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Top issues
14 known problems · 6 high
high
Cylinder liner slip / block failure
2 of 3 engines
high
Oil contamination of the engine wiring loom / ECU
2.5L Td5 turbo-diesel
high
Head gasket failure from plastic head dowels (pre-2002)
2.5L Td5 turbo-diesel
Recalls
1 on recordPRA 2002/5304
2002-04-12
Defect: The wheel speed sensor for the ABS can be deceived by metallic debris in the area, transmitting an incorrect wheel speed signal.
Hazard: Incorrect ABS operation could affect braking performance.
Remedy: Contact your Land Rover dealer for inspection and repair (campaign D263).
Affected: Discovery Series II (V8 and Td5), built 1998-2001
Official notice: www.productsafety.gov.au · details checked 2026-09-30
Check a specific car by VIN at vehiclerecalls.gov.au.
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Before and after
Before: Discovery 1 (1989-1998)
Price (AUD)
$4k-$18k
Body styles
5-door wagon (5 or 7 seat)
Drivetrain
Full-time 4WD (lockable centre diff, dual-range)
Origin
UK
Built in
United Kingdom (Solihull)
Overview
Sold as S, GS, SE, ES and HSE, the Discovery 2 (Series II) carried over Land Rover's classic full-time dual-range 4WD with live axles, coil springs front, and a self-levelling air spring or coil rear. It is genuinely capable off-road and roomy with the optional third row, but it is the vehicle on this list to buy with the most care: the engineering is charming and the electronics fragile. Australian buyers got the five-cylinder 2.5L Td5 turbo-diesel as the mainstay (the one most people want), the 4.0L Bosch-injected 'Thor' V8 petrol, and after the 2003 facelift a 4.6L V8 petrol. The Td5's reputation rests on a handful of well-known faults - the oil-in-loom (oil-in-ECU) wiring issue, early plastic head dowels causing head gasket failure, and the fuel pressure regulator (FPR) leak - all fixable and well documented. The petrol V8s share the Rover aluminium block's dreaded cylinder liner slip. Add ACE active anti-roll, ABS/SLABS modules, and rear air suspension that all age badly, and you have a 4WD that rewards a knowledgeable owner with parts on the shelf and punishes anyone expecting Toyota set-and-forget ownership. Buy on history and condition, not on price.
Engines & variants
2.5L Td5 turbo-diesel
Engine
2.5L SOHC electronically-controlled turbo-diesel inline-5 with EUI (electronic unit injectors)
Engine code
Config
I5 turbo
Displacement
2495cc
Power
101kW @ 4200rpm
Torque
300Nm @ 1950rpm
Drivetrain
Full-time 4WD (lockable centre diff, dual-range)
0–100
~14.5s
Economy
10-12 L/100km combined
Tow (braked)
3500kg
Tow (unbraked)
750kg
Transmission
5MT (R380), 4AT (ZF 4HP22)
Timing chain / belt / gear
Chain-driven
Pros
- Torquey, characterful five-cylinder diesel - good low-down pull off-road
- Far more economical than the thirsty V8 petrols
- Well-documented faults with cheap, known DIY fixes
- Strong UK/Aus aftermarket and specialist support
- Most sought-after and best-resale Discovery 2 engine
Cons
- Will not tolerate overheating - cooling system must be perfect
- Oil-in-loom and head dowel issues are near-universal if unaddressed
- Fuel pressure regulator leak is a common no-start cause
- Turbo runaway risk from cracked fuel rail / injector seals
- Electronics (ECU, sensors) are fragile and dealer-priced new
Known problems
high
Oil contamination of the engine wiring loom / ECU
Engine oil wicks along the injector wiring by capillary action and tracks down the loom into the ECU connectors, corroding pins and causing misfires, erratic running and no-starts. Almost every Td5 needs this addressed.
Fix: Fit a modified/oil-sealed loom or repair the loom and reseal the ECU connector; clean the ECU pins. A well-known, affordable specialist job.
high
Head gasket failure from plastic head dowels (pre-2002)
Early Td5s used plastic locating dowels between block and head; they allow head movement and head gasket failure, which the Td5 does not survive well if it then overheats.
