Electrical & ignition
2 documented faults — symptoms, causes and workshop fixes.
TPMS warning lamp illuminated
Symptoms
TPMS warning message displayed in multifunction display. Trouble codes related to TPMS stored in fault memory.
Cause
Signal interference from alternator.
Repair
- Fit modified TPMS sensors.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| TPMS sensor | LR031713, or LR031712 | 5 |
Data: Motorwise Workshop. Bulletin 2.
Intermittent self-activation of alarm system siren
Symptoms
Audible warning sounds when locking vehicle. Bonnet open warning message displayed in instrument panel.
Cause
Bonnet switch faulty.
Repair
- Fit new bonnet switch. Bonnet switch integral to bonnet latch.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Bonnet switch | LR054331 | 1 |
Data: Motorwise Workshop. Bulletin 8.
Brakes
2 documented faults — symptoms, causes and workshop fixes.
Excessive heat build up in rear brakes
Overview
- Affects
- All models with electric parking brake (EPB): Discovery 3: VIN 5A000259→. Discovery 4: VIN AA513326→. Range Rover Sport: VIN 5A900106→.
- Remedy
- Software update
Symptoms
Electric parking brake (EPB) warning lamp illuminated. Squeal from rear brakes when driving. Squeal from rear brakes when electric parking brake (EPB) is operated. Trouble codes stored: C1A43, C1A53, C1A46.
Cause
Parking brake shoes binding.
Parking brake shoes seizing due to build up of debris.
EPB control module software fault.
Repair steps
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- Ensure parking brake shoes are correctly adjusted.
- If no fault(s) found: Re-program EPB control module with upgraded software.
Data: Motorwise Workshop. Bulletin 5.
Front brake judder
Front brake disc distortion. Fix: fit a modified part.
Overview
- Affects
- All models: Discovery 4: VIN AA513326-AA555717. Range Rover Sport: VIN AA215623-AA276763.
- Remedy
- Fit modified part
Repair steps
- Fit new front brake discs.
- Check front brake disc runout. If front brake disc runout is greater than 0.03 mm: Remove front brake discs. Check front hub runout. If front hub runout is greater than 0.014 mm: Replace front hubs. Fit front brake discs.
- Fit modified front brake pads.
Data: Motorwise Workshop. Bulletin 6.
Suspension & drivetrain
1 documented fault — symptoms, causes and workshop fixes.
Knocking noise from front suspension when driving over uneven surfaces
Overview
- Affects
- All models.
- Parts
- 1 part
Symptoms
Knocking noise from front suspension when braking at low speed.
Repair
- Replace front suspension lower arm rear bush on both sides.
- Check front wheel alignment and adjust if necessary.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Suspension lower arm rear bush | LR067494 | 2 |
Data: Motorwise Workshop. Bulletin 9.
Steering
4 documented faults — symptoms, causes and workshop fixes.
Squeaking noise from steering column when steering wheel turned
Insufficient lubrication of power steering rack pinion oil seal. Fix: fit a new part.
Overview
- Affects
- All models, VIN 000259-485435.
- Remedy
- Fit new part
Repair steps
- Remove power steering rack.
- Fit new power steering rack pinion oil seal. Use special tool: 308-518.
- Refit power steering rack.
Parts
| Part | Part number | Qty |
|---|---|---|
| Power steering rack pinion oil seal kit | LR010545 | 1 |
Data: Motorwise Workshop. Bulletin 1.
Non start
Symptoms
Message centre displays 'steering column locked'. Trouble codes stored: B1026-12, B100D-87.
Cause
Instrument panel faulty.
Repair
- Fit modified instrument panel.
Data: Motorwise Workshop. Bulletin 4.
Steering wheel vibration when driving
Overview
- Affects
- All models, VIN AA513326→.
- Remedy
- Fit modified part
Cause
Flat spot on tyre.
Wheels out of balance.
Front suspension lower arm bush faulty.
Power steering rack faulty.
Defective steering wheel.
Repair
- Check tyre condition, tyre pressure and wheel balance.
