Parts for your 2017 Mitsubishi Asx-Water pump

2017 Mitsubishi ASX Water Pump — What It Does and When to Service It

Technical sources confirm the 2017 Mitsubishi ASX does use a water pump. The Mitsubishi Motors ASX/RVR/Outlander Sport Workshop Manual (2010–2019, Group 14: Cooling) includes removal/installation procedures for the water pump, and the Mitsubishi ASA electronic parts catalogue lists water pump assemblies for the 2.0L petrol (4B11) and 2.2L diesel (4N14) engines. So yes—this model absolutely relies on a mechanical, belt-driven centrifugal water pump to keep engine temps in check.

On the road, the pump’s job is simple but vital: it circulates coolant through the block, head, radiator and heater core so the ASX warms up promptly and then holds a steady operating temperature. That means better fuel efficiency, stable performance and less chance of hot spots, pre-ignition or head gasket dramas. Because the 4B11 and 4N14 are timing-chain engines, the ASX’s water pump is driven by the auxiliary/serpentine belt, not by a timing belt.

As part of regular servicing, it’s smart to have the pump and cooling system checked each visit. A tech will look for tell-tales like a pink/white crust around the weep hole, a sweet coolant smell, a slight rumble from the pump bearing, or any wobble at the pulley. The drive belt condition and tensioner should be inspected too. Sticking to the specified coolant and change interval in the owner’s manual matters—mixing types can shorten pump life and trigger corrosion. When refilling, bleeding air from the system prevents hot spots and erratic heater performance.

Replacement is generally on condition rather than a strict kilometre target. Many pumps go well past 150,000 km, but leaks, noise or overheating call for action. On an ASX, replacement typically involves draining the coolant, removing the serpentine belt, swapping the pump and gasket/O-ring, then refilling and bleeding the system. It’s good practice to renew the belt, thermostat and fresh coolant at the same time for peace of mind. If the vehicle clocks big kays or is already in for front-end accessory service, a pre-emptive pump swap can be cost-effective.

• Watch for: coolant seepage, bearing noise, pulley play, overheating, low heater output.
• Use: the correct Mitsubishi-specified long-life coolant, don’t mix colours/types.
• Ask your workshop: to pressure-test the system and check for electrolysis if leaks persist.

Popular questions about the 2017 Mitsubishi ASX water pump

Does the 2017 ASX have a timing-belt-driven water pump?
No. The 2017 ASX uses timing chains on both the 2.0L petrol (4B11) and 2.2L diesel (4N14). The water pump is driven by the auxiliary/serpentine belt, which makes pump replacement independent of the timing system.

How long should the water pump last?
There’s no fixed interval. Many last 150,000–250,000 km, depending on coolant quality, driving conditions and belt health. Replace it if there’s leakage, bearing noise, pulley wobble or overheating, and consider renewing it when doing major front-end accessory work.

What coolant should be used after a pump replacement?
Use a Mitsubishi-approved long-life ethylene-glycol coolant as specified in the owner’s manual. Avoid mixing different coolant chemistries or colours. If the existing type is unknown, a full flush before refill is the safest approach.