2007 LEXUS RX 400H

Typical onset: 80,000-150,000 mi

Symptoms: Burns 1+ quart per 1,000 miles, Blue smoke on cold start or acceleration, Check engine light with P0300-series misfire codes, Fouled spark plugs requiring frequent replacement

Fix: 2GR-FXE engine has weak piston ring design causing oil control issues. Real fix requires engine rebuild with updated rings or replacement short block. Shops charge 18-25 hours labor for engine removal and rebuild. Many owners defer and just add oil frequently, risking catalytic converter damage.

Estimated cost: $4,500-7,500

Typical onset: 120,000-180,000 mi

Symptoms: Red triangle warning light with multiple hybrid codes (P0A93, P0A94), Reduced power or 'limp mode' operation, Overheating inverter causes vehicle to shut down, Coolant leaks near rear of engine bay from inverter assembly

Fix: Electric coolant pump for inverter fails, or inverter cooling passages clog. Pump replacement is 3-4 hours, but inverter itself failing requires remanufactured unit plus 6-8 hours labor. Must use Toyota red hybrid coolant and properly bleed system. This is the #1 hybrid system failure on this generation.

Estimated cost: $800-4,200

Typical onset: 100,000-150,000 mi

Symptoms: Pink fluid dripping from front of vehicle, Transmission slipping or hesitation during acceleration, Whining noise from transaxle, Milky transmission fluid indicating coolant intrusion

Fix: External oil cooler lines corrode and leak, or internal cooler in radiator fails allowing coolant/ATF mixing. External cooler line replacement is 2-3 hours. If coolant contaminated the CVT, requires complete flush and potential transaxle rebuild (25+ hours). Always inspect fluid condition carefully.

Estimated cost: $400-6,500

Typical onset: 90,000-140,000 mi

Symptoms: Clunking when shifting from Park to Drive/Reverse, Vibration at idle especially with A/C on, Excessive engine movement visible from outside, Metallic knocking over bumps

Fix: Hydraulic engine/trans mounts fail from hybrid system's frequent start-stop cycling. Front mount is 2 hours, rear mount 3-4 hours due to limited access behind transaxle. OEM mounts last longer than aftermarket. Replace both sides when doing this job to avoid repeat labor.

Estimated cost: $600-1,200

Typical onset: 150,000-200,000 mi

Symptoms: Reduced fuel economy (MPG drops 4-6 below normal), Battery state-of-charge indicator fluctuates rapidly, Red triangle with P0A80 hybrid battery pack code, Engine runs excessively to maintain charge, Reduced power during acceleration

Fix: NiMH battery pack develops weak cells causing imbalance. Toyota dealer quotes $5,000+ for new pack. Many owners go aftermarket refurbished ($2,500-3,500) or module replacement service. Some shops will replace individual modules (8-12 hours labor) but results vary. California cars with PZEV warranty covered to 150k miles.

Estimated cost: $2,200-5,500

Typical onset: 80,000-120,000 mi

Symptoms: Clunking from front suspension over bumps, Steering wander or vague on-center feel, Inner tire edge wear, Fails alignment specs even after adjustment

Fix: Front lower control arm bushings separate, causing alignment issues and handling problems. Must replace entire control arm assemblies as bushings aren't serviceable separately on this platform. 2.5-3 hours per side including alignment. Do both sides and all four wheel alignment afterward.

Estimated cost: $800-1,200