2006 TOYOTA PRIUS

Typical onset: 120,000-180,000 mi

Symptoms: Red triangle of death with multiple fault codes (P0A80, P3000-P3004), Dramatic fuel economy drop (below 35 mpg combined), Weak acceleration or inability to maintain highway speed, Battery warning light with reduced power mode

Fix: Replace or refurbish the NiMH battery pack. Factory replacement is 3-4 hours labor; refurbished cells from reputable rebuilders cut costs significantly. Many owners opt for aftermarket refurb packs with warranty.

Estimated cost: $1,500-3,500

Typical onset: 100,000-150,000 mi

Symptoms: Red triangle warning with codes P0A93 or P0A94, Whining or grinding noise from under the hood, Inverter overheating (car goes into limp mode), Complete loss of hybrid system function

Fix: Replace the electric inverter coolant pump (G9020-47031). It's a 2-3 hour job requiring coolant drain and refill of the sealed hybrid cooling system. The pump itself is prone to bearing failure and cannot be rebuilt.

Estimated cost: $600-1,200

Typical onset: 80,000-150,000 mi

Symptoms: Burning 1+ quart of oil per 1,000 miles, Blue smoke from exhaust on startup or acceleration, Low oil pressure warning if neglected, Engine knock or seized engine if oil level drops critically

Fix: Toyota issued TSB EG00209T addressing piston ring design flaw. Repair requires short block replacement or complete engine rebuild with updated pistons and rings. 12-16 hours labor for engine removal and rebuild. Some owners qualified for warranty extension, but most 2006 models are out of coverage.

Estimated cost: $3,500-6,000

Typical onset: 80,000-140,000 mi

Symptoms: Multi-function display goes blank or shows garbled pixels, Speedometer or fuel gauge intermittent or dead, Backup camera display flickers or blacks out, All warning lights illuminate simultaneously

Fix: Replace or repair combination meter assembly. Common failure is solder joints on circuit board. Some specialists offer board-level repair for $300-500, otherwise dealer replacement is 1.5-2 hours labor plus expensive part.

Estimated cost: $800-1,800

Typical onset: 60,000-120,000 mi

Symptoms: Steering wheel fails to unlock when starting (trapped key), Red steering wheel warning light with code C1252, Grinding or clicking noise from steering column, Complete inability to start vehicle due to steering lock

Fix: Replace steering lock actuator assembly in the column. Toyota issued recall for some VINs, but many fall outside coverage. 2-3 hours labor to disassemble column and replace actuator. This strands the car if it fails.

Estimated cost: $600-1,200

Symptoms: Yellow, hazy, or cloudy headlight lenses, Reduced nighttime visibility, Moisture intrusion inside lens assembly, Failed state inspection (in some jurisdictions)

Fix: Polishing kits provide temporary fix (6-12 months). Permanent solution is headlight assembly replacement. 0.5 hour per side. Some owners wet-sand and apply UV coating with decent results.

Estimated cost: $300-700

Typical onset: 100,000-160,000 mi

Symptoms: Coolant leak from front of engine (small drips or puddles), Squealing from serpentine belt area, Engine overheating (temperature gauge rises), Visible coolant residue on alternator or belt

Fix: Replace electric water pump for engine cooling (separate from inverter pump). 2-3 hours labor including belt and coolant. The Gen2 Prius has two water pumps—don't confuse this with the inverter pump.

Estimated cost: $500-900