Parts for your 2004 Toyota Highlander-Drive belt pulley

2004 Toyota Highlander drive-belt-pulley: what it does and when to replace it

Yes, the 2004 Toyota Highlander (called Kluger in Australia and New Zealand) absolutely uses a drive-belt-pulley system. Toyota’s factory Repair Manual (TIS) for the 2004 Highlander/Kluger shows an accessory “drive belt” with multiple pulleys on both engines offered that year: the 2.4L 2AZ‑FE and the 3.3L 3MZ‑FE. The layout includes the crankshaft pulley (harmonic balancer) plus pulleys on the alternator, A/C compressor, power steering pump, an idler and an automatic tensioner. On the 2AZ‑FE, the water pump is belt‑driven, on the 3MZ‑FE it’s driven by the timing belt but still shares the accessory pulleys. This is consistent with Toyota owner’s literature and mainstream parts catalogues from belt manufacturers.

Because it’s fitted, the drive-belt-pulley setup is central to keeping the Highlander’s electrics charged, the steering light, and the cabin cool. The crank pulley sends rotation through the serpentine belt to the other pulleys, while the tensioner and idler keep the belt tracking straight and at the right tension. When any pulley bearing wears, it can squeal, chirp, or wobble, which quickly chews out belts and can strand the vehicle.

As part of servicing a 2004 Highlander/Kluger, it’s smart to inspect the drive-belt and every pulley at each service interval. Under the bonnet with the engine off, check the belt for cracking, glazing, frayed edges, or contamination. Spin and wiggle exposed pulleys by hand, any roughness, play, or noise means replacement. A noise that disappears when the belt is removed usually points to a pulley or driven accessory rather than the engine itself.

• Inspect at each service (around 10,000–15,000 km). Replace the belt around 100,000–160,000 km or 6–8 years, sooner if worn.
• Replace noisy or loose idler/tensioner pulleys immediately, if the tensioner pulley is tired, the full tensioner assembly is often the best fix.
• Use the correct belt routing and confirm the tensioner index is within spec after fitting. Start the engine and watch for belt wander.
• For V6 models, when doing the timing belt, take the chance to check all accessory pulleys and the serpentine belt together.

These recommendations align with Toyota’s Repair Manual guidance for the 2AZ‑FE/3MZ‑FE “Drive Belt” procedures and the 2004 Owner’s Manual maintenance schedule, as well as major aftermarket belt and pulley catalogues.

Popular questions

Does a 2004 Toyota Highlander actually have a drive-belt-pulley?
It does. Both the 2.4L 2AZ‑FE and 3.3L 3MZ‑FE engines use an accessory serpentine drive with multiple pulleys, as detailed in Toyota’s 2004 Highlander/Kluger Repair Manual (Drive Belt section). The system drives the alternator, A/C compressor, power steering pump, and idler/tensioner pulleys, the 2AZ‑FE also drives the water pump via this belt.

How often should the drive-belt and pulleys be replaced?
Inspect at every service and replace the belt roughly every 100,000–160,000 km or 6–8 years based on condition. Pulleys aren’t time-based, replace them whenever there’s bearing noise, play, misalignment, or visible wobble. If the belt has failed prematurely or is noisy, check the tensioner and idler first.

What noises point to a failing drive-belt-pulley?
Common signs include a cold-start chirp, a steady squeal that changes with revs, or a dry, grinding sound at idle. A fluttering belt or visible pulley wobble also gives the game away. Remove the belt and spin each pulley, any roughness or rumble means it’s due for replacement.