Toyota Allion: common faults & what to check

Which Toyota Allion are you looking at?

6 generation variants documented. Pick the shape you recognise: the faults, the servicing and the timeline below all narrow to it. Free, no account needed.

Petrol

6 variants documented

2001–2007T2402001–2007T2401.5 petrolPetrolDocumented issues3 knownSee faults & what to checkPhoto: Mytho88 via Wikimedia Commons, CC BY-SA 3.0.

2001–2007T2402001–2007T2401.8 petrolPetrolDocumented issues4 knownSee faults & what to checkPhoto: Mytho88 via Wikimedia Commons, CC BY-SA 3.0.

2001–2007T2402001–2007T2402.0 petrolPetrolDocumented issues5 knownSee faults & what to checkPhoto: Mytho88 via Wikimedia Commons, CC BY-SA 3.0.

2007–2021T2602007–2021T2601.5 petrolPetrolDocumented issues7 knownSee faults & what to checkKickTyres illustration, not a photograph.

2007–2021T2602007–2021T2601.8 petrolPetrolDocumented issues8 knownSee faults & what to checkKickTyres illustration, not a photograph.

2007–2021T2602007–2021T2602.0 petrolPetrolDocumented issues7 knownSee faults & what to checkKickTyres illustration, not a photograph.

Now narrow it to the engine

A 1.8 and a 2.4 of the same car do not fail the same way, so the faults below narrow to the engine as well as the year. Free, no account needed.

Start your free check on this Toyota Allion

No plate needed. You get the risk score, the buyer's checklist and the guided inspection for the exact car you picked above — not the whole nameplate.

The checks worth doing on a Toyota Allion before you hand over any money. Every documented fault is listed below, each with its own page.

• Serious issue

  Visually inspect the ball joint boot for cracks or grease leakage.

  See why

  Front Lower Control Arm Ball Joint Failure

  The front lower control arm ball joints on both ZZT240 and ZRT260 Allion are a documented wear item that degrades at relatively low mileage on NZ roads. Failed ball joints cause steering vagueness and clunking over bumps. In a severely worn state the joint can separate from the control arm, creating a safety-critical loss of steering control. NZ WOF inspection failures for front ball joint play are commonly reported on imported Allion vehicles.

  What you would notice

  • Clunking or knocking from the front suspension over bumps
  • Vague or imprecise steering
  • Uneven or premature front tyre wear
  • Vehicle pulling to one side on a flat road

  Typically $400–$900 to put right.

• Serious issue

  With the engine cold, open the radiator cap and reservoir: the coolant should be clean, bright and at the full mark.

  See why

  Stripped head-bolt threads in the alloy block causing sudden coolant loss (2.0 1AZ-FSE)

  AZ-series blocks cast before mid-2007 have shallow head-bolt threads at the thinnest rear section of the aluminium block. The threads can strip without warning, letting the head lift, which blows the head gasket and dumps coolant — the same well-documented failure seen on 1AZ/2AZ RAV4, Avensis and Camry. Caught early it is repairable with thread inserts (Time-Sert style); driven on while overheating, the engine is usually scrap. It is an occasional rather than universal failure, but it is catastrophic when it happens, so treat any coolant-loss history on a 2.0 T240 seriously.

  What you would notice

  • Coolant level dropping with no visible leak, or sudden total coolant loss
  • Overheating on hills or motorway driving
  • Sweet coolant smell or steam from the engine bay
  • White residue or crusty coolant staining around the rear of the cylinder head
  • Bubbles in the coolant reservoir with the engine running

  Typically $1,800–$5,000 to put right.

• Costly issue

  Check the dipstick for oil level and colour.

  See why

  1ZZ-FE / 3ZR-FAE Excessive Oil Consumption

  Both the 1ZZ-FE engine (ZZT240 Allion, 2001 to 2007) and the 3ZR-FAE engine (ZRT260 Allion, 2007 to 2021) are documented for excessive oil consumption. The 1ZZ-FE piston ring design was a known defect shared with the Corolla and Caldina; Toyota acknowledged this with a TSB and extended warranty in some markets. The 3ZR-FAE has the same piston ring sealing issue documented by Japanese mechanics and is evident on NZ import vehicles. Both engines can consume up to 1 litre per 2,000 km in affected examples.

