The 2017 Range Rover Sport with the 3.0L supercharged V6 is a capable luxury SUV plagued by catastrophic engine failures and cooling system weaknesses that can bankrupt unsuspecting owners. These aren't just high-mileage wear items—many engines fail prematurely due to fundamental design flaws.
Catastrophic Engine Failure (Cylinder Scoring/Bearing Failure)
Common · high severityTypical onset: 40,000-80,000 mi
Symptoms: Metallic knocking or ticking from engine bay, Sudden loss of power under load, Check engine light with misfire codes, Metal shavings in oil during changes, Oil consumption exceeding 1 quart per 1,000 miles
Fix: Complete engine rebuild or replacement required. Most failures trace to cylinder liner issues causing scoring, or bearing failures from oiling problems. Expect 30-40 labor hours for used engine swap, 50-70 hours for complete rebuild. Many shops won't touch rebuilds—replacement is safer.
Estimated cost: $12,000-22,000
Transmission Oil Cooler Failure and Cooler Line Leaks
Common · high severityTypical onset: 50,000-90,000 mi
Symptoms: Transmission fluid leaking from front of vehicle, Pink fluid puddles under engine bay, Transmission overheating warnings, Harsh shifting or slipping when hot, Milky transmission fluid (coolant cross-contamination)
Fix: Cooler itself cracks or cooler lines corrode at connections. When cooler fails internally, coolant mixes with ATF—requiring full transmission flush or replacement. External leaks need cooler and lines replaced. 6-10 hours labor depending on contamination extent.
Estimated cost: $2,200-5,500
Supercharger Coupler Failure and Bearing Noise
Occasional · high severityTypical onset: 60,000-100,000 mi
Symptoms: High-pitched whining from front of engine that increases with RPM, Sudden loss of boost/power, Rubber dust around supercharger pulley, Check engine light with boost pressure codes, Burning rubber smell
Fix: Rubber coupler between supercharger and drive pulley deteriorates and disintegrates. Sometimes bearings go first. Requires supercharger removal and rebuild or coupler replacement. 8-12 hours labor. Many owners upgrade to billet coupler during repair.
Estimated cost: $2,800-4,500
Timing Chain Stretch and Guide Wear
Occasional · high severityTypical onset: 70,000-120,000 mi
Symptoms: Rattling on cold start that quiets after 5-10 seconds, Check engine light with cam/crank correlation codes, Rough idle or hesitation, Timing chain noise from front of engine
Fix: Chains stretch and guides wear, causing timing slop. Can lead to valve-to-piston contact if catastrophic. Requires front engine teardown: chains, guides, tensioners, VVT solenoids. 16-22 hours labor. Do water pump and thermostat while you're in there.
Estimated cost: $4,500-7,000
Transmission Mount Failure
Common · medium severityTypical onset: 40,000-80,000 mi
Symptoms: Clunking when shifting from Park to Drive or Reverse, Vibration through cabin at idle in gear, Excessive movement felt during acceleration, Visual tears or separation in rubber mount
Fix: Hydraulic transmission mount tears or collapses, allowing excessive driveline movement. Relatively straightforward replacement but requires supporting transmission. 2-3 hours labor. Replace all motor mounts if budget allows—they fail similarly.
Estimated cost: $600-1,200
Fuel Filter/Fuel Pump Assembly Clogging
Occasional · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Hard starting after sitting overnight, Hesitation or stumbling during acceleration, Limp mode activation under heavy throttle, Fuel pressure codes, Stalling when fuel tank below 1/4 full
Fix: In-tank fuel filter clogs or pump weakens. Filter not serviceable separately in many cases—requires entire pump module. Tank must be dropped. 4-6 hours labor. Use quality fuel and keep tank above 1/4 to extend life.
Estimated cost: $1,200-2,200
Electrical Gremlins (Instrument Cluster and Module Failures)
Occasional · medium severitySymptoms: Intermittent gauge failures or flickering displays, Random warning lights that clear on restart, Infotainment freezing or rebooting, Battery drain when parked, Module communication faults
Fix: Various control modules suffer from software glitches or solder joint failures. Diagnosis requires manufacturer scan tool. Software updates fix some issues; hardware replacement needed for others. Instrument cluster replacement runs 3-4 hours, other modules vary. Check for TSBs first.
Estimated cost: $800-3,500
Avoid unless you have deep pockets or comprehensive warranty—the engine failure risk alone makes this a financial gamble most DIYers and independents should pass on.
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.