Engine & fuel system
1 documented fault — symptoms, causes and workshop fixes.
Rattling noise from front underside of vehicle when driving
Sound insulation material on engine undertray insecure.
Overview
- Affects
- All models with Diesel engines, 2019→.
Repair steps
- Remove engine undertray.
- Remove and discard the 6 retaining clips securing sound insulation panel to engine undertray.
- Secure sound insulation panel to engine undertray with 6 retaining nuts.
- Refit engine undertray.
Parts
| Part | Part number | Qty |
|---|---|---|
| Retaining nut | LR003643 | 6 |
Data: Motorwise Workshop. Bulletin 2.
Air conditioning & heating
1 documented fault — symptoms, causes and workshop fixes.
Abnormal noise from fascia for approximately 7seconds when automatic defrost function selected
Overview
- Affects
- All models.
- Remedy
- Software update
Cause
Incorrect AC/heater control module characteristics due to software mapping fault.
Repair
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Re-program AC/heater control module with upgraded software. Note: To carry out an effective repair a software upgrade will be required - refer to manufacturer.
Data: Motorwise Workshop. Bulletin 4.
Body & trim
2 documented faults — symptoms, causes and workshop fixes.
Tailgate difficult to open
Tailgate misaligned.
Overview
- Affects
- All models.
Symptoms
Damage to tailgate aperture trim panel due to contact with tailgate. Damage to tailgate paintwork due to contact with tailgate trim panel.
Repair steps
- Check and adjust alignment of tailgate.
- Check tailgate aperture trim panels for damage and replace as necessary.
- Repair tailgate paintwork damage if necessary.
Parts
| Part | Part number | Qty |
|---|---|---|
| Tailgate aperture trim panel (LH) | LR082949 | 1 |
| Tailgate aperture trim panel (RH) | LR082948 | 1 |
Data: Motorwise Workshop. Bulletin 1.
Unable to release bonnet
Bonnet release cable stretched. Fix: fit a new part.
Overview
- Affects
- All models.
- Remedy
- Fit new part
Repair steps
- Fit new bonnet release cable.
- Check bonnet release lever travel.
- Bonnet release lever travel should not exceed 120 mm.
Parts
| Part | Part number | Qty |
|---|---|---|
| Bonnet release cable | LR121817 | 1 |
Data: Motorwise Workshop. Bulletin 3.
Glossary
Technical terms used in this guide.
- AC/Heater
- The heating and air-conditioning system
- Control Module
- A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
- Re-Program
- Update the software on a control module using the manufacturer's diagnostic tool
- Undertray
- The plastic shield under the engine bay
Frequently asked questions
What are the common faults with the Land Rover Discovery 3.0 D300 MHEV?
This guide contains four workshop bulletins for the Land Rover Discovery 3.0 D300 MHEV. Of these, two concern the body and trim and one the engine and fuel system. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Land Rover Discovery 3.0 D300 MHEV have these faults?
No. These are patterns documented across the model by workshops, not predictions for an individual vehicle. Where a fault applies only to certain vehicles or VIN ranges, that is listed with the fault.
Can I check for Land Rover Discovery 3.0 D300 MHEV faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.