Fix: Replace head gasket using steel dowels; ensure cooling system (radiator, viscous fan, thermostat) is fresh. Confirm steel dowels fitted before buying.
medium
Fuel pressure regulator (FPR) leak / no-start
The FPR diaphragm/seals on the fuel pump-in-tank or filter housing deteriorate, causing fuel leaks, hard starting and loss of prime.
Fix: Replace the FPR with an updated O-ring kit - cheap and a common DIY fix.
high
Engine runaway from cracked fuel rail / injector washers
Failed injector copper washers or a cracked fuel rail in the cylinder head can let fuel pool and the engine run away uncontrollably even with the ignition off - potentially destructive.
Fix: Replace injector washers/seals as a set; inspect and replace the fuel rail if cracked. Address any blue-smoke or fuelling symptoms immediately.
4.0L V8 petrol (Thor)
Engine
4.0L OHV Rover-derived aluminium V8, Bosch Motronic 'Thor' fuel injection
Engine code
40D
Config
V8 NA
Displacement
3950cc
Power
136kW @ 4750rpm
Torque
340Nm @ 2600rpm
Drivetrain
Full-time 4WD (lockable centre diff, dual-range)
0–100
~11.5s
Economy
16-20 L/100km real world
Tow (braked)
3500kg
Tow (unbraked)
750kg
Transmission
5MT (R380), 4AT (ZF 4HP22)
Timing chain / belt / gear
Chain-driven
Pros
- Smooth, torquey V8 with a pleasant exhaust note
- Much cheaper to buy than a good Td5
- Simpler fuelling than the diesel - no oil-in-loom drama
- Responds to LPG conversion to tame fuel cost
Cons
- Cylinder liner slip is the engine's signature killer
- Very thirsty, poor touring range on petrol alone
- Weak resale next to the Td5 diesel
- Aluminium block intolerant of any cooling neglect
Known problems
high
Cylinder liner slip / block failure
The aluminium block's steel cylinder liners can drop/slip as the block expands, breaking the head gasket seal, mixing coolant and combustion and overheating - often terminal for the block.
Fix: Top-hat liner re-sleeve or a rebuilt/replacement block; meticulous cooling-system maintenance to prevent recurrence. Coolant problems on a V8 are a major red flag pre-purchase.
high
Head gasket failure / overheating
Overheating or liner movement causes head gasket failure; the alloy V8 is unforgiving of any cooling-system neglect.
Fix: Head gasket replacement with cooling-system overhaul (radiator, viscous fan, thermostat, water pump).
low
Fuel thirst
16-20 L/100km is normal and worse when towing or loaded; touring range is poor.
Fix: Accept the fuel cost or fit a quality LPG conversion.
4.6L V8 petrol (Thor)
Engine
4.6L OHV Rover-derived aluminium V8, Bosch Motronic injection (fitted to 2003 facelift)
Engine code
46D
Config
V8 NA
Displacement
4554cc
Power
162kW @ 4750rpm
Torque
400Nm @ 2600rpm
Drivetrain
Full-time 4WD (lockable centre diff, dual-range)
0–100
~10.5s
Economy
17-22 L/100km real world
Tow (braked)
3500kg
Tow (unbraked)
750kg
Transmission
4AT (ZF 4HP22)
Timing chain / belt / gear
Chain-driven
Pros
- Stronger and torquier than the 4.0 - the best-performing Disco 2
- Smooth, quiet V8 well-suited to the facelift cars
- Cheap to buy because petrol scares buyers off
- Takes LPG well
Cons
- Shares the same aluminium-block liner-slip risk as the 4.0
- Even thirstier than the 4.0L
- Only on late 2003-2004 facelift cars - low volume in Australia
- Auto-only; weak resale versus the Td5
Known problems
high
Cylinder liner slip / block failure
Same alloy-block weakness as the 4.0 - steel liners can slip, breaking the head gasket seal, contaminating coolant and overheating; frequently fatal to the block.
Fix: Top-hat re-sleeve or rebuilt/replacement block; keep cooling system immaculate. Treat any coolant loss or overheating history as a major warning.
high
Head gasket / cooling system failure
Overheating and liner movement cause head gasket failure on the alloy V8.
Fix: Head gasket replacement plus full cooling overhaul (radiator, viscous fan, thermostat, water pump).
low
Fuel thirst
17-22 L/100km, worse when towing; poor touring range on petrol.
Fix: LPG conversion or accept the fuel bill; long-range tank for touring.