Parts for your 2011 Mitsubishi Outlander-Heater hose

2011 Mitsubishi Outlander heater hose: purpose, care and when to replace

Technical sources—including the Mitsubishi Outlander 2011 Service Manual (Group 55A – Heating & Air Conditioning), the Mitsubishi ASA Electronic Parts Catalogue for the CW/ZH series, and Australian application data from major hose brands (e.g., Gates and Dayco)—confirm the 2011 Mitsubishi Outlander is fitted with dedicated heater water hoses (commonly labelled Heater Water Hose A and B) running between the engine and the heater core at the firewall. So yes, a heater hose is absolutely relevant to this model.

The heater hose carries hot engine coolant to and from the heater core inside the dash. With the engine warm and the climate control set to heat, coolant flows through the core and the blower pushes warm air into the cabin—vital for comfort and for quick demisting on cold, damp mornings. Because these hoses live under the bonnet and see constant heat, pressure and vibration, they age just like radiator hoses.

For owners of a 2011 Outlander, keeping on top of heater hose condition is a smart, low-cost way to protect the engine. A perished hose can split without warning, dump coolant, and quickly lead to overheating. That can escalate into head gasket or engine damage—far pricier than a pair of new hoses and clamps.

• Inspection: Check the two hoses at the firewall every 15,000 km or 12 months. Look for hardness, soft spots, cracks, swelling, oil contamination, coolant crusting, and weeping at the clamp areas. Squeeze them when cold, any spongy or excessively hard feel is a red flag.
• Replacement timing: As general guidance, replace at 8–10 years or 150,000–200,000 km, or sooner if there’s any doubt. Replace both heater hoses as a pair and renew the clamps—constant‑tension (spring) clamps are preferred to avoid over‑tightening.
• Coolant and bleeding: Refill with the coolant type and concentration specified in the owner’s manual (most AU/NZ models use Mitsubishi Super Long Life Coolant). Run the engine with the heater set to HOT to purge air, top up once cooled, and recheck the level the next day.
• Good practice: If you’re already servicing the cooling system—thermostat, water pump, or radiator—add the heater hoses to the job for preventative peace of mind.

Done right, a fresh set of heater hoses keeps the Outlander running cool and the cabin toasty, with no surprises on long Kiwi or Aussie road trips.

Popular questions about the 2011 Mitsubishi Outlander heater hose

Where are the heater hoses located on a 2011 Outlander?
They’re the two coolant hoses running to the heater core pipes at the firewall (bulkhead) at the rear of the engine bay. On AU/NZ right‑hand‑drive models, you’ll see them side‑by‑side, usually with spring clamps, feeding through the bulkhead into the cabin heater core.

How often should heater hoses be replaced?
Inspect every service and plan replacement around 8–10 years or 150,000–200,000 km. Replace immediately if you spot cracks, swelling, leaks, soft spots, or heavy age hardening. Doing both hoses together with new clamps is the safest approach.

Is it OK to bypass a leaking heater hose?
Bypassing (looping the engine hoses) is only an emergency get‑you‑home fix. You’ll lose cabin heat and risk trapped air if it’s not bled properly. It’s best to repair correctly with the proper moulded hose and the right coolant as soon as possible.