  What you would notice

  • Oil level drops between service intervals
  • Blue or grey smoke from exhaust on deceleration or cold start
  • Oil-fouled spark plugs
  • Low oil warning light illuminating

  Typically $2,200–$4,500 to put right.

• Costly issue

  Let the car idle for several minutes fully warmed up: it should be smooth and steady.

  See why

  D-4 direct-injection carbon build-up, EGR clogging and injector/fuel-pump failures (2.0 1AZ-FSE)

  The 2.0-litre A20 Allion uses Toyota's first-generation D-4 direct-injection 1AZ-FSE, which is notorious for carbon caking onto the intake valves and EGR system because fuel never washes over them. The result is rough idle, misfires, hesitation and hard starting, and mechanics in JDM markets openly advise against the D-4 versions for this reason. The high-pressure fuel pump and injectors are also sensitive to fuel quality and are expensive to replace. A walnut-blast or chemical intake clean restores running, but the build-up returns every 60,000-100,000 km unless the car does regular long runs.

  What you would notice

  • Rough, lumpy idle around 500-600 rpm, sometimes with the whole car shuddering
  • Hesitation or flat spots when accelerating
  • Hard starting, especially when cold
  • Check-engine light with misfire codes
  • Noticeably worse fuel economy than the 1.5/1.8 models

  Typically $500–$2,500 to put right.

• Costly issue

  Start the test drive from cold if possible.

  See why

  Super CVT-i (K310/K311) shudder, whine and belt failure from fluid neglect

  T260 Allions use Toyota's Super CVT-i belt-and-pulley transmission, which is reliable only if the special CVT fluid is actually changed. Toyota's 100,000 km 'maintenance-free' interval is widely regarded as too long for stop-start use, and most JDM imports arrive in NZ with zero fluid-change history. Neglected units develop shudder off the line, whining, jerky or flaring engagement and eventually belt slip; owner forums document the failure progressing in stages from repairable valve-body/clutch issues to terminal belt damage. A fresh fluid service can save an early case, but a slipping unit needs a replacement transmission — NZ CVT specialists quote roughly $2,600-$3,900 for the unit plus about $900-$1,000 fitting.

  What you would notice

  • Shudder or vibration pulling away from a stop
  • High-pitched whine that rises with road speed
  • Engine revs flaring without matching acceleration (belt slip)
  • Jerk or clunk when selecting Drive or Reverse
  • Delay before the car moves after selecting gear

  Typically $300–$4,900 to put right.

• Costly issue

  With the engine cold, pull the dipstick and check the level and colour — jet-black, low oil is a red flag.

  See why

  Excessive oil consumption from clogged piston oil-return holes (1.8 1ZZ-FE)

  Pre-2005 1ZZ-FE 1.8 engines used pistons with undersized oil-return drain holes that clog with sludge, seizing the oil control rings so the engine burns oil — often a litre or more per 1,000 km once it takes hold. Toyota revised the pistons in 2005, so late T240 cars are far less affected. If the sump is allowed to run dry the engine will spin a bearing or seize; many high-km JDM Allions arrive in NZ with no oil-change history, which is exactly the neglect that triggers it. A proper fix means new pistons and rings, so many owners simply carry oil and top up.

  What you would notice

  • Blue-grey smoke from the exhaust on start-up or hard acceleration
  • Oil level drops noticeably between services with no visible leak
  • Low-oil pressure light flickering on corners when the level gets low
  • Fouled spark plugs and rough running in bad cases

  Typically $2,000–$4,500 to put right.

Toyota Allion service schedule

What falls due, and at what distance, for each generation of the Toyota Allion. These are the model’s intervals — the car’s own service book is the only thing that can tell you what has actually been done to it.

What these repairs cost on other cars

Some of the Toyota Allion’s documented faults are repairs other models share. Each page lists the documented NZ cost for every model it affects.

• CVT Gearbox Repair Cost
• EGR Valve and Cooler Repair Cost

Other Toyota models