ElectricalHigh
Software and module faults across the vehicle
- Typically appears
- 30,000+ miles
- What to inspect
- Run a full diagnostic scan and confirm updates
2020–2025 Land Rover Defender · common problems & known faults
The modern Defender is electronics heavy, so a full diagnostic scan is essential.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed August 2026
Quick answer
The most commonly reported faults on the 2020–2025 Land Rover Defender are Software and module faults across the vehicle, Air suspension leaks and compressor faults and Coolant loss and sweet smell from the engine bay due to water pump or EGR cooler failure on Ingenium engines. 3 of the documented issues are rated high severity · inspect these first. Full inspection points, onset mileage and what to check are listed below.
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Build the inspection planReliability snapshot
Based on the documented faults on this page for the Land Rover Defender.
4.3/ 10
- Critical
- 0
- High
- 3
- Medium
- 4
- Low
- 1
Guidance only · reflects reported patterns, not a specific car's condition.
Known faults to check
SuspensionHigh
Air suspension leaks and compressor faults
- Typically appears
- 50,000+ miles
- What to inspect
- Cycle ride heights and check overnight sag
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Build the inspection planBodyMedium
Leaks around the roof and rear door seals
- Typically appears
- Age-related
- What to inspect
- Check the boot and headlining for damp
BrakesMedium
Heavy pad and disc wear
- Typically appears
- 30,000+ miles
- What to inspect
- Measure pad thickness and check disc condition
Engine / CoolingHigh
Coolant loss and sweet smell from the engine bay due to water pump or EGR cooler failure on Ingenium engines.
- Typically appears
- 30,000-50,000 miles
- What to inspect
- Shine a torch down the front of the engine block beneath the water pump for pink crusting, and check the expansion tank level is above the MIN mark.
Exhaust / EmissionsMedium
DPF blockage and engine oil dilution causing premature service warnings and potential engine wear.
- Typically appears
- 15,000-25,000 miles
- What to inspect
- Scroll through the dashboard menu to check the miles until the next service. A drastically reduced interval or an oil level reading above maximum indicates diesel dilution.
Exterior TrimLow
Excessive wind noise or flapping sounds at motorway speeds caused by loose A-pillar finishers.
- Typically appears
- 10,000-30,000 miles
- What to inspect
- Firmly press and wiggle the exterior plastic A-pillar trims. If they flex excessively or the retaining clips click, they require replacement with upgraded JLR clips.
Engine / MHEV SystemMedium
Squealing or chirping noise from the auxiliary belt area due to BISG (Belt Integrated Starter Generator) tensioner wear.
- Typically appears
- 20,000-40,000 miles
- What to inspect
- Start the engine from cold with the bonnet open. Listen closely to the front of the engine for a high-pitched chirp or squeal from the drive belt.
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Build my inspection planFrequently asked questions
Are they reliable now?
Better than the old model, but electronics still dominate faults.
Essential check?
A dealer level diagnostic scan with software version confirmed.
Do they hold value?
Yes, demand is strong for clean examples.
Which engine is best for towing?
The D300 inline-six diesel is the optimal choice for heavy towing. It produces 650Nm of torque low down in the rev range, making light work of the 3,500kg maximum towing capacity. The P400 petrol is capable but significantly less fuel-efficient under load, whilst the four-cylinder diesels can feel strained.
What is the difference between the 90, 110, and 130 models?
The numbers denote the wheelbase and body length. The 90 is a three-door short-wheelbase model seating up to six. The 110 is the standard five-door long-wheelbase variant seating up to seven. The 130 shares the 110's wheelbase but features an extended rear overhang to accommodate eight passengers and larger luggage capacity.
Are the commercial Hard Top variants subject to different speed limits?
Yes. Because the Defender Hard Top is classified as a light commercial vehicle (N1 category), it is legally restricted to lower speed limits on certain UK roads. This means 50mph on single carriageways and 60mph on dual carriageways, though it remains permitted to travel at 70mph on motorways.
Sources & further reading
Faults are compiled from documented recalls, technical bulletins, owner reports and mechanic sources, then reviewed for accuracy. This is guidance only · not a substitute for a professional inspection.
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