Toyota Prius XW20
Weaknesses, engine ratings and buying advice
The second-generation Prius (2004–2009) proved hybrids work. One million sold by 2008. Budget city car — if you know what to check.
HV battery: Every Gen 2 is past its design life. Remanufactured pack: $950–$2,600. Code P0A80 = replacement needed.
Inverter coolant pump: Gen 2’s most notorious failure. Code P0A93. OEM only — $300–$600.
Dashboard cluster: Capacitors fail on combination meter — speedometer goes dark. Common on 2004–2006 (~$200 refurb).
Cat converter theft: Gen 2 is the #1 stolen hybrid cat in North America.
Best buy: 2008–2009. 2026 price: $3,000–$8,000.
Generations
Engine Overview
The Toyota Prius XW20 is available with one engine variant at 72 hp.
Hybrid engine running the Atkinson cycle, known from the Prius II. Extremely economical and reliable. The high-voltage battery typically lasts over 200,000 km; replacement cost on failure is moderate.
- !! Oil consumption from piston ring wear from 200,000 km
From around 200,000 km the Atkinson-cycle engine in the Prius XW20 tends towards elevated oil consumption due to worn piston rings. Extended periods standing still and short trips accelerate wear.
Symptoms: Oil consumption above 0.5 l/1,000 km; faint blue smoke from the exhaust under power demand - !! Timing chain stretch and VVT noises from 175,000 km
At high mileage the timing chain can over-stretch. The VVT actuator produces noises after cold start when oil pressure has not yet built up.
Symptoms: Rattling after cold start from the engine bay, fading as the engine warms up; rough idle immediately after starting - !! EGR channel and intake manifold coked up from 150,000 km
From around 150,000 km the EGR channels and intake manifold can clog with carbon deposits, leading to elevated combustion temperatures and engine faults. Cleaning or replacement is necessary.
Symptoms: Hesitation and power loss, fault code P0401 (insufficient EGR flow), elevated exhaust emissions
+ 4 more engine weaknesses + vehicle weaknesses
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Brake Disc Rust from Regenerative Braking Since the Prius XW20 relies primarily on regenerative braking, the brake discs are rarely used mechanically and rust quickly. Symptoms: Scraping and squealing when braking, extended stopping distance, vibration through the pedal. from 80,000 km | Low |
Top Reported Issues
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Known Problems and Issues +
A total of 17 weaknesses have been documented for the Toyota Prius XW20 (2003–2009) — 7 engine-related and 10 vehicle-related. Typical issues affect Brakes, Electronics, Suspension, Cooling.
Prius (1NZ-FXE, 2003–2009) — Be Careful: Oil consumption from piston ring wear, Timing chain stretch and VVT noises, EGR channel and intake manifold coked up. Power: 72–77 PS.
What to watch out for with the Toyota Prius? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
What problems and weaknesses does the Toyota Prius XW20 have? +
What should I look for when buying a used Toyota Prius XW20? +
Which engine is recommended? +
Which Toyota Prius XW20 engine is the most fun? +
Is the Toyota Prius XW20 worth buying used? +
What horsepower variants are available for the Toyota Prius XW20? +
Last updated: February 2026 · All information without guarantee