Parts for your 2004 Toyota Hilux-Drive belt

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

Technical fitment data from Dayco (Australia/NZ), Gates (Australia/NZ) and Toyota’s Electronic Parts Catalogue list auxiliary/drive belts for 2004 Hilux engines such as 1KZ‑TE, 5L‑E and 3RZ‑FE. Those sources confirm a drive-belt is fitted to the 2004 Toyota Hilux to run key accessories like the alternator, power steering pump and air-conditioning compressor.

On this generation Hilux, the drive-belt (also called an auxiliary, fan or serpentine belt) transfers crankshaft power to the vehicle’s accessories. Without it, the alternator won’t charge, steering gets heavy, and the A/C drops off. Some variants use a single multi‑rib belt with an automatic tensioner, while many diesels of the era use two or three individual V‑belts with manual adjusters. Either way, it’s a critical service item separate from any timing belt or chain.

As part of regular servicing, the belt should be inspected every 10,000–15,000 km for condition and tension. In Australian and New Zealand conditions—heat, dust, towing and corrugations—belts age faster. Quality EPDM belts can last a long time, but age hardening and pulley wear still take their toll. Most workshops will recommend replacement around 60,000–100,000 km or 4–6 years, earlier if there are obvious faults.

What to look for during a check:

• Cracks across ribs, fraying edges, glazing/shiny surfaces, missing ribs, or contamination with oil/coolant.
• Squeal on start‑up or with A/C load, flickering battery light, or heavy steering at idle.
• Excessive belt deflection (manual‑adjust systems) or a weak/noisy tensioner (serpentine systems).

Replacement is straightforward for most engines: note the belt routing, relieve tension (spring tensioner or adjuster bolts), remove the old belt, check pulley alignment and bearing feel, then refit and tension to spec. On diesels with multiple V‑belts, replace them as a set so their lengths match under load. After installation, run the engine, recheck alignment and listen for noise, re‑tension manually adjusted belts after the first few hundred kilometres.

A reputable belt that meets OEM spec is worth it—cheap belts glaze and squeal quickly. For touring or remote work, carrying a spare belt (and the right spanners) is smart insurance. If unsure which configuration your Hilux uses, confirm the engine code and whether it’s fitted with A/C, then match the belt profile through an OEM parts listing or a recognised belt catalogue (Dayco/Gates).

FAQs

What belt size does a 2004 Hilux use?
It depends on the engine code (for example, 1KZ‑TE diesel versus 3RZ‑FE petrol) and whether air‑conditioning is fitted. Toyota’s parts catalogue and Australian/NZ belt catalogues specify different lengths and profiles for each variant, so confirm the engine code on the build plate before ordering.

How often should the drive-belt be replaced?
Inspect at every service and plan on replacement around 60,000–100,000 km or 4–6 years. Heavy towing, red dust, heat and frequent short trips can justify earlier changeouts. Replace immediately if there’s cracking, glazing, fraying, noise or poor tension.

Is my 2004 Hilux serpentine or V‑belt?
Many petrol variants run a single serpentine belt with an automatic tensioner, while common diesel variants of this era often use multiple V‑belts with manual adjustment. The layout is obvious on visual inspection and is also listed in OEM and aftermarket parts catalogues.