZZZ001

Engine Coolant

£5

The following applies to:



INGENIUM I6 3.0L Petrol / INGENIUM I6 3.0L Petrol PHEV Vehicles Only

PARTS:

NOTES:
*When stock of 202123501 is depleted order 202123527.
**The 4 undershield fixing retainers (LR165498) are required for the Plug-in
Hybrid Electric Vehicle (PHEV) vehicles only.

PART NUMBER

DESCRIPTION

QUANTITY

*202123501 or 202123527

Fuel Supply Line

1

202123508

Fuel Supply Line to Expansion Tank Clip

1

LR185830

Fuel Supply Line to Vapour Damper Bracket Clip

1

**LR165498

Undershield Fixing Retainer

4

SPECIAL TOOL(S)



JLR-303-1720-01
Adaptor - Coolant
Expansion Tank
Pressure Test

GENERAL EQUIPMENT

EQUIPMENT NAME
Cooling system pressure tester

WARRANTY:

NOTES:
Repair procedures are under constant review, and therefore times are subject
to change; those quoted here must be taken as guidance only. Use TOPIx to
obtain the latest repair time.
The JLR claims submission system requires the use of causal part numbers.
Labor only claims must show the causal part number with a quantity of zero.

DESCRIPTION
Cooling System Inspection
Cooling System Pressure Test

SRO

TIME
(HOURS)

CONDITION
CODE

CAUSAL
PART

99.01.01.10

0.1

*

LR151660

26.10.07

0.2

*

LR151660

SRO

TIME
(HOURS)

CONDITION
CODE

CAUSAL
PART

Coolant Expansion Tank

26.15.01

0.5

*

LR151660

Fuel Supply Line - Range Rover INGENIUM I6 3L Petrol

19.43.42

3.0

*

LR178362

Fuel Supply Line - Range Rover Sport INGENIUM I6 3L Petrol

19.43.42

3.0

*

LR178362

Fuel Supply Line - Range Rover INGENIUM I6 3L Petrol - PHEV

19.43.42

3.2

*

LR178362

Fuel Supply Line - Range Rover Sport INGENIUM I6 3L Petrol - PHEV

19.43.42

3.2

*

LR178362

Cooling System Concentration Check

26.10.24

0.1

*

LR151660

DESCRIPTION

NOTE:
Normal Warranty procedures apply.

INSPECTION

WARNING:
Injury such as scalding could be caused by escaping steam or coolant. The vehicle
cooling system must be cool prior to completing this inspection.

CAUTIONS:
Engine coolant can damage the paint finished surfaces. If spilt, immediately
remove the fluid and clean the area with water.
Never remove the coolant expansion tank filler cap under any circumstances
while the engine is operating. Failure to follow this instruction may result in
damage to the engine.

1.

Open the hood and check engine coolant level.
If the level is at minimum or above and the low coolant level message is
displayed on the instrument cluster, the cause may be related to a concern
with the coolant level sensor.
Follow the TOPIx cloud workflow 'Powertrain - Warnings - Warning
Message - Coolant Low' and follow the test plan 'Coolant level low
message displayed on the instrument cluster' to test the coolant level
sensor and wiring, then continue to next step 2.
If the coolant level is below minimum continue to next step 3.

2.

NOTES:
Any related repairs must be claimed as a separate warranty claim.
If the coolant expansion tank is replaced as a result of this inspection it
will not be necessary to complete step 2 of the SERVICE
INSTRUCTION.

If the issue was related to a wiring or coolant level sensor concern, repair as
necessary following TOPIx and continue to step 1 of the service instruction.

3.

NOTES:
Any related repairs must be claimed as a separate warranty claim.
Replace any damaged or faulty components before completing this
bulletin.

Visually check the cooling system for signs of engine coolant leaks and distorted
hoses. Make sure all the cooling system components are correctly installed.
If there are any visual signs of engine coolant leaks do not continue with
this bulletin. Repair as necessary with reference to TOPIx.
If there are no visual signs of engine coolant leaks complete the
COOLING SYSTEM PRESSURE TEST section of this bulletin.

COOLING SYSTEM PRESSURE TEST

WARNING:
Injury such as scalding could be caused by escaping steam or coolant. The vehicle
cooling system must be cool prior to completing this procedure.

CAUTIONS:
Engine coolant can damage the paint finished surfaces. If spilt, immediately
remove the fluid and clean the area with water.
Never remove the coolant expansion tank filler cap under any circumstances
while the engine is operating. Failure to follow this instruction may result in
damage to the engine.
Mating faces must be are clean and free of foreign material.

NOTES:
This procedure contains some variation in the illustrations depending on the
vehicle specification, but the essential information is always correct.
This procedure contains illustrations showing certain components removed to
provide extra clarity.

1.

NOTE:
Be prepared to catch escaping coolant.



Disconnect and release the engine coolant vent pipe.

2.



Install the special tool as illustrated.

Special Tool(s): JLR-303-1720-01.

3.



Connect the engine coolant vent pipe.

4.

CAUTION:
Do not exceed 1.65 bar (24 psi - 165 kPa) when pressurizing the cooling
system.

NOTE:
If the pressure continues to drop after the initial tolerance, the cooling
system must be checked for leaks.



Connect the cooling system pressure tester to the cooling system pressure
tester adapter.
Slowly pressurize the cooling system until 1.65 bar (24 psi - 165 kPa) is
shown on the gauge.
No significant drop in pressure should be noted on the cooling pressure
tester gauge. If after 5 minutes the pressure significantly drops, the cooling
system must be inspected for leaks. A pressure drop of 0.07 bar (1psi 100 kPa) in the first minute is considered normal operation.

General Equipment: Cooling system pressure tester.

5.



Depressurize and remove the cooling system pressure tester.

6.

Disconnect the engine coolant vent pipe.

7.

Remove the special tool.

Special Tool(s): JLR-303-1720-01.

8.

NOTE:
Any related repairs must be claimed as a separate warranty claim.

Visually check the cooling system for signs of engine coolant leaks.
If there are any visual signs of engine coolant leaks do not continue with
this bulletin. Repair as necessary with reference to TOPIx.
If there are no visual signs of engine coolant leaks complete the SERVICE
INSTRUCTION section of this bulletin.

SERVICE INSTRUCTION:

INGENIUM I6 3.0L Petrol, INGENIUM I6 3.0L Petrol PHEV Vehicles Only:

1.

Remove the fuel supply line (see TOPIx Workshop Manual section 310-01: Fuel
Tank and Lines - Removal and Installation - Fuel Supply Line).

All Vehicles:
2.

WARNING:
DO NOT renew the coolant expansion tank if it was already renewed at
step 2 of the INSPECTION.

Renew the coolant expansion tank (see TOPIx Workshop Manual section 30303: Engine Cooling - Removal and Installation - Coolant Expansion Tank).
INGENIUM I6 3.0L Petrol, INGENIUM I6 3.0L Petrol PHEV Vehicles Only:
3.

Install the new fuel supply line (see TOPIx Workshop Manual section 310-01:
Fuel Tank and Lines - Removal and Installation - Fuel Supply Line).

All Vehicles:
4.

Check the coolant concentration (see TOPIx Workshop Manual section 303-03:
Engine Cooling - General Procedure - Cooling System Concentration Check).