⚠️ Toyota Prius — Moderate misfuel risk
Petrol-only tank; diesel forecourt error is main risk. HV disable required before interior work.
If the engine was not started
Do not crank; disable HV; drain via pump access before start.
If the engine was started
Replace filter; inspect injectors and catalyst; verify HV system after service.
⚠️ Toyota position — Prius
Toyota classifies misfuelling as misuse excluded from Toyota New Zealand warranty. Follow hybrid disable and fuel pump module removal in TIS.
Vehicle information
| Specification | Details |
|---|---|
| Make | Toyota |
| Model | Prius |
| Market status | Sold new in NZ across multiple generations; common in used market |
| Body styles | Liftback; Prius v/Alpha imports as wagons |
| Generations | XW10 through XW60 depending on model year in NZ |
| Engines | Petrol: 1.5-litre–2.0-litre Atkinson-cycle petrol (hybrid); Hybrid: Toyota Hybrid System |
| Fuel tank capacity | Approximately 43–50 litres — consult OEM |
| Fuel system | Petrol injection with hybrid HV interlocks before pump access |
| Access method | Fuel pump access panel under rear seat (typical Prius) |
| Anti-siphon | Yes — filler neck anti-siphon and ORVR |
| OEM service portal | Toyota TIS / Techstream via Toyota New Zealand dealers |
OEM access procedure
- Secure the vehicle with ignition OFF; do not start the engine if the wrong fuel was added.
- Confirm contamination type and whether the engine was cranked or driven.
- Relieve fuel system pressure per the OEM workshop manual.
- Disconnect the 12 V negative battery terminal; hybrid, PHEV, and EV models require OEM high-voltage disable first.
- Access the tank via the OEM fuel pump access panel or by lowering the tank per the workshop manual.
- Drain contaminated fuel into approved containers; dispose via a licensed collector under HSNO Act 1996 and regional council rules.
- Replace the fuel filter and inspect lines; flush if the engine ran on contaminated fuel.
- Refill with correct NZ fuel (91/95/98 petrol, diesel, or AdBlue only in the AdBlue tank), prime, leak-check, and test per OEM.
Frequently asked questions
Must the high-voltage system be disabled before draining a Prius?
Yes. Follow Toyota hybrid service information before removing the rear seat and accessing the fuel pump module.
What if I put diesel in my Prius?
Do not start the engine. Drain via Toyota pump access, replace the fuel filter, and flush lines before refilling with petrol.
Is misfuel covered under Toyota warranty in NZ?
No. Incorrect fuel is misuse and is excluded from warranty.
Need certified fuel contamination service?
Find an NZIFDA certified operator or read consumer guidance on wrong-fuel incidents.
Find an operatorFor consumers