Parts for your 2023 Mitsubishi Asx-Fuel pump

2023 Mitsubishi ASX Fuel Pump — What it does and when to service it

Technical documentation from Mitsubishi Motors—the ASX/RVR workshop manual (Group 13A: Fuel) and the ASA electronic parts catalogue for GA2W—confirms the 2023 ASX 2.0‑litre MIVEC is fitted with an in‑tank electric fuel pump module. That makes the fuel pump absolutely relevant to this model, feeding the Multi Point Injection system at a steady, ECU‑controlled pressure.

On the 2023 ASX, the fuel pump’s job is simple but critical: draw petrol from the tank and deliver it to the fuel rail at a consistent pressure so injectors can do their thing cleanly and efficiently. Housed as a “module” inside the tank, it typically includes the electric pump, a strainer (sock), a built‑in pressure regulator, and the fuel level sender. The ECU commands the pump on and off and keeps pressure in the ballpark for MPI (usually around the 300–350 kPa mark), which helps hot starts, smooth idle and crisp throttle response.

This pump is designed to be largely maintenance‑free, but its life depends on clean fuel and good operating habits. The module’s fine filter is integrated and not routinely serviceable, so prevention matters. Sensible habits include:

• Keeping at least a quarter tank to help cool the pump and avoid picking up sediment.
• Buying quality fuel and avoiding contaminated or stale petrol.
• Replacing the tank seal (O‑ring) if the module is removed to prevent fumes or leaks.

There’s no fixed replacement interval, it’s a replace‑on‑condition item. Warning signs can include longer cranking, hesitation on hills, loss of power at higher revs, a high‑pitched whine from the tank area, or a check engine light with low fuel pressure faults. A workshop will confirm with a fuel pressure test at the rail and scan‑tool checks. Replacement on the ASX is relatively straightforward because the module is accessed via a service cover under the rear seat in most trims—no tank drop needed. Smart practice is to disconnect the battery, work in a well‑ventilated space, relieve system pressure, and mark hoses/connectors before removal. When fitting a new module, always use a fresh sealing ring and verify there are no leaks, then clear any fault codes and road‑test. Look after the pump and it’ll typically last many years and hundreds of thousands of kilometres.

Popular questions

Does the 2023 Mitsubishi ASX have a fuel pump and where is it?
Yes. Technical sources from Mitsubishi confirm an in‑tank electric fuel pump module on the 2.0‑litre MPI engine. It’s accessed via a service panel under the rear seat in most variants, so removal usually doesn’t require dropping the tank.

How often should the ASX fuel pump be replaced?
There’s no set interval. It’s replaced if pressure tests fail or symptoms appear. With clean fuel and sensible driving, the original pump can last the life of the vehicle.

What are common signs the fuel pump is failing on a 2023 ASX?
Long cranking, hesitation under load, a whining noise from the tank area, and low fuel pressure fault codes. A workshop can confirm with a pressure gauge and scan‑tool diagnostics before recommending a replacement.