- If fault still present: Fit new front suspension lower arm bushes. Fit new power steering rack. Fit modified steering wheel.
Data: Motorwise Workshop. Bulletin 7.
Steering heavy
Symptoms
Noise from steering column when driving over uneven surfaces or when manoeuvring or parking.
Cause
Water ingress into steering column lower universal joint causing corrosion.
Repair
- Fit new steering column lower shaft.
Parts2 parts
| Part | Part number | Qty |
|---|---|---|
| Steering column lower shaft - RHD | LR071146 | 1 |
| Steering column lower shaft - LHD | LR071147 | 1 |
Data: Motorwise Workshop. Bulletin 10.
Air conditioning & heating
1 documented fault — symptoms, causes and workshop fixes.
AC/heater outlet air temperature does not correspond to setting
Poor sealing of in-car temperature sensor air intake ducting allowing air to escape.
Overview
- Affects
- All models.
Repair steps
- Remove in-car temperature sensor air intake ducting assembly.
- Fit foam pad to in-car temperature sensor air intake ducting. Ensure foam pad covers edges of air intake ducting.
- Refit in-car temperature sensor air intake ducting assembly.
Parts
| Part | Part number | Qty |
|---|---|---|
| Foam pad | ETD 500550 | 1 |
Data: Motorwise Workshop. Bulletin 12.
Body & trim
1 documented fault — symptoms, causes and workshop fixes.
Clock cannot be set to correct time
Overview
- Affects
- All models with analogue clock: Discovery 4: VIN 510178-525032. Range Rover Sport: VIN 212145-230615.
- Remedy
- Software update
Cause
Multifunction control module software 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 multifunction control module with upgraded software.
Data: Motorwise Workshop. Bulletin 3.
Other
1 documented fault — symptoms, causes and workshop fixes.
Cracking noise from left hand speakers in DAB mode
Overview
- Affects
- All models with digital audio broadcast (DAB) audio unit.
- Remedy
- Software update
Cause
Digital audio broadcast (DAB) control module software 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 digital audio broadcast (DAB) 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 11.
Glossary
Technical terms used in this guide.
- VIN
- Vehicle identification number — 17 characters, found at the base of the windscreen and on the V5C logbook
- Trouble Codes
- Standardised fault codes stored by the engine control module, read with a diagnostic tool
- DAB
- Digital audio broadcast — digital radio
- EPB
- Electric parking brake — an electronic handbrake, operated by a switch rather than a lever
- TPMS
- Tyre pressure monitoring system — warns if a tyre is under-inflated
- Control Module
- A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
- Disc Runout
- How much a brake disc wobbles; too much causes vibration or squeal
- Fault Memory
- The list of stored trouble codes in a control module
- In-Car Temperature
- The cabin-temperature sensor used by the climate control
- Instrument Panel
- The dashboard display that shows warning lights and messages
- Message Centre
- The information display in the instrument panel that shows warning messages
- Multifunction Control Module
- The control module that runs shared electrical functions (lights, wipers, locking, and so on)
- Pinion Oil Seal
- The seal on a differential pinion shaft — a common source of oil leaks
- Re-Program
- Update the software on a control module using the manufacturer's diagnostic tool
- Steering Column Locked
- The electronic steering lock has engaged — the column will not turn until the key is recognised
- Alternator
- The unit that charges the battery while the engine is running
- Bonnet Switch
- The switch that tells the alarm whether the bonnet is open
- Bush
- A rubber mounting that lets a suspension or body joint move without metal-to-metal contact
- Bushes
- Rubber mountings that let a suspension or body joint move without metal-to-metal contact
- Lower Arm
- A suspension link that locates the wheel at the bottom of the hub
- Universal Joint
- A flexible coupling in a driveshaft that lets it bend as the suspension moves
Frequently asked questions
What are the common faults with the Land Rover Discovery 4 Discovery 4.0?
This guide contains 12 workshop bulletins for the Land Rover Discovery 4 Discovery 4.0. Of these, four concern the steering and two the electrical and ignition. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Land Rover Discovery 4 Discovery 4.0 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 4 Discovery 4.0 faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.