Parts for your 2015 Ford Fiesta-Drive belt pulley

2015 Ford Fiesta drive-belt pulley — what it does and how to look after it

Yes, the 2015 Ford Fiesta absolutely uses drive-belt pulleys. Technical references including the Ford Workshop Manual (Fiesta 2011–2017, Section 303-05A Accessory Drive), Motorcraft service information, the Gates Micro-V catalogue, and INA/Schaeffler listings for overrunning alternator pulleys all show a serpentine accessory drive on Fiesta engines such as the 1.0 EcoBoost, 1.6 Ti‑VCT, and 1.6 EcoBoost ST. That system relies on a crankshaft (harmonic balancer) pulley, an automatic tensioner and idler pulleys, and an alternator pulley (often an OAD/OAP decoupler). Power steering is electric on this model, so there’s no hydraulic power-steering pump pulley to worry about, but the alternator and A/C compressor are still belt-driven.

On a 2015 Fiesta, the drive belt pulley system transfers torque from the crank to run the alternator and air-con while keeping everything smooth and quiet. The crank pulley also acts as a damper, soaking up torsional vibration so the engine feels refined and the belt doesn’t flap. Many Fiestas use an overrunning alternator pulley that freewheels on decel, which reduces belt chirp and protects the belt and tensioner from shock loads. When these pulleys are healthy, the car charges properly, the A/C stays cold, and there are no odd rattles at idle.

As part of regular servicing, it’s smart to inspect the belt and pulleys every 12 months or 20,000 km, or sooner if there’s noise. Look for rubber dust, frayed ribs, glazing, oil contamination, or any wobble at the crank pulley. Check the tensioner’s pointer travel and smooth operation. Spin idlers and listen for dry or rough bearings. If the alternator pulley is an overrunning type, a quick freewheel test can reveal binding or slip. On higher-kilometre cars, replace the belt, tensioner and idlers as a set to avoid repeat labour. If the harmonic balancer shows cracked or perished rubber, it should be replaced immediately. Where the crank pulley uses a torque‑to‑yield bolt, bin the old one and torque the new fastener to the factory spec and angle. Some models need the right-hand engine mount loosened for access—support the engine properly and disconnect the battery before any alternator or A/C work. Don’t confuse the accessory belt with the 1.0 EcoBoost’s timing belt-in-oil, they’re completely different systems with different intervals.

• Common clues it’s time: cold-start squeal, rattling at idle, flickering lights, poor charging, or belt tracking off a rib.
• Go OEM-quality on pulleys and belt, correct alignment and the right tools (including an OAD removal tool if fitted) make all the difference.

Does the 2015 Fiesta have a power-steering pulley?

No. The 2015 Ford Fiesta uses electric power-assisted steering (EPAS), so there’s no hydraulic pump and no power-steering pulley on the accessory belt. That’s one fewer pulley to maintain, and it’s why the belt typically drives just the alternator, A/C compressor, and associated idlers/tensioner.

When should the belt and pulleys be replaced?

Inspect yearly or every 20,000 km and replace on condition. Many belts last 100,000–160,000 km in local conditions, but noise, cracking, contamination, wobble at the crank pulley, a lazy tensioner, or a rough idler bearing means it’s time. If one pulley has failed, replacing the belt, tensioner and idlers together is good practice.

How can someone tell if the alternator overrunning pulley is failing?

Listen for a chirp or rattle on overrun, watch for belt flutter after a throttle blip, and check charging stability under load. Off the car, an OAD/OAP should rotate one way and lock the other, binding or freewheeling both ways points to replacement. A seized OAD can also make the tensioner bounce.