The 2007 Tucson is a budget-friendly compact SUV, but the 2.0L I4 has catastrophic engine failure issues from oil sludge and bearing wear, while the 2.7L V6 is significantly more reliable. Transmission cooling and mount failures are common across both engine options.
2.0L I4 Engine Catastrophic Failure (Theta II)
Common · high severityTypical onset: 80,000-130,000 mi
Symptoms: Metallic knocking or ticking from engine block, Low oil pressure warning even with adequate oil level, Metal shavings visible in oil during changes, Sudden loss of power or complete engine seizure
Fix: Complete engine replacement or rebuild required. Connecting rod bearings fail first, causing spun bearings and crank damage. Short block replacement takes 14-18 labor hours; used engine swap 10-14 hours. Root cause is inadequate oil flow to main and rod bearings combined with sludge buildup if oil changes exceeded 5,000 mi intervals.
Estimated cost: $3,500-6,500
Transmission Oil Cooler Line Failure
Common · high severityTypical onset: 70,000-110,000 mi
Symptoms: Transmission fluid leaking near radiator, Transmission overheating warnings, Pink or red fluid dripping under front of vehicle, Harsh shifting or slipping after engine reaches operating temp
Fix: Cooler lines corrode where they connect to radiator and at crimped fittings. Requires replacement of both cooler lines and often external transmission filter if equipped. If coolant mixes with ATF, full transmission flush mandatory. 2-3 labor hours for lines only, 4-6 hours if contamination cleanup needed.
Estimated cost: $400-900
Transmission Mount Collapse
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Clunking noise when shifting from Park to Drive or Reverse, Excessive vibration at idle in Drive, Visible engine/transmission movement when accelerating or braking, Shifter feels loose or has excessive play
Fix: Rear transmission mount deteriorates from heat and oil exposure. Rubber separates from metal bracket causing drivetrain to sag. Replacement requires supporting transmission and removing through-bolts. 1.5-2.5 labor hours. Inspect engine mounts simultaneously as they often fail together.
Estimated cost: $250-450
Brake Light Switch Premature Failure
Common · medium severitySymptoms: Brake lights stay on continuously, Brake lights don't illuminate when pedal pressed, Cannot shift out of Park position, Cruise control won't engage or disengages randomly
Fix: Switch mounted above brake pedal fails internally from heat cycles and contact wear. Part is plastic-bodied and fractures. Subject to NHTSA recall but many units still fail post-recall. Replacement takes 0.3-0.5 labor hours. Critical safety item affecting transmission interlock and following traffic awareness.
Estimated cost: $120-220
Front Wheel Bearing Premature Wear
Occasional · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Grinding or humming noise that changes with vehicle speed, Noise increases during turns (louder when turning opposite the failing side), Wheel has play when vehicle lifted and wheel rocked by hand, ABS warning light may illuminate
Fix: Hub bearing assemblies wear prematurely, especially on AWD models. Seal failure allows contamination. Requires pressing out old bearing and pressing in new unit, or replacing entire hub assembly (recommended). 2-2.5 labor hours per side. Always replace in pairs for even wear characteristics.
Estimated cost: $350-600
2.7L V6 Valve Cover Gasket Leaks
Occasional · low severityTypical onset: 90,000-140,000 mi
Symptoms: Oil smell from engine bay after driving, Oil residue visible on outside of valve covers, Oil pooling on top of exhaust manifold causing smoke, Low oil level between changes
Fix: Valve cover gaskets harden and crack over time. More common on rear bank due to heat. Requires removing valve covers, cleaning mating surfaces, new gaskets and spark plug tube seals. 3-4 labor hours for both banks. Not urgent but prevent before oil migrates to ignition components.
Estimated cost: $400-650
Fuel Filter Clogging (Early Failure)
Occasional · medium severityTypical onset: 40,000-70,000 mi
Symptoms: Hard starting after sitting overnight, Loss of power during acceleration, Engine stumbling or hesitation under load, Check engine light with lean fuel codes P0171/P0174
Fix: In-tank fuel filter screens clog prematurely from poor fuel quality or tank debris. Requires dropping fuel tank to access pump assembly and filter. Some techs replace entire pump module to ensure long-term reliability. 2.5-3.5 labor hours. More common in vehicles used with minimum fuel levels frequently.
Estimated cost: $300-650
Buy only if it has the 2.7L V6 with documented maintenance; avoid 2.0L I4 models entirely due to unacceptable engine failure rates.
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.