Parts for your 2006 Toyota Highlander-Radiator

2006 Toyota Highlander Radiator — What it does and how to look after it

Technical references for the 2006 Toyota Highlander (Kluger in AU/NZ) confirm it’s fitted with a conventional engine radiator. Toyota service information and the Toyota Electronic Parts Catalogue list a radiator core and tank assembly for both the 2.4L 2AZ‑FE and 3.3L 3MZ‑FE engines, and the Hybrid variant adds a separate inverter/e‑drive cooling circuit alongside the engine radiator. So yes—this model absolutely uses a radiator, and it’s central to keeping the vehicle happy under the bonnet.

The radiator’s job is simple but vital: it sheds heat from the engine coolant so the motor runs in its sweet spot, even on scorching summer days or while towing. It’s typically an aluminium core with plastic end tanks and, on many automatic models, houses an integrated transmission fluid cooler. Healthy coolant flow, a clean fin pack, and good pressure control from the cap all help keep temperatures steady and the heater working properly.

For servicing, Toyota’s Super Long Life Coolant (pink, premixed) is the go-to. The typical guidance is an initial coolant service at around 160,000 km or 10 years, then every 80,000 km or 5 years thereafter. Aussie and Kiwi conditions—heat, dust, coastal air—can be tough on radiators, so it pays to check levels, hoses, and the cap at each service. Expect roughly 7–9 litres total capacity depending on engine and HVAC