The first-gen RAV4 was Toyota's entry into compact crossovers, and the '97 with the 2.0L 3S-FE is generally reliable but known for head gasket failures and automatic transmission oil cooler leaks that can destroy the trans if ignored.
Head Gasket Failure (2.0L 3S-FE)
Common · high severityTypical onset: 100,000-150,000 mi
Symptoms: White smoke from exhaust on cold start, Coolant loss with no visible external leaks, Overheating or fluctuating temp gauge, Milky oil or oil in coolant reservoir
Fix: Replace head gasket, resurface head, new timing belt/water pump while in there. 8-12 labor hours. If caught late, you're looking at warped head or cracked block requiring full rebuild.
Estimated cost: $1,200-2,000
Automatic Transmission Oil Cooler Leaks into Radiator
Common · high severityTypical onset: 80,000-130,000 mi
Symptoms: Pink or milky transmission fluid on dipstick, Transmission slipping or delayed engagement, Coolant reservoir looks like strawberry milkshake, Overheating transmission
Fix: Radiator has integral ATF cooler that fails internally, cross-contaminating coolant and trans fluid. Requires new radiator, full trans flush (or replacement if contamination went too far), new hoses. 6-8 hours labor if trans is still good; add 12-18 hours if trans needs rebuild.
Estimated cost: $800-1,200 (catch early); $2,500-4,000 (with trans damage)
Rear Differential Pinion Seal Leak
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: Gear oil dripping from rear diff onto driveway, Whining noise from rear on deceleration if fluid gets low, Visible wetness around pinion flange
Fix: Replace pinion seal, check pinion bearing preload. 2-3 hours labor. If ignored until bearings are damaged, full diff rebuild required.
Estimated cost: $300-500
Oxygen Sensor Failure (Front Bank)
Common · low severityTypical onset: 120,000-160,000 mi
Symptoms: Check engine light with P0135 or P0141 codes, Poor fuel economy (drop of 2-4 mpg), Rough idle when cold, Failed emissions test
Fix: Replace upstream or downstream O2 sensor. These seize in the exhaust manifold on older cars, so factor in penetrating oil soak time or potential for snapped sensor. 1-1.5 hours labor per sensor.
Estimated cost: $180-280 per sensor
Ignition Coil / Distributor Cap Deterioration
Occasional · medium severityTypical onset: 100,000+ mi
Symptoms: Intermittent misfire, especially in damp weather, Hesitation or stumble under acceleration, Hard starting when engine is hot, Check engine light with random misfire codes
Fix: Replace distributor cap, rotor, plug wires as a set. Ignition coil inside distributor can also fail. 1.5-2 hours labor for cap/rotor/wires; add 1 hour if coil needs replacement.
Estimated cost: $250-450
CV Axle Boots Tear (4WD Models)
Common · medium severityTypical onset: 80,000-120,000 mi
Symptoms: Clicking or popping noise during tight turns, Grease visible on inside of wheel, Torn rubber boot visible on inspection
Fix: Replace CV axle assembly (easier than repacking boot on high-mileage axles). 2-3 hours per side. Fronts fail more often than rears on 4WD.
Estimated cost: $350-550 per axle
Buy it if the head gasket and radiator have already been done and documented — otherwise budget $2,000-3,000 for deferred maintenance within the first year.
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.