Toyota Avensis
2.4-litre four-cylinder with VVT-i and an aluminium block. Same porous cylinder head issue as the 1AZ-FE on early build years (elevated oil consumption). Toyota extended the warranty. Later versions better.
Displacement without emotion
120 kW 2.4 with automatic — designed for the US market, out of place in the European Avensis. Pleasant, but disengaged.
Engine Weaknesses 6
Toyota issued an official TSB and a Limited Service Campaign: the 2AZ-FE consumes excessive oil due to factory-underspec oil control rings.
Symptoms: Oil consumption over 1 L/1,000 km; bluish exhaust smoke; engine warning light; seized piston rings
As with the related 1AZ-FE, the head gasket on the 2AZ-FE can fail, aggravated by thread failures in the engine block. Typical AZ weakness.
Symptoms: Coolant loss; white exhaust smoke; foaming in the oil; engine overheating
The plastic balance shaft gear on the 2AZ-FE can disintegrate and distribute debris through the oil circuit. The problem mainly affects older high-mileage vehicles and leads to elevated repair costs from consequential damage.
Symptoms: Metallic grinding noises, metal swarf in the oil, oil pressure drop
In the aluminium block of the 2AZ-FE the M11 head bolt threads can strip during overheating or incorrect assembly. Toyota developed revised bolts that workshops should use for any cylinder head work.
Symptoms: Coolant loss, difficult running after cylinder head work, compression drop
The thermostat and water pump are typical wear items on the 2AZ-FE. A faulty thermostat can force coolant out under excess pressure. Aisin components are recommended.
Symptoms: Coolant loss, overheating, thermostat stuck either open or closed
The 2AZ-FE shows issues with the EVAP system (evaporative emission control), particularly the charcoal canister. Fault codes appear without causing immediate driveability problems.
Symptoms: Engine warning light, EVAP system fault codes, P0446 or similar codes
Vehicle Weaknesses 9
Underbody protection on the T250 is only moderately applied. Rust pockets form at welded joints, subframes and sills.
The evaporator behind the dashboard corrodes and loses refrigerant. Repair is labour-intensive due to the need to remove the dashboard.
Driveshaft gaiters split and steering gear covers develop leaks. Track rod ends can come loose if incorrectly fitted.
Dashboard illumination fails, radio display shows errors or goes blank. Tail lights can become unsealed.
The rear brake discs warp from approximately 60,000 km, especially on estate variants with frequent loading.
Play in the steering column universal joint produces a knocking noise during steering inputs, particularly on uneven surfaces.
The hydraulic power steering on the T250 develops squealing or groaning noises with age, traceable to the seal ring around the steering spindle or worn steering components. Temporarily eased with lubricant.
The T250's boot lid lock has no manual emergency release. If the electric lock or remote control fails, the boot stays locked. The electric lock system is susceptible to control unit faults.
The driver's seat heating on the T250 can fail at higher mileage while the indicator light continues to show it as active. Defective heating mats or broken wiring in the movable seat are the usual cause.