Parts for your 2020 Toyota Rav4-Drive belt pulley

2020 Toyota RAV4 drive-belt pulley: fitted on petrol, not used on hybrid

On the 2020 Toyota RAV4, the drive-belt pulley setup depends on the engine. Petrol models with the A25A‑FKS engine use a serpentine (V‑ribbed) drive belt with pulleys (crank, alternator, A/C compressor) plus an automatic tensioner and idler(s). Hybrid models with the A25A‑FXS engine are beltless, so a traditional drive-belt pulley is not used. This fitment is supported by Toyota’s technical publications: the Toyota Service Information (TIS) 2020 RAV4 Repair Manual lists Drive Belt procedures for A25A‑FKS petrol, while Toyota New Car Features (AXAA/AXAH series) notes the hybrid’s electric water pump and electric A/C compressor (no accessory belt). The Toyota Electronic Parts Catalogue similarly shows a belt, tensioner and idlers for the petrol, and no accessory belt or pulleys for the hybrid.

For petrol 2020 RAV4s where a drive-belt pulley is fitted, this system is the quiet achiever that keeps day‑to‑day motoring easy. The crank pulley spins the serpentine belt, which then turns the alternator to keep the battery charged and runs the A/C compressor so the cabin stays cool. Idler pulleys guide the belt, and the automatic tensioner keeps the belt taut as it wears and the engine loads change. When any pulley bearing gets tired or the belt ages, owners might hear a chirp, squeal or whirr, especially on cold starts or with the A/C on.

Good servicing habits go a long way. Under the bonnet, the belt and pulleys should be inspected at each scheduled service (about every 12 months or 15,000 kilometres in Australia and New Zealand, or as per the owner’s handbook). Look for belt cracking, glazing, fraying or contamination, and check for pulley wobble, roughness, or rust‑coloured dust from a failing bearing. The tensioner should move smoothly and hold steady. Many belts last 100,000–150,000 km in local conditions, but age, heat and dust can shorten that. Replace the belt sooner if it’s noisy or worn, and don’t hesitate to renew the tensioner and idler(s) if their bearings feel gritty or loose—doing them together saves a second visit.

Replacing the belt is a straightforward workshop job: follow the correct routing, unload the tensioner safely, and torque fasteners to spec. After fitting, run the engine and watch the belt track. Any ongoing squeak, a battery charge warning, or weak A/C performance is a cue to get it checked promptly so a simple belt or pulley swap doesn’t turn into a bigger headache.

Why hybrids don’t use a drive-belt pulley on 2020 RAV4: Toyota’s hybrid A25A‑FXS runs an electric water pump, an electric A/C compressor and a DC‑DC converter instead of a belt‑driven alternator. With no belt‑driven accessories, there’s no serpentine belt, tensioner or idler pulleys to service—less drag, fewer wear items and quieter operation.

Technical sources referenced: Toyota Service Information (TIS) 2020 RAV4 Repair Manual, Engine/Hybrid System—Drive Belt (A25A‑FKS), Toyota New Car Features, RAV4 (AXAA/AXAH series) 2019–, Hybrid system and auxiliaries, Toyota Electronic Parts Catalogue (EPC) for 2020 RAV4, A25A‑FKS (V‑ribbed belt, tensioner, idler) vs A25A‑FXS (no accessory belt).

• Signs a pulley or belt needs attention: squeal/chirp, visible belt damage, wobbling pulley, burning rubber smell, intermittent battery light or weak A/C.

Popular questions

Do all 2020 RAV4s have a drive belt and pulley?
No. Petrol models (A25A‑FKS) have a serpentine belt with pulleys, tensioner and idlers. Hybrid models (A25A‑FXS) are beltless because the water pump and A/C are electric and there’s no conventional alternator.

How often should the belt and pulleys be replaced on a 2020 RAV4 petrol?
Inspect them at every service. Many belts last 100,000–150,000 km, but replace earlier if there’s noise or wear. Tensioners and idlers should be renewed if bearings feel rough or there’s wobble, changing them with the belt is smart preventative maintenance.

What noises point to a failing drive-belt pulley?
A chirp or squeal on cold start, a steady whirr that rises with revs, or a rhythmic chirp with A/C on often indicates a worn idler or tensioner bearing, misalignment, or a glazed belt. Any of these are worth a prompt check before the belt shreds or jumps off.