Parts for your 2006 Toyota Highlander-Drive belt

2006 Toyota Highlander drive-belt — what it does and when to replace it

Technical sources indicate a drive-belt is fitted to 2006 Toyota Highlander petrol (non‑hybrid) models, while the 2006 Highlander Hybrid does not use an external accessory drive-belt. The Toyota Repair Manual and Toyota EPC list an accessory/serpentine belt for the 2AZ‑FE 2.4‑litre and 3MZ‑FE 3.3‑litre petrol engines, and major belt catalogues (Gates, Dayco) provide applicable part numbers for those variants. By contrast, Toyota’s hybrid service literature for the 3MZ‑FE Hybrid shows no alternator or power‑steering pump and specifies an electric A/C compressor, with those accessories deleted, the hybrid has no external serpentine belt.

Why the hybrid skips a drive-belt: the Hybrid uses MG1 as a generator (so no alternator belt), electric power steering, and an electric A/C compressor. On the V6 hybrid, the engine’s water pump is driven by the timing belt within the front cover, not by an external serpentine belt. That design removes the need for a conventional accessory drive-belt altogether.

For petrol (non‑hybrid) models, the drive-belt—often called a serpentine belt—spins the alternator, power‑steering pump and A/C compressor, and on some engines also the water pump. It’s a simple bit of kit that keeps charging steady, steering light and cabin air chilly. As rubber ages, heat, oil mist and road grime harden the belt and wear the ribs, so routine inspection and timely replacement save bigger hassles down the track.

Servicing-wise, it’s smart to have the belt checked at every service. A technician will look for cracks across the ribs, glazing (a shiny surface), fraying, missing chunks, or rib “undercut” that causes chirps or squeals on cold starts. Any of those signs means it’s time for a new belt. Many owners opt to replace the belt preventively around 90,000–120,000 kilometres, or earlier in hot, dusty, stop‑start conditions. If the 2.4‑litre model uses the belt to drive the water pump, a failure can quickly lead to overheating—so don’t push a tired belt past its prime.

Good practice is to replace the automatic tensioner and idler pulleys if they’re noisy or the belt shows uneven wear, a fresh belt on a weak tensioner won’t stay quiet for long. On the 3.3‑litre V6, timing belt service (often due around 150,000 km or by age) is a handy moment to fit a new accessory belt as well, since access is already improved. Use the correct spec belt for the engine code, route it exactly as per the under‑bonnet diagram, and run the engine to confirm quiet operation and stable charging. It’s a quick job that keeps the Highlander happy for years.

• Inspect at every service, replace at first signs of cracking, glazing, fraying or noise.
• Consider renewal around 90,000–120,000 km, sooner in harsh conditions.
• Check/replace tensioner and idlers if rough or noisy.

Note for Hybrid owners: the 2006 Highlander Hybrid has no external accessory drive-belt. Its key accessories are electric, and the V6 hybrid water pump is driven by the timing belt. Belt-related inspections focus on the timing belt service interval and coolant pump condition rather than a serpentine belt.

FAQs

Does the 2006 Highlander Hybrid have a drive-belt?
No. The 2006 Highlander Hybrid uses electric power steering and an electric A/C compressor, and it doesn’t have an alternator. With those belt-driven accessories deleted, there’s no external serpentine drive-belt. The V6 hybrid’s water pump is driven by the timing belt inside the front cover.

How often should the drive-belt be replaced on a 2006 Highlander (non‑hybrid)?
Have it inspected at every service and plan on replacement around 90,000–120,000 kilometres, or immediately if there are cracks, glazing, fraying, squeals, or charging/overheating issues. Harsh conditions may shorten that interval.

What else should be replaced with the belt?
If the belt shows uneven wear or there’s any rattle or roughness, replace the automatic tensioner and idler pulleys. On the V6, aligning accessory belt replacement with timing belt service can save time and labour.