Thinking about buying a used Toyota Alphard (2002–2023) in New Zealand? We've documented 59 known faults for this model spanning electrical, transmission, engine, and brakes. Each researched and verified before it's published. The most serious issues here are rated critical. Two are set out in full below — the rest, with the symptoms, repair costs and checks for each, are free with an account.
59
Documented faults
Critical
Most serious
$600–$2,200
Typical repair
8
Systems covered
Known Toyota Alphard faults
Every fault below is documented specifically for this model — researched and verified before it’s published.
01H30 Hybrid Inverter / MG Unit Warning and Failure
CriticalOccasionalElectrical $4,000–$14,000 to fix
The H30 Alphard Hybrid (A25A-FXS system) uses a high-voltage inverter/converter unit to manage power flow between the electric motor-generators and the NiMH or lithium battery. The inverter is a known failure point on Toyota THS-II systems generally, with coolant leaks from the inverter cooling circuit causing internal corrosion and MG1/MG2 insulation faults. Failure manifests as a red triangle warning, loss of hybrid drive, and in severe cases complete electrical system shutdown. Toyota service campaign data from Japan documents inverter cooling failures on early H30 production.
Symptoms to notice
Red triangle master warning light on dash
Hybrid system inoperative warning displayed
Vehicle enters limp mode or will not start
Inverter cooling system low fluid warning
What to check
Check the inverter cooling reservoir (separate from the engine cooling circuit) for correct level and condition — fluid should be clear pink Toyota Super Long Life coolant. Scan for HV system DTCs using Techstream: P0A09 (DC/DC converter performance), P0A94 (DC/DC converter performance), and motor-generator codes P0A78/P0A7A indicate inverter-side issues. Confirm no warning lights are currently stored. Ask whether any hybrid system warnings have appeared, even temporarily.
Where to look: High-voltage inverter/converter unit, engine compartment upper area
Ask the seller
“Has a red triangle or hybrid system warning ever appeared?”
“Has the inverter cooling fluid been checked or topped up?”
“Has the vehicle ever entered limp mode or refused to start due to a hybrid fault?”
02Electric Power Steering Rack Rattle
MinorCommonElectrical $600–$2,200 to fix
EPS rack develops internal rattle at low speeds over rough surfaces on high-km Alphard examples.
Symptoms to notice
Knocking or rattling from steering rack at low speeds
Vibration through steering wheel during slow manoeuvring
What to check
Drive over rough surfaces at low speed and listen for rattle from the steering rack area.
Where to look: Electric power steering rack assembly
Ask the seller
“Has the electric power steering rack rattle been inspected or repaired?”
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Fluid LeaksCritical
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57 more documented faults on the Toyota Alphard
Symptoms, what to check, where to look and what to ask the seller — for every fault above. Free with an account, no card needed. One account covers one vehicle, so make it the car you’re actually looking at.
This page covers the model. Enter the plate of the actual car you’re looking at and see its year, engine, safety rating and register flags — free, no account needed.
Like any used car, it depends on the specific example and its service history. Across the 59 documented faults for the Toyota Alphard, the recurring problem areas are electrical, transmission, and engine. A Toyota Alphard with a full service history and no signs of the issues listed on this page can be a sound buy but each one needs to be checked individually before you commit.
What are the most common problems with a used Toyota Alphard?
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We've catalogued 59 known faults for the Toyota Alphard, covering electrical, transmission, and engine. Two are written out in full on this page. The rest — with the symptoms to notice, what to inspect, and typical repair costs for each — are free once you create an account.
How much do repairs cost on a Toyota Alphard?
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Most single repairs on the Toyota Alphard fall between $600–$2,200 at NZ independent-workshop rates. Some of the 59 documented faults cost less and a few cost considerably more, and no one car needs them all. Knowing which ones to look for before you view is what lets you negotiate the price down or walk away.
Should I get a pre-purchase inspection on a Toyota Alphard?
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Yes. A Toyota Alphard inspection focused on its known weak points is the single best way to avoid an expensive mistake. KickTyres gives you a guided, model-specific inspection plus a market valuation and negotiation figure for $17.90 far less than the cost of missing one of the faults on this page.