The 2019 Range Rover Sport with the 3.0L supercharged V6 is a capable luxury SUV plagued by catastrophic engine failures and expensive electrical gremlins that can sideline the vehicle unexpectedly, making it a high-risk used purchase without comprehensive warranty coverage.
Catastrophic Engine Failure - Piston Ring / Cylinder Scoring
Occasional · high severityTypical onset: 40,000-80,000 mi
Symptoms: Excessive oil consumption (quart per 500-1000 miles), Blue smoke from exhaust on startup or acceleration, Loss of power and misfires, Metallic knocking noise from engine, Check engine light with cylinder misfire codes
Fix: Complete engine rebuild or replacement required. Pistons, rings, cylinder honing or boring, often includes crankshaft work and bearings. 40-60 labor hours for complete rebuild, 25-35 hours for short block replacement. This is the same AJ126 V6 supercharged engine known for ring land failures.
Estimated cost: $12,000-22,000
Transmission Oil Cooler Failure
Common · high severityTypical onset: 50,000-90,000 mi
Symptoms: Transmission fluid mixing with coolant (strawberry milkshake appearance in reservoir), Transmission slipping or erratic shifting, Overheating transmission, Coolant loss with no external leaks, Transmission failure if not caught early
Fix: Replace transmission oil cooler, flush cooling system and transmission completely, replace transmission fluid and filter. If contamination occurred, transmission may need rebuild. 6-8 hours labor for cooler replacement alone, add 15-25 hours if transmission damaged.
Estimated cost: $2,500-4,500 (cooler only), $8,000-14,000 (with transmission rebuild)
DC/DC Converter Failure (Hybrid System Component)
Occasional · high severitySymptoms: No start condition, Multiple electrical system warnings, Complete loss of 12V accessories, Vehicle stuck in park, Dash lighting completely dead or erratic
Fix: Replace DC/DC converter module which steps down high voltage to charge 12V battery. Often requires software updates and extensive diagnostics. Subject to recall but failures still occur. 3-5 hours labor including diagnostics and reprogramming.
Estimated cost: $2,800-4,200
Backup Camera Failure / Water Intrusion
Common · low severitySymptoms: Intermittent or no backup camera display, Distorted camera image, Camera guidelines not displaying properly, Rear parking sensors malfunctioning simultaneously
Fix: Replace tailgate camera module, check and seal wiring harness connections. Water intrusion through tailgate badge area is common. Subject to multiple recalls but issues persist. 1.5-2.5 hours labor.
Estimated cost: $800-1,400
Transmission Mount Failure
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Excessive vibration during acceleration, Clunking when shifting between drive and reverse, Visible engine/trans movement in bay during throttle application, Harsh shifts or delay in engagement
Fix: Replace transmission mounts (typically upper mount fails first). Requires supporting powertrain and removing crossmember. 3-4 hours labor for upper mount, add 2 hours for lower mounts if needed.
Estimated cost: $900-1,600
Fuel System / Fuel Filter Contamination Issues
Occasional · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Hard starting or extended cranking, Loss of power under load, Rough idle and hesitation, Fuel system pressure codes, Limp mode activation
Fix: Replace fuel filter (often neglected in service schedules), check high-pressure fuel pump and injectors for contamination. Filter is integrated into fuel pump module requiring tank drop. 4-6 hours labor for pump module replacement if needed.
Estimated cost: $1,200-2,400
Supercharger Coupler / Snout Bearing Failure
Occasional · high severityTypical onset: 80,000-120,000 mi
Symptoms: Whining or grinding noise from front of engine, Loss of boost pressure, Metallic debris in supercharger oil, Check engine light with boost pressure codes, Sudden loss of power
Fix: Rebuild or replace supercharger unit. Coupler and snout bearings wear causing catastrophic failure if not addressed. Requires removal of supercharger, inspection of internals. 12-16 hours labor for rebuild, includes new oil and seals.
Estimated cost: $4,500-7,500
Avoid unless you have a comprehensive warranty or $15,000-20,000 set aside for inevitable engine failure - the performance and luxury don't justify the catastrophic reliability issues.
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.