The 2022 Discovery with the 3.0L supercharged V6 is relatively new but shares the AJ126 engine architecture with known oil consumption and internal wear issues that plague earlier generations. Electrical gremlins and transmission cooling concerns also appear earlier than expected for a modern luxury SUV.
Catastrophic Engine Oil Consumption & Internal Wear
Occasional · high severityTypical onset: 30,000-70,000 mi
Symptoms: Excessive oil consumption (1+ quart per 1,000 miles), Blue smoke from exhaust on cold starts or acceleration, Check engine light with misfire codes, Knocking or ticking noise from engine block, Low oil pressure warnings
Fix: The AJ126 supercharged engine suffers from piston ring flutter and bore wear. Diagnosis requires leak-down and compression tests. Fix ranges from piston ring replacement (25-30 hours) to complete short block replacement (35-45 hours) depending on cylinder wall condition. Often covered under extended warranty if caught early.
Estimated cost: $8,000-18,000
Transmission Oil Cooler Failure
Common · medium severityTypical onset: 40,000-80,000 mi
Symptoms: Transmission fluid leaking from cooler lines or radiator area, Transmission overheating warnings on display, Harsh or delayed shifting when hot, Pink or milky transmission fluid (coolant contamination)
Fix: The ZF 8HP transmission cooler develops leaks at crimped fittings or internal tube failures. Requires cooler replacement, often with updated part number. Labor is 4-6 hours including fluid flush. Critical to catch before coolant cross-contaminates and destroys transmission.
Estimated cost: $1,200-2,200
DC/DC Converter Failure (Hybrid System)
Occasional · high severitySymptoms: Vehicle won't start despite new 12V battery, Electrical system fault messages, Intermittent loss of power accessories, Battery drain when parked, Reduced battery voltage warnings
Fix: The DC/DC converter charges the 12V battery from the 48V mild-hybrid system. When it fails, the 12V system dies even with healthy batteries. Subject to recall campaign, but failures still occur. Replacement requires 3-4 hours labor and software calibration. Must use genuine LR part.
Estimated cost: $2,500-3,800
Transmission Mounts Premature Failure
Common · low severityTypical onset: 35,000-60,000 mi
Symptoms: Clunking when shifting from Park to Drive/Reverse, Excessive vibration at idle in gear, Shudder during acceleration from stop, Visible sagging or torn rubber on mount inspection
Fix: Hydraulic transmission mounts fail prematurely, especially on vehicles used for towing. Requires replacement of both upper and lower mounts. Labor is 2-3 hours. Use OEM mounts as aftermarket versions fail even faster.
Estimated cost: $800-1,400
Fuel System Contamination from Filter Degradation
Occasional · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Hard starting or extended crank time, Rough idle and hesitation under load, Fuel pressure fault codes, Check engine light with lean/rich mixture codes, Loss of power at highway speeds
Fix: In-tank fuel filter media degrades and contaminates fuel system with debris, clogging injectors and high-pressure pump. Requires fuel tank drop (5-6 hours), filter replacement, injector cleaning or replacement, and fuel system flush. Preventive filter replacement every 60k miles recommended.
Estimated cost: $1,500-3,500
Infotainment System Freezing and Backup Camera Failure
Common · low severitySymptoms: Touchscreen becomes unresponsive or freezes, Backup camera shows black screen or 'camera unavailable', Navigation system crashes randomly, Bluetooth connectivity drops repeatedly, System requires multiple hard resets
Fix: InControl Touch Pro Duo system has software corruption and camera module failures. Most issues require software reflash (1.5 hours) and module updates. Camera failures need replacement unit (2-3 hours). Many issues temporarily fixed by pulling fuse 44 for battery reset, but failures recur.
Estimated cost: $400-1,800
Hard pass unless under comprehensive warranty — the engine reliability issues are Russian roulette, and repair costs will financially total a used example within 100k miles.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.