⚠️ Mitsubishi manufacturer position
Mitsubishi service information requires draining via the in-tank pump module access (typically under the rear seat/load floor) or tank lowering where specified. Fuel contamination due to wrong fuel is excluded from warranty as misuse.
Vehicle information
| Make | Mitsubishi |
|---|---|
| Model | ASX |
| Market status | Sold new in Great Britain 2010–2024 (run-out into 2025) |
| Body styles | Compact SUV |
| Generations | GA (2010–2019), GK facelift (2019–2024) |
| Engine options | Petrol: 1.6–2.0 L petrol (4A92, 4J11, and related MIVEC engines on UK specs) Diesel: 1.8 L diesel (4N13) on earlier UK cars; later UK line predominantly petrol |
| Fuel tank capacity | Approximately 60 litres — varies by model year; consult OEM data |
| Fuel system | Petrol MPI or diesel common-rail depending on variant; diesel uses high-pressure pump and piezo/solenoid injectors |
| Access method | Fuel pump access panel under rear load floor on most UK ASX — consult OEM for year |
| Anti-siphon | Yes — filler-neck restrictor and roll-over valve on UK models |
| Service portal | Mitsubishi Motors UK service literature / MMCS Europe technical |
Misfuel risk Moderate
Petrol and diesel variants share similar filler arrangements; mis-fuelling most often affects diesel models where petrol causes immediate high-pressure system risk.
If the engine was not started
Do not start. Drain tank, replace fuel filter, flush low-pressure lines, refill with correct fuel, and prime per Mitsubishi procedure.
If the engine was started
If petrol was run in a diesel ASX, inspect high-pressure pump, rail, and injectors; flush entire circuit; metal debris may require component replacement.
Access procedure
- Disconnect the negative battery terminal and relieve fuel system pressure per OEM procedure.
- Access the in-tank fuel pump module via the manufacturer-specified route (access panel or tank lowering).
- Drain contaminated fuel using approved recovery equipment into suitable containers for hazardous waste duty of care.
- Inspect the tank, sender unit, and lines; replace the fuel filter and any contaminated flexible lines as required.
- Reassemble, refill with the correct fuel grade, prime the low-pressure circuit, and check for leaks before start.
- If the engine was run on wrong fuel, follow OEM guidance for high-pressure pump, rail, and injector inspection before restart.
Notes
- Also marketed as RVR in some export markets — UK name is ASX.
Related models
Frequently asked questions
What should I do if I put petrol in my Mitsubishi ASX diesel?
Do not start the engine or turn the ignition on. Have the fuel extracted from the tank using OEM-prescribed access methods and dispose of contaminated fuel under your duty of care (Environmental Protection Act 1990). Use a GBIFDA-certified technician where possible.
Will Mitsubishi warranty cover misfuel damage on a ASX?
Mitsubishi typically classifies wrong-fuel events as customer misuse, which is excluded from warranty. Repairs are usually funded by the driver, insurer, or breakdown cover subject to policy terms.
Can contaminated fuel be siphoned from a Mitsubishi ASX?
Most UK-market Mitsubishi models have filler-neck anti-siphon features. OEM service information normally requires pump-module access or tank lowering rather than suction through the filler neck.
Does a Mitsubishi ASX need new injectors after misfuel?
If the engine was not started, draining, filtering, and line flush may be sufficient. If it was driven on wrong fuel, high-pressure pump and injector inspection or replacement is commonly required per OEM diagnostics.
Need professional misfuel recovery?
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