Parts for your 2001 Subaru Legacy-Drive belt pulley

2001 Subaru Legacy drive-belt pulley: purpose and servicing tips

Yes—this model absolutely uses drive-belt pulleys. The 2001 Subaru Legacy (known as Liberty in AU/NZ) runs multiple accessory pulleys for the alternator, power-steering pump, and air-conditioning compressor, all driven off the crankshaft pulley. This is documented in the Subaru Factory Service Manual for the 2001 Legacy/Outback (EJ25 SOHC) under the Drive Belt section, in Subaru’s FAST/Global Parts Catalogue diagrams, and in Gates and Dayco accessory belt catalogues for the 2001 EJ25, all of which list the belts, idler pulleys, and related hardware.

The pulleys route and transmit the crank’s rotation to keep the battery charging, the steering light, and the cabin cool. The crankshaft pulley (harmonic balancer) also dampens torsional vibration to protect the engine and the belt drive. Unlike some engines, the EJ25’s coolant pump is run by the timing belt, not the accessory belts, so a failed accessory belt won’t directly stop coolant flow—but it can still leave the car without charging or power steering assist.

On this year, there are typically two V‑ribbed belts: one for alternator/power steering and one for A/C, with fixed or adjustable idler pulleys rather than a single spring tensioner. Good servicing practice (as echoed by the Subaru FSM and Gates ABDS guidance) is to inspect belt condition and pulley bearings at every service interval. Look for pulley wobble, rubber delamination on the harmonic balancer, rough or noisy idler bearings, or belt glazing/cracking. Spin idlers by hand with the belt off, any grittiness or play means replacement. Keep oil and coolant off the belts and pulleys, and make sure the grooves are clean.

When replacing parts, use quality OEM-equivalent pulleys and belts, set tension with the proper adjuster hardware (don’t lever on the belt), and recheck tension after a few hundred kilometres as new belts bed in. If a pulley fails or a belt comes off, expect heavy steering, charge warning lights, and no A/C, park up and sort it promptly to avoid being stranded. Always carry a spare belt.

• Common signs it’s time: chirping or squeal on cold start, visible pulley wobble, burnt rubber smell, frayed belt edges, or a rough‑spinning idler.

Does the 2001 Subaru Legacy use two drive belts or a single serpentine belt?

Most 2001 EJ25 vehicles use two V‑ribbed belts: one drives the alternator and power steering, and the other drives the A/C. That layout matches the Subaru service manual and major aftermarket catalogues for the model year.

Always check under the bonnet or confirm by VIN, as equipment can vary by market and trim.

What noises point to a bad drive-belt pulley on a 2001 Legacy?

A sharp chirp or squeal on cold start that changes with revs often means a glazed belt or misaligned/wobbling pulley. A constant rumble or grinding that doesn’t go away as the belt warms usually indicates a dry or failing idler bearing.

If a quick water mist on the belt briefly quietens the noise, the belt is suspect, if not, look hard at the pulleys.

Is the crankshaft pulley the same as the harmonic balancer on this model?

Yes—the crank pulley is an integrated harmonic balancer. The bonded rubber ring can age and separate, causing wobble, belt misalignment, and vibration. When it’s tired, replace the balancer as a complete assembly.

Correct installation and bolt torque are critical to avoid future loosening or vibration, so follow the factory procedure.