Parts for your 2022 Mitsubishi Eclipse cross-Thermostat housing

2022 Mitsubishi Eclipse Cross thermostat housing

Yes, the 2022 Mitsubishi Eclipse Cross uses a thermostat and thermostat housing. This is confirmed by Mitsubishi’s factory Service Manual for Eclipse Cross GK/GL series (Cooling System section) and the Mitsubishi ASA/EPC parts catalogue, which show a housing assembly mounted at the cylinder head outlet on both the 1.5L turbo petrol (4B40) and the PHEV’s 2.4L engine. Major aftermarket catalogues that mirror OE listings also carry complete thermostat/housing assemblies for this model, further verifying its fitment.

On the 2022 Eclipse Cross, the thermostat housing holds the thermostat in the correct position, directs coolant from the engine to the radiator, and commonly carries the engine coolant temperature sensor and hose connections. In normal driving it helps the engine warm up quickly and then keeps temperature steady by routing coolant as needed. It’s a small bit of plastic and alloy that does a big job—especially important in Aussie and Kiwi conditions where long climbs, stop–start traffic, and hot days can stress a cooling system.

There’s no fixed “replace-by” kilometre figure for the housing, it’s done on condition. During routine servicing, it’s smart to inspect the housing for staining or crusty deposits, hairline cracks in the plastic, perished hose connections, and weeping at the O-ring. Many shops will replace the thermostat (and its housing if it’s an integrated unit) preventatively when doing a major cooling system refresh or if a fault code like P0128 shows up.

• Common signs it’s time: slow warm-up or running too cool, overheating under load, fluctuating temp gauge, poor cabin heat, visible leaks, sweet coolant smell, or ECT-related fault codes.
• Replacement tips: work on a cold engine, relieve pressure, drain and capture coolant, disconnect the main radiator hose and any sensors, swap in a new housing with a fresh OE-spec O-ring, torque fasteners to the service manual spec, refill with Mitsubishi Super Long Life Coolant (premix) or an approved equivalent, bleed air with the heater on hot, recheck levels after a proper road test.

The housing on many Eclipse Cross variants is a composite/plastic assembly. Over time heat cycles can warp the flange or embrittle hose stubs, leading to minor leaks that slowly worsen. If the vehicle is a PHEV, remember it has additional cooling loops and electric pumps—bleeding procedures differ, and high-voltage safety steps apply, so following the Mitsubishi manual is essential.

Look after the thermostat housing and coolant, and the Eclipse Cross’s turbo petrol or PHEV powertrain will keep its cool across New Zealand backroads and Australian highways alike.

Popular questions

Does the 2022 Mitsubishi Eclipse Cross have a thermostat housing?
It does. Both the 1.5T petrol and the PHEV have a thermostat mounted in a dedicated housing at the cylinder head outlet, as shown in Mitsubishi’s Service Manual and ASA/EPC parts catalogue.

How often should the thermostat housing be replaced?
There’s no set interval. Replace it if there are leaks, cracks, or thermostat faults (e.g., P0128), or whenever doing a major coolant service and the assembly shows age or wear.

What coolant should be used after replacing the housing?
Use Mitsubishi Genuine Super Long Life Coolant (premixed) or an equivalent that meets the same spec. Don’t mix coolant types, stick with one chemistry and top up with the same.