Land Rover Discovery D350
The 3.0L Ingenium straight-six diesel with 48V mild-hybrid is more refined than the 2.0L diesel. Main issues: oil filter housing recall N908 (fire risk, 2021–2025), EGR coking and DPF on short trips. The 48V DC-DC converter is the designed-in weak link of the MHEV system.
D350 Discovery: seven seats with substance
The 257 kW diesel in the Discovery L462 turns the family hauler into a relaxed long-distance traveller. No rev stress, no diesel clatter — just quiet propulsion for seven people. The mild hybrid efficiency pays off on holiday runs.
Engine Weaknesses 6
Incorrect plastic specification for the Ingenium I6 oil filter housing. The housing can crack and spray engine oil under pressure onto hot components such as the turbocharger. Fire risk. Recall N908.
Symptoms: Visible oil leak, oil puddles after parking, oil warning light, in severe cases smoke or fire
The DT306 electronic turbocharger actuator develops faults from overheating and deposits. Repair is labour-intensive due to the engine layout.
Symptoms: Power loss, engine warning light, uneven acceleration, delayed turbo response
The DT306 common rail injectors can fail from fuel contamination and internal wear. On the inline-six diesel all 6 injectors are affected.
Symptoms: Rough idle, diesel knock, black smoke, misfires, engine warning light
The DT306 EGR system carbons up particularly with short-trip use. A clogged EGR cooler raises operating temperatures and promotes overheating.
Symptoms: Rough idle, power drop, black smoke under acceleration, engine warning light
The DT306 DPF blocks with predominantly urban driving. Forced regeneration cycles increase fuel consumption and can cause oil dilution.
Symptoms: DPF full warning, reduced engine power, strong fuel smell from exhaust
On the 48V mild hybrid system, the DC-DC converter from 48V to 12V fails. Since MHEV vehicles have no conventional alternator, the 12V battery drains — complete vehicle shutdown is possible.
Symptoms: Charging system fault warning, red battery symbol, dimming lights, infotainment shutdown
Vehicle Weaknesses 8
The Discovery 5 also suffers from the typical Land Rover air suspension weakness. Air springs become porous after 80,000–120,000 km. The compressor becomes overloaded and early system failures occur.
The InControl Touch Pro system of the Discovery 5 frequently freezes, responds with a delay or shows a black screen. Software updates help; hardware defects on the controller require replacement.
The seal around the tail light unit on the tailgate becomes porous. Water enters the boot area through the rear lights. The Gore-Tex membrane does not keep moisture out permanently.
The InControl system does not fully shut down when the vehicle is left unlocked. Battery is drained overnight. Typical weakness of all JLR models of this generation.
Rear brake discs corrode heavily between uses — typical on vehicles with little city or motorway driving. Corrosion reduces braking performance and causes vibration.
The windscreen seal becomes leaky and allows water to enter the driver or passenger footwell. Control units in the footwell can be damaged. Well-known issue in L462 forums.
The Discovery 5 has an aluminium body that is prone to galvanic corrosion where it contacts steel fasteners. Particularly visible at screw connections and brackets.
The ZF 8HP gearbox shows torque converter shudder or judder in isolated cases, particularly at low temperatures. A transmission fluid flush and software update resolves the issue in most cases.
Reports & Tests
105 owner complaints filed with NHTSA (2017–2026). Most reported: Electrical (38), Other (26), Powertrain (17).