Service bulletin LTB01003NAS3

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10149084
Published by NHTSA	2018-11-26
Manufacturer's number	LTB01003NAS3
Manufacturer's date	2018-09-11
NHTSA component	ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY

NHTSA's summary

Coolant may be evident leaking from one or both of the auxiliary radiators behind the front bumper.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Cooling system, Radiator

Vehicles listed
LAND ROVER RANGE ROVER SPORT	2014, 2015, 2016, 2017

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
SSM73678	2018-05-29. Service bulletin. Issue: Unexpected noise from Head-Up Display (HUD)
LTB01003NAS2	2017-08-25. Service bulletin. Coolant may be leaking from one or both of the auxiliary radiators
LTB00671NAS6	2017-06-13. Service bulletin. SITUATION: THE ENGINE MALFUNCTION INDICATOR LAMP (MIL) MAY BE ILLUMINATED. UPON DIAGNOSIS, THE TECHNICIAN MAY FIND ONE OR MORE DIAGNOSTIC TROUBLE CODE (DTC), LISTED IN THE TABLE BELOW AND RELEVANT TO THE HEATED OXYGEN SENSORS (HO2S), MAY BE STORED IN THE ENGINE CONTROL MODULE (ECM).
LTB00754NAS1	2017-06-07. Service bulletin. "SITUATION: THE ENGINE MALFUNCTION INDICATOR LAMP (MIL) MAY BE ILLUMINATED AND DIAGNOSTIC TROUBLE CODE (DTC) P007B-00 STORED IN THE ENGINE CONTROL MODULE (ECM) WITH NO OTHER VEHICLE SYMPTOMS PRESENT. CAUSE: THIS MAY BE CAUSED BY A CHARGE AIR COOLANT PUMP COMPATIBILITY ISSUE."
SSM72008	2017-06-07. Service bulletin. "ISSUED MARCH 2015. ISSUE: LOW COOLANT MESSAGE DISPLAYED. A COOLANT LEAK IS FOUND FROM THE SEAM ON COOLANT PIPE (LR018275). SEE THE ATTACHED FILE FOR AN EXAMPLE OF THE LEAK LOCATION. CAUSE: A PROCESS ISSUE AT COMPONENT SUPPLIER."
Q496NAS1	2017-06-07. Service bulletin. "SITUATION: AN ISSUE HAS BEEN IDENTIFIED ON A LIMITED NUMBER OF 2015 MODEL YEAR RANGE ROVER SPORT (L494) AND RANGE ROVER (L405) VEHICLES WHERE A 'LOW COOLANT' WARNING IS ILLUMINATED ON THE INSTRUMENT CLUSTER DUE TO COOLANT LEAKING THROUGH THE LOWER PART OF THE COOLANT EXPANSION TANK. ACTION: RETAILERS ARE REQUIRED TO HOLD ONLY AFFECTED NEW VEHICLES THAT ARE WITHIN YOUR CONTROL AND REFRAIN FROM RELEASING THE VEHICLES FOR NEW VEHICLE SALE PENDING COMPLETION OF THE SERVICE INSTRUCTION DETAILED IN THIS TECHNICAL BULLETIN."
LTB00352NAS6	2017-06-06. Service bulletin. "SITUATION: THE FLUID LEVEL IN THE ENGINE COOLANT SYSTEM EXPANSION TANK MAY FALL BELOW THE MINIMUM LEVEL OVER A PERIOD OF TIME OR A ‘LOW COOLANT LEVEL’ MESSAGE IS DISPLAYED IN THE MESSAGE CENTER. UPON INSPECTION, A LEAK MAY BE FOUND TO BE FROM THE FRONT OF THE ENGINE-DRIVEN COOLANT PUMP, TOGETHER WITH EXCESSIVE WEAR OF THE COOLANT PUMP BEARING."
SSM72008	2017-06-02. Service bulletin. "ISSUE: LOW COOLANT MESSAGE DISPLAYED. A COOLANT LEAK IS FOUND FROM THE SEAM ON COOLANT PIPE (LR018275). SEE THE ATTACHED FILE FOR AN EXAMPLE OF THE LEAK LOCATION. CAUSE: A PROCESS ISSUE AT COMPONENT SUPPLIER."
LTB00352NAS5	2017-05-31. Service bulletin. "SITUATION: THE FLUID LEVEL IN THE ENGINE COOLANT SYSTEM EXPANSION TANK MAY FALL BELOW THE MINIMUM LEVEL OVER A PERIOD OF TIME OR A ‘LOW COOLANT LEVEL’ MESSAGE IS DISPLAYED IN THE MESSAGE CENTER. UPON INSPECTION, A LEAK MAY BE FOUND TO BE FROM THE FRONT OF THE ENGINE-DRIVEN COOLANT PUMP, TOGETHER WITH EXCESSIVE WEAR OF THE COOLANT PUMP BEARING."
Q366 UPS0514-2BN	2017-05-31. Service bulletin. "SITUATION: AN ISSUE HAS BEEN IDENTIFIED WITH CERTAIN 2014 MODEL YEAR LR4, RANGE ROVER SPORT, AND RANGE ROVER VEHICLES WHERE THE CORRECT SPECIFICATION ENGINE OIL (5W-20) HAS BEEN WRONGLY MIXED WITH COLD-CLIMATE ENGINE OIL (0W-30). THIS INCORRECT MIXING MAY RESULT IN EMULSIFICATION OF THE ENGINE OIL, POTENTIALLY LEADING TO PERFORMANCE ISSUES WITH THE ENGINE LUBRICATION SYSTEMS. ACTION: RETAILERS ARE REQUIRED TO HOLD ALL AFFECTED VEHICLES WITHIN THE LISTED VIN RANGE THAT ARE IN THEIR CONTROL AND REFRAIN FROM RELEASING THE VEHICLES FOR NEW OR USED VEHICLE SALE PENDING COMPLETION OF THE REWORK ACTION DETAILED IN THIS TECHNICAL BULLETIN."