Thinking about buying a used Mitsubishi Airtrek (2003–2024) in New Zealand? We've documented 43 known faults for this model spanning fluid leaks, transmission, engine, and electrical. 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.
43
Documented faults
Critical
Most serious
$900–$3,500
Typical repair
8
Systems covered
Known Mitsubishi Airtrek faults
Every fault below is documented specifically for this model — researched and verified before it’s published.
01Front Motor Oil Seal Leak — Inverter Contamination Risk
CriticalOccasionalFluid Leaks $900–$9,500 to fix
The front electric traction motor in the Outlander PHEV shares a reduction gear assembly that uses transmission fluid for lubrication. The shaft oil seals on this unit deteriorate with age and accumulated heat cycles, allowing gear fluid to migrate toward the high-voltage inverter module mounted directly above and adjacent to the motor. Even a small quantity of fluid contaminating the inverter can cause insulation resistance faults, high-voltage warning lights, and ultimately full inverter failure — one of the most expensive PHEV repairs available. The fault is often subtle early on, presenting as only a faint oily residue or gear oil smell near the front motor. If caught before fluid reaches the inverter, a seal replacement is straightforward; if the inverter is already contaminated the repair bill increases dramatically.
Symptoms to notice
Oily film or gear oil smell from the front motor area under the bonnet
High voltage system warning light or P3000-range fault codes
EV mode unavailable or unexpectedly limited
Insulation resistance fault codes logged in the hybrid control unit
Visible fluid staining on front motor casing or adjacent wiring harness
What to check
Physically inspect the front electric motor area for any oily residue, discolouration, or gear oil smell — focus on the motor shaft exit points at the reduction gearbox. Request a workshop scan specifically for high-voltage insulation fault codes. Ask for any documented history of motor, inverter, or front drive unit service. Do not purchase any PHEV showing active high-voltage system warning lights without specialist clearance.
Where to look: Front engine bay — front electric motor reduction gearbox output shaft seals and adjacent high-voltage inverter unit
Ask the seller
“Has the front electric motor or inverter ever been replaced or repaired?”
“Are there any active or stored high-voltage system or insulation fault codes?”
“Has any fluid leak or oily residue been noticed near the front of the engine bay?”
“Has the vehicle had a pre-purchase inspection that included a high-voltage system check?”
02PHEV Charging Port Door Actuator Failure
MinorCommonElectrical $350–$1,100 to fix
The motorised charging port door on GF7W Outlander PHEVs uses a small electric actuator to open and close the flap on command from the key fob, dashboard button, or charging cable insertion. The actuator motor and its plastic gear train are exposed to weather and temperature cycles. Failure of the actuator leaves the charging port door stuck either open or closed. A door stuck closed prevents charging entirely; a door stuck open admits water to the charging socket area. Repeated partial failures manifest as slow or intermittent door operation before complete seizure.
Symptoms to notice
Charging port door failing to open or close on command from the key fob or interior switch, or operating intermittently with slow and grinding movement
Charging system warning message on the dashboard instrument cluster related to an inlet door fault, preventing the vehicle from accepting a charge
What to check
Operate the charging port door open and close several times using the key fob and the interior button — it should move smoothly and fully seat in both positions without hesitation. Listen for grinding or slow motor operation indicating gear wear. Inspect the door surround for water ingress marks or corrosion around the charging socket. Check for fault codes related to the charging system inlet door in the PHEV EV module.
Where to look: Front charging port door actuator, located in the front bumper charging inlet assembly
Ask the seller
“Does the charging port door open and close reliably every time?”
“Has the charging door ever needed to be opened manually?”
“Has any charging-related warning appeared on the dashboard?”
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41 more documented faults on the Mitsubishi Airtrek
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 43 documented faults for the Mitsubishi Airtrek, the recurring problem areas are fluid leaks, transmission, and engine. A Mitsubishi Airtrek 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 Mitsubishi Airtrek?
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We've catalogued 43 known faults for the Mitsubishi Airtrek, covering fluid leaks, 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 Mitsubishi Airtrek?
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Most single repairs on the Mitsubishi Airtrek fall between $900–$3,500 at NZ independent-workshop rates. Some of the 43 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 Mitsubishi Airtrek?
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Yes. A Mitsubishi Airtrek